diff --git a/test/core/end2end/bad_server_response_test.cc b/test/core/end2end/bad_server_response_test.cc
index 2b98620..124d05a 100644
--- a/test/core/end2end/bad_server_response_test.cc
+++ b/test/core/end2end/bad_server_response_test.cc
@@ -133,7 +133,7 @@
                        grpc_pollset* accepting_pollset,
                        grpc_tcp_server_acceptor* acceptor) {
   gpr_free(acceptor);
-  test_tcp_server* server = (test_tcp_server*)arg;
+  test_tcp_server* server = static_cast<test_tcp_server*>(arg);
   GRPC_CLOSURE_INIT(&on_read, handle_read, nullptr, grpc_schedule_on_exec_ctx);
   GRPC_CLOSURE_INIT(&on_write, done_write, nullptr, grpc_schedule_on_exec_ctx);
   grpc_slice_buffer_init(&state.temp_incoming_buffer);
@@ -196,7 +196,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(state.call, ops, (size_t)(op - ops), tag(1),
+  error = grpc_call_start_batch(state.call, ops, static_cast<size_t>(op - ops), tag(1),
                                 nullptr);
 
   GPR_ASSERT(GRPC_CALL_OK == error);
@@ -236,7 +236,7 @@
 } poll_args;
 
 static void actually_poll_server(void* arg) {
-  poll_args* pa = (poll_args*)arg;
+  poll_args* pa = static_cast<poll_args*>(arg);
   gpr_timespec deadline = n_sec_deadline(10);
   while (true) {
     bool done = gpr_atm_acq_load(&state.done_atm) != 0;
@@ -258,7 +258,7 @@
   gpr_atm_rel_store(&state.done_atm, 0);
   state.write_done = 0;
   gpr_thd_id id;
-  poll_args* pa = (poll_args*)gpr_malloc(sizeof(*pa));
+  poll_args* pa = static_cast<poll_args*>(gpr_malloc(sizeof(*pa)));
   pa->server = server;
   pa->signal_when_done = signal_when_done;
   gpr_thd_new(&id, "grpc_poll_server", actually_poll_server, pa, nullptr);
diff --git a/test/core/end2end/cq_verifier.cc b/test/core/end2end/cq_verifier.cc
index a7b37f3..c3a3f43 100644
--- a/test/core/end2end/cq_verifier.cc
+++ b/test/core/end2end/cq_verifier.cc
@@ -61,7 +61,7 @@
 };
 
 cq_verifier* cq_verifier_create(grpc_completion_queue* cq) {
-  cq_verifier* v = (cq_verifier*)gpr_malloc(sizeof(cq_verifier));
+  cq_verifier* v = static_cast<cq_verifier*>(gpr_malloc(sizeof(cq_verifier)));
   v->cq = cq;
   v->first_expectation = nullptr;
   return v;
@@ -305,7 +305,7 @@
 
 static void add(cq_verifier* v, const char* file, int line,
                 grpc_completion_type type, void* tag, bool success) {
-  expectation* e = (expectation*)gpr_malloc(sizeof(expectation));
+  expectation* e = static_cast<expectation*>(gpr_malloc(sizeof(expectation)));
   e->type = type;
   e->file = file;
   e->line = line;
diff --git a/test/core/end2end/dualstack_socket_test.cc b/test/core/end2end/dualstack_socket_test.cc
index 2dc72b8..a7f10e4 100644
--- a/test/core/end2end/dualstack_socket_test.cc
+++ b/test/core/end2end/dualstack_socket_test.cc
@@ -129,7 +129,7 @@
     char** hosts_with_port;
 
     uri_slice =
-        grpc_slice_new((char*)client_host, strlen(client_host), do_nothing);
+        grpc_slice_new(const_cast<char*>(client_host), strlen(client_host), do_nothing);
     grpc_slice_buffer_init(&uri_parts);
     grpc_slice_split(uri_slice, ",", &uri_parts);
     hosts_with_port =
@@ -199,7 +199,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   if (expect_ok) {
@@ -228,7 +228,7 @@
     op->flags = 0;
     op++;
     error =
-        grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+        grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
 
     CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
diff --git a/test/core/end2end/fixtures/h2_oauth2.cc b/test/core/end2end/fixtures/h2_oauth2.cc
index 795e94a..9453f2f 100644
--- a/test/core/end2end/fixtures/h2_oauth2.cc
+++ b/test/core/end2end/fixtures/h2_oauth2.cc
@@ -66,7 +66,7 @@
   test_processor_state* s;
 
   GPR_ASSERT(state != nullptr);
-  s = (test_processor_state*)state;
+  s = static_cast<test_processor_state*>(state);
   GPR_ASSERT(s->pseudo_refcount == 1);
   GPR_ASSERT(oauth2 != nullptr);
   grpc_auth_context_add_cstring_property(ctx, client_identity_property_name,
@@ -84,7 +84,7 @@
       find_metadata(md, md_count, "authorization", oauth2_md);
   test_processor_state* s;
   GPR_ASSERT(state != nullptr);
-  s = (test_processor_state*)state;
+  s = static_cast<test_processor_state*>(state);
   GPR_ASSERT(s->pseudo_refcount == 1);
   GPR_ASSERT(oauth2 != nullptr);
   cb(user_data, oauth2, 1, nullptr, 0, GRPC_STATUS_UNAUTHENTICATED, nullptr);
@@ -177,7 +177,7 @@
 }
 
 static void processor_destroy(void* state) {
-  test_processor_state* s = (test_processor_state*)state;
+  test_processor_state* s = static_cast<test_processor_state*>(state);
   GPR_ASSERT((s->pseudo_refcount--) == 1);
   gpr_free(s);
 }
diff --git a/test/core/end2end/fixtures/http_proxy_fixture.cc b/test/core/end2end/fixtures/http_proxy_fixture.cc
index 2d5e841..4776cfb 100644
--- a/test/core/end2end/fixtures/http_proxy_fixture.cc
+++ b/test/core/end2end/fixtures/http_proxy_fixture.cc
@@ -185,7 +185,7 @@
 
 // Callback for writing proxy data to the client.
 static void on_client_write_done(void* arg, grpc_error* error) {
-  proxy_connection* conn = (proxy_connection*)arg;
+  proxy_connection* conn = static_cast<proxy_connection*>(arg);
   conn->client_is_writing = false;
   if (error != GRPC_ERROR_NONE) {
     proxy_connection_failed(conn, CLIENT_WRITE_FAILED,
@@ -210,7 +210,7 @@
 
 // Callback for writing proxy data to the backend server.
 static void on_server_write_done(void* arg, grpc_error* error) {
-  proxy_connection* conn = (proxy_connection*)arg;
+  proxy_connection* conn = static_cast<proxy_connection*>(arg);
   conn->server_is_writing = false;
   if (error != GRPC_ERROR_NONE) {
     proxy_connection_failed(conn, SERVER_WRITE_FAILED,
@@ -236,7 +236,7 @@
 // Callback for reading data from the client, which will be proxied to
 // the backend server.
 static void on_client_read_done(void* arg, grpc_error* error) {
-  proxy_connection* conn = (proxy_connection*)arg;
+  proxy_connection* conn = static_cast<proxy_connection*>(arg);
   if (error != GRPC_ERROR_NONE) {
     proxy_connection_failed(conn, CLIENT_READ_FAILED, "HTTP proxy client read",
                             GRPC_ERROR_REF(error));
@@ -267,7 +267,7 @@
 // Callback for reading data from the backend server, which will be
 // proxied to the client.
 static void on_server_read_done(void* arg, grpc_error* error) {
-  proxy_connection* conn = (proxy_connection*)arg;
+  proxy_connection* conn = static_cast<proxy_connection*>(arg);
   if (error != GRPC_ERROR_NONE) {
     proxy_connection_failed(conn, SERVER_READ_FAILED, "HTTP proxy server read",
                             GRPC_ERROR_REF(error));
@@ -297,7 +297,7 @@
 
 // Callback to write the HTTP response for the CONNECT request.
 static void on_write_response_done(void* arg, grpc_error* error) {
-  proxy_connection* conn = (proxy_connection*)arg;
+  proxy_connection* conn = static_cast<proxy_connection*>(arg);
   conn->client_is_writing = false;
   if (error != GRPC_ERROR_NONE) {
     proxy_connection_failed(conn, SETUP_FAILED, "HTTP proxy write response",
@@ -321,7 +321,7 @@
 // Callback to connect to the backend server specified by the HTTP
 // CONNECT request.
 static void on_server_connect_done(void* arg, grpc_error* error) {
-  proxy_connection* conn = (proxy_connection*)arg;
+  proxy_connection* conn = static_cast<proxy_connection*>(arg);
   if (error != GRPC_ERROR_NONE) {
     // TODO(roth): Technically, in this case, we should handle the error
     // by returning an HTTP response to the client indicating that the
@@ -370,7 +370,7 @@
 // of this test code, it's fine to pretend this is a client-side error,
 // which will cause the client connection to be dropped.
 static void on_read_request_done(void* arg, grpc_error* error) {
-  proxy_connection* conn = (proxy_connection*)arg;
+  proxy_connection* conn = static_cast<proxy_connection*>(arg);
   gpr_log(GPR_DEBUG, "on_read_request_done: %p %s", conn,
           grpc_error_string(error));
   if (error != GRPC_ERROR_NONE) {
@@ -456,9 +456,9 @@
                       grpc_pollset* accepting_pollset,
                       grpc_tcp_server_acceptor* acceptor) {
   gpr_free(acceptor);
-  grpc_end2end_http_proxy* proxy = (grpc_end2end_http_proxy*)arg;
+  grpc_end2end_http_proxy* proxy = static_cast<grpc_end2end_http_proxy*>(arg);
   // Instantiate proxy_connection.
-  proxy_connection* conn = (proxy_connection*)gpr_zalloc(sizeof(*conn));
+  proxy_connection* conn = static_cast<proxy_connection*>(gpr_zalloc(sizeof(*conn)));
   gpr_ref(&proxy->users);
   conn->client_endpoint = endpoint;
   conn->proxy = proxy;
@@ -499,7 +499,7 @@
 //
 
 static void thread_main(void* arg) {
-  grpc_end2end_http_proxy* proxy = (grpc_end2end_http_proxy*)arg;
+  grpc_end2end_http_proxy* proxy = static_cast<grpc_end2end_http_proxy*>(arg);
   grpc_core::ExecCtx exec_ctx;
   do {
     gpr_ref(&proxy->users);
@@ -518,7 +518,7 @@
     grpc_channel_args* args) {
   grpc_core::ExecCtx exec_ctx;
   grpc_end2end_http_proxy* proxy =
-      (grpc_end2end_http_proxy*)gpr_malloc(sizeof(*proxy));
+      static_cast<grpc_end2end_http_proxy*>(gpr_malloc(sizeof(*proxy)));
   memset(proxy, 0, sizeof(*proxy));
   proxy->combiner = grpc_combiner_create();
   gpr_ref_init(&proxy->users, 1);
@@ -533,7 +533,7 @@
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   // Bind to port.
   grpc_resolved_address resolved_addr;
-  struct sockaddr_in* addr = (struct sockaddr_in*)resolved_addr.addr;
+  struct sockaddr_in* addr = reinterpret_cast<struct sockaddr_in*>(resolved_addr.addr);
   memset(&resolved_addr, 0, sizeof(resolved_addr));
   addr->sin_family = AF_INET;
   grpc_sockaddr_set_port(&resolved_addr, proxy_port);
@@ -542,7 +542,7 @@
   GPR_ASSERT(error == GRPC_ERROR_NONE);
   GPR_ASSERT(port == proxy_port);
   // Start server.
-  proxy->pollset = (grpc_pollset*)gpr_zalloc(grpc_pollset_size());
+  proxy->pollset = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
   grpc_pollset_init(proxy->pollset, &proxy->mu);
   grpc_tcp_server_start(proxy->server, &proxy->pollset, 1, on_accept, proxy);
 
@@ -555,7 +555,7 @@
 }
 
 static void destroy_pollset(void* arg, grpc_error* error) {
-  grpc_pollset* pollset = (grpc_pollset*)arg;
+  grpc_pollset* pollset = static_cast<grpc_pollset*>(arg);
   grpc_pollset_destroy(pollset);
   gpr_free(pollset);
 }
diff --git a/test/core/end2end/fixtures/proxy.cc b/test/core/end2end/fixtures/proxy.cc
index 7a35796..d0a4bbb 100644
--- a/test/core/end2end/fixtures/proxy.cc
+++ b/test/core/end2end/fixtures/proxy.cc
@@ -80,7 +80,7 @@
   int proxy_port = grpc_pick_unused_port_or_die();
   int server_port = grpc_pick_unused_port_or_die();
 
-  grpc_end2end_proxy* proxy = (grpc_end2end_proxy*)gpr_malloc(sizeof(*proxy));
+  grpc_end2end_proxy* proxy = static_cast<grpc_end2end_proxy*>(gpr_malloc(sizeof(*proxy)));
   memset(proxy, 0, sizeof(*proxy));
 
   gpr_join_host_port(&proxy->proxy_port, "localhost", proxy_port);
@@ -107,14 +107,14 @@
 }
 
 static closure* new_closure(void (*func)(void* arg, int success), void* arg) {
-  closure* cl = (closure*)gpr_malloc(sizeof(*cl));
+  closure* cl = static_cast<closure*>(gpr_malloc(sizeof(*cl)));
   cl->func = func;
   cl->arg = arg;
   return cl;
 }
 
 static void shutdown_complete(void* arg, int success) {
-  grpc_end2end_proxy* proxy = (grpc_end2end_proxy*)arg;
+  grpc_end2end_proxy* proxy = static_cast<grpc_end2end_proxy*>(arg);
   proxy->shutdown = 1;
   grpc_completion_queue_shutdown(proxy->cq);
 }
@@ -147,12 +147,12 @@
 static void refpc(proxy_call* pc, const char* reason) { gpr_ref(&pc->refs); }
 
 static void on_c2p_sent_initial_metadata(void* arg, int success) {
-  proxy_call* pc = (proxy_call*)arg;
+  proxy_call* pc = static_cast<proxy_call*>(arg);
   unrefpc(pc, "on_c2p_sent_initial_metadata");
 }
 
 static void on_p2s_recv_initial_metadata(void* arg, int success) {
-  proxy_call* pc = (proxy_call*)arg;
+  proxy_call* pc = static_cast<proxy_call*>(arg);
   grpc_op op;
   grpc_call_error err;
 
@@ -174,14 +174,14 @@
 }
 
 static void on_p2s_sent_initial_metadata(void* arg, int success) {
-  proxy_call* pc = (proxy_call*)arg;
+  proxy_call* pc = static_cast<proxy_call*>(arg);
   unrefpc(pc, "on_p2s_sent_initial_metadata");
 }
 
 static void on_c2p_recv_msg(void* arg, int success);
 
 static void on_p2s_sent_message(void* arg, int success) {
-  proxy_call* pc = (proxy_call*)arg;
+  proxy_call* pc = static_cast<proxy_call*>(arg);
   grpc_op op;
   grpc_call_error err;
 
@@ -201,12 +201,12 @@
 }
 
 static void on_p2s_sent_close(void* arg, int success) {
-  proxy_call* pc = (proxy_call*)arg;
+  proxy_call* pc = static_cast<proxy_call*>(arg);
   unrefpc(pc, "on_p2s_sent_close");
 }
 
 static void on_c2p_recv_msg(void* arg, int success) {
-  proxy_call* pc = (proxy_call*)arg;
+  proxy_call* pc = static_cast<proxy_call*>(arg);
   grpc_op op;
   grpc_call_error err;
 
@@ -241,7 +241,7 @@
 static void on_p2s_recv_msg(void* arg, int success);
 
 static void on_c2p_sent_message(void* arg, int success) {
-  proxy_call* pc = (proxy_call*)arg;
+  proxy_call* pc = static_cast<proxy_call*>(arg);
   grpc_op op;
   grpc_call_error err;
 
@@ -261,7 +261,7 @@
 }
 
 static void on_p2s_recv_msg(void* arg, int success) {
-  proxy_call* pc = (proxy_call*)arg;
+  proxy_call* pc = static_cast<proxy_call*>(arg);
   grpc_op op;
   grpc_call_error err;
 
@@ -281,12 +281,12 @@
 }
 
 static void on_c2p_sent_status(void* arg, int success) {
-  proxy_call* pc = (proxy_call*)arg;
+  proxy_call* pc = static_cast<proxy_call*>(arg);
   unrefpc(pc, "on_c2p_sent_status");
 }
 
 static void on_p2s_status(void* arg, int success) {
-  proxy_call* pc = (proxy_call*)arg;
+  proxy_call* pc = static_cast<proxy_call*>(arg);
   grpc_op op;
   grpc_call_error err;
 
@@ -311,18 +311,18 @@
 }
 
 static void on_c2p_closed(void* arg, int success) {
-  proxy_call* pc = (proxy_call*)arg;
+  proxy_call* pc = static_cast<proxy_call*>(arg);
   unrefpc(pc, "on_c2p_closed");
 }
 
 static void on_new_call(void* arg, int success) {
-  grpc_end2end_proxy* proxy = (grpc_end2end_proxy*)arg;
+  grpc_end2end_proxy* proxy = static_cast<grpc_end2end_proxy*>(arg);
   grpc_call_error err;
 
   if (success) {
     grpc_op op;
     memset(&op, 0, sizeof(op));
-    proxy_call* pc = (proxy_call*)gpr_malloc(sizeof(*pc));
+    proxy_call* pc = static_cast<proxy_call*>(gpr_malloc(sizeof(*pc)));
     memset(pc, 0, sizeof(*pc));
     pc->proxy = proxy;
     GPR_SWAP(grpc_metadata_array, pc->c2p_initial_metadata,
@@ -412,7 +412,7 @@
 }
 
 static void thread_main(void* arg) {
-  grpc_end2end_proxy* proxy = (grpc_end2end_proxy*)arg;
+  grpc_end2end_proxy* proxy = static_cast<grpc_end2end_proxy*>(arg);
   closure* cl;
   for (;;) {
     grpc_event ev = grpc_completion_queue_next(
@@ -424,7 +424,7 @@
       case GRPC_QUEUE_SHUTDOWN:
         return;
       case GRPC_OP_COMPLETE:
-        cl = (closure*)ev.tag;
+        cl = static_cast<closure*>(ev.tag);
         cl->func(cl->arg, ev.success);
         gpr_free(cl);
         break;
diff --git a/test/core/end2end/fuzzers/api_fuzzer.cc b/test/core/end2end/fuzzers/api_fuzzer.cc
index 14c1555..fa50c24 100644
--- a/test/core/end2end/fuzzers/api_fuzzer.cc
+++ b/test/core/end2end/fuzzers/api_fuzzer.cc
@@ -93,7 +93,7 @@
       cap = GPR_MAX(3 * cap / 2, cap + 8);
       str = static_cast<char*>(gpr_realloc(str, cap));
     }
-    c = (char)next_byte(inp);
+    c = static_cast<char>(next_byte(inp));
     str[sz++] = c;
   } while (c != 0 && c != 1);
   if (special != nullptr) {
@@ -116,7 +116,7 @@
   }
   *buffer = static_cast<char*>(gpr_malloc(*length));
   for (size_t i = 0; i < *length; i++) {
-    (*buffer)[i] = (char)next_byte(inp);
+    (*buffer)[i] = static_cast<char>(next_byte(inp));
   }
 }
 
@@ -192,7 +192,7 @@
   return out;
 }
 
-static int read_int(input_stream* inp) { return (int)read_uint32(inp); }
+static int read_int(input_stream* inp) { return static_cast<int>(read_uint32(inp)); }
 
 static grpc_channel_args* read_args(input_stream* inp) {
   size_t n = next_byte(inp);
@@ -529,10 +529,10 @@
 
 static void assert_success_and_decrement(void* counter, bool success) {
   GPR_ASSERT(success);
-  --*(int*)counter;
+  --*static_cast<int*>(counter);
 }
 
-static void decrement(void* counter, bool success) { --*(int*)counter; }
+static void decrement(void* counter, bool success) { --*static_cast<int*>(counter); }
 
 typedef struct connectivity_watch {
   int* counter;
diff --git a/test/core/end2end/fuzzers/client_fuzzer.cc b/test/core/end2end/fuzzers/client_fuzzer.cc
index c17d581..16acf8e 100644
--- a/test/core/end2end/fuzzers/client_fuzzer.cc
+++ b/test/core/end2end/fuzzers/client_fuzzer.cc
@@ -33,7 +33,7 @@
 
 static void discard_write(grpc_slice slice) {}
 
-static void* tag(int n) { return (void*)(uintptr_t)n; }
+static void* tag(int n) { return (void*)static_cast<uintptr_t>(n); }
 
 static void dont_log(gpr_log_func_args* args) {}
 
diff --git a/test/core/end2end/fuzzers/server_fuzzer.cc b/test/core/end2end/fuzzers/server_fuzzer.cc
index 61c55e0..5eb83ed 100644
--- a/test/core/end2end/fuzzers/server_fuzzer.cc
+++ b/test/core/end2end/fuzzers/server_fuzzer.cc
@@ -30,8 +30,8 @@
 
 static void discard_write(grpc_slice slice) {}
 
-static void* tag(int n) { return (void*)(uintptr_t)n; }
-static int detag(void* p) { return (int)(uintptr_t)p; }
+static void* tag(int n) { return (void*)static_cast<uintptr_t>(n); }
+static int detag(void* p) { return static_cast<int>((uintptr_t)p); }
 
 static void dont_log(gpr_log_func_args* args) {}
 
diff --git a/test/core/end2end/goaway_server_test.cc b/test/core/end2end/goaway_server_test.cc
index f23d87e..20468ad 100644
--- a/test/core/end2end/goaway_server_test.cc
+++ b/test/core/end2end/goaway_server_test.cc
@@ -77,10 +77,10 @@
     (*addrs)->addrs = static_cast<grpc_resolved_address*>(
         gpr_malloc(sizeof(*(*addrs)->addrs)));
     memset((*addrs)->addrs, 0, sizeof(*(*addrs)->addrs));
-    struct sockaddr_in* sa = (struct sockaddr_in*)(*addrs)->addrs[0].addr;
+    struct sockaddr_in* sa = reinterpret_cast<struct sockaddr_in*>((*addrs)->addrs[0].addr);
     sa->sin_family = AF_INET;
     sa->sin_addr.s_addr = htonl(0x7f000001);
-    sa->sin_port = htons((uint16_t)g_resolve_port);
+    sa->sin_port = htons(static_cast<uint16_t>(g_resolve_port));
     (*addrs)->addrs[0].len = sizeof(*sa);
     gpr_mu_unlock(&g_mu);
   }
@@ -109,7 +109,7 @@
         gpr_zalloc(sizeof(struct sockaddr_in)));
     sa->sin_family = AF_INET;
     sa->sin_addr.s_addr = htonl(0x7f000001);
-    sa->sin_port = htons((uint16_t)g_resolve_port);
+    sa->sin_port = htons(static_cast<uint16_t>(g_resolve_port));
     grpc_lb_addresses_set_address(*lb_addrs, 0, sa, sizeof(*sa), false, nullptr,
                                   nullptr);
     gpr_free(sa);
diff --git a/test/core/end2end/h2_ssl_cert_test.cc b/test/core/end2end/h2_ssl_cert_test.cc
index cd62c3f..b4b3462 100644
--- a/test/core/end2end/h2_ssl_cert_test.cc
+++ b/test/core/end2end/h2_ssl_cert_test.cc
@@ -333,7 +333,7 @@
   op->flags = GRPC_INITIAL_METADATA_WAIT_FOR_READY;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(1), expected_result == SUCCESS);
diff --git a/test/core/end2end/invalid_call_argument_test.cc b/test/core/end2end/invalid_call_argument_test.cc
index d2b26e7..6cb2e3e 100644
--- a/test/core/end2end/invalid_call_argument_test.cc
+++ b/test/core/end2end/invalid_call_argument_test.cc
@@ -209,7 +209,7 @@
 
   op = g_state.ops;
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
-  op->data.send_initial_metadata.count = (size_t)INT_MAX + 1;
+  op->data.send_initial_metadata.count = static_cast<size_t>(INT_MAX) + 1;
   op->flags = 0;
   op->reserved = nullptr;
   op++;
@@ -499,7 +499,7 @@
   op = g_state.ops;
   op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
   op->data.send_status_from_server.trailing_metadata_count =
-      (size_t)INT_MAX + 1;
+      static_cast<size_t>(INT_MAX) + 1;
   op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
   grpc_slice status_details = grpc_slice_from_static_string("xyz");
   op->data.send_status_from_server.status_details = &status_details;
diff --git a/test/core/end2end/tests/authority_not_supported.cc b/test/core/end2end/tests/authority_not_supported.cc
index f2852f7..498fb5c 100644
--- a/test/core/end2end/tests/authority_not_supported.cc
+++ b/test/core/end2end/tests/authority_not_supported.cc
@@ -154,7 +154,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
diff --git a/test/core/end2end/tests/bad_hostname.cc b/test/core/end2end/tests/bad_hostname.cc
index 63bfd76..60097df 100644
--- a/test/core/end2end/tests/bad_hostname.cc
+++ b/test/core/end2end/tests/bad_hostname.cc
@@ -133,7 +133,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
diff --git a/test/core/end2end/tests/bad_ping.cc b/test/core/end2end/tests/bad_ping.cc
index 672c2f4..0972e86 100644
--- a/test/core/end2end/tests/bad_ping.cc
+++ b/test/core/end2end/tests/bad_ping.cc
@@ -144,7 +144,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -188,7 +188,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
diff --git a/test/core/end2end/tests/binary_metadata.cc b/test/core/end2end/tests/binary_metadata.cc
index 8a0d667..1313ca4 100644
--- a/test/core/end2end/tests/binary_metadata.cc
+++ b/test/core/end2end/tests/binary_metadata.cc
@@ -182,7 +182,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -205,7 +205,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -246,7 +246,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
diff --git a/test/core/end2end/tests/call_creds.cc b/test/core/end2end/tests/call_creds.cc
index 968dab1..cb65b18 100644
--- a/test/core/end2end/tests/call_creds.cc
+++ b/test/core/end2end/tests/call_creds.cc
@@ -219,7 +219,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -253,7 +253,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -279,7 +279,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
@@ -443,7 +443,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(error == GRPC_CALL_OK);
 
   CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
diff --git a/test/core/end2end/tests/cancel_after_accept.cc b/test/core/end2end/tests/cancel_after_accept.cc
index 11bf4e7..86c91c1 100644
--- a/test/core/end2end/tests/cancel_after_accept.cc
+++ b/test/core/end2end/tests/cancel_after_accept.cc
@@ -186,7 +186,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error = grpc_server_request_call(f.server, &s, &call_details,
@@ -217,7 +217,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(3), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(3), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   GPR_ASSERT(GRPC_CALL_OK == mode.initiate_cancel(c, nullptr));
diff --git a/test/core/end2end/tests/cancel_after_client_done.cc b/test/core/end2end/tests/cancel_after_client_done.cc
index b0702b7..9e92c27 100644
--- a/test/core/end2end/tests/cancel_after_client_done.cc
+++ b/test/core/end2end/tests/cancel_after_client_done.cc
@@ -164,7 +164,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error = grpc_server_request_call(f.server, &s, &call_details,
@@ -195,7 +195,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(3), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(3), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   GPR_ASSERT(GRPC_CALL_OK == mode.initiate_cancel(c, nullptr));
diff --git a/test/core/end2end/tests/cancel_after_round_trip.cc b/test/core/end2end/tests/cancel_after_round_trip.cc
index 63e6505..88aa63c 100644
--- a/test/core/end2end/tests/cancel_after_round_trip.cc
+++ b/test/core/end2end/tests/cancel_after_round_trip.cc
@@ -181,7 +181,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -208,7 +208,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -234,7 +234,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(2), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   GPR_ASSERT(GRPC_CALL_OK == mode.initiate_cancel(c, nullptr));
@@ -251,7 +251,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(2), 1);
diff --git a/test/core/end2end/tests/compressed_payload.cc b/test/core/end2end/tests/compressed_payload.cc
index 63bf472..0879d72 100644
--- a/test/core/end2end/tests/compressed_payload.cc
+++ b/test/core/end2end/tests/compressed_payload.cc
@@ -187,7 +187,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(101), true);
@@ -205,7 +205,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), false);
@@ -216,7 +216,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(103), true);
@@ -338,7 +338,7 @@
     op->flags = client_send_flags_bitmask;
     op->reserved = nullptr;
     op++;
-    error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), nullptr);
+    error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(2), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
     CQ_EXPECT_COMPLETION(cqv, tag(2), true);
   }
@@ -367,7 +367,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -403,7 +403,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(101), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(101), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   for (int i = 0; i < 2; i++) {
@@ -419,7 +419,7 @@
       op->reserved = nullptr;
       op++;
       error =
-          grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), nullptr);
+          grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(2), nullptr);
       GPR_ASSERT(GRPC_CALL_OK == error);
       CQ_EXPECT_COMPLETION(cqv, tag(2), 1);
     }
@@ -432,7 +432,7 @@
     op->reserved = nullptr;
     op++;
     error =
-        grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+        grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
 
     CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -451,7 +451,7 @@
     op->reserved = nullptr;
     op++;
     error =
-        grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+        grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
 
     memset(ops, 0, sizeof(ops));
@@ -461,7 +461,7 @@
     op->flags = 0;
     op->reserved = nullptr;
     op++;
-    error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(3), nullptr);
+    error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(3), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
 
     CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
@@ -495,7 +495,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(4), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(4), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   memset(ops, 0, sizeof(ops));
@@ -508,7 +508,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(104), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(104), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
diff --git a/test/core/end2end/tests/connectivity.cc b/test/core/end2end/tests/connectivity.cc
index da65080..56e5189 100644
--- a/test/core/end2end/tests/connectivity.cc
+++ b/test/core/end2end/tests/connectivity.cc
@@ -34,7 +34,7 @@
 } child_events;
 
 static void child_thread(void* arg) {
-  child_events* ce = (child_events*)arg;
+  child_events* ce = static_cast<child_events*>(arg);
   grpc_event ev;
   gpr_event_set(&ce->started, (void*)1);
   gpr_log(GPR_DEBUG, "verifying");
diff --git a/test/core/end2end/tests/default_host.cc b/test/core/end2end/tests/default_host.cc
index 33be5f1..fefb5a5 100644
--- a/test/core/end2end/tests/default_host.cc
+++ b/test/core/end2end/tests/default_host.cc
@@ -140,7 +140,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(error == GRPC_CALL_OK);
 
   error =
@@ -179,7 +179,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(error == GRPC_CALL_OK);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
diff --git a/test/core/end2end/tests/disappearing_server.cc b/test/core/end2end/tests/disappearing_server.cc
index 1b2f729..9712b9f 100644
--- a/test/core/end2end/tests/disappearing_server.cc
+++ b/test/core/end2end/tests/disappearing_server.cc
@@ -120,7 +120,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -154,7 +154,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
diff --git a/test/core/end2end/tests/filter_call_init_fails.cc b/test/core/end2end/tests/filter_call_init_fails.cc
index f60a47f..c63a5b9 100644
--- a/test/core/end2end/tests/filter_call_init_fails.cc
+++ b/test/core/end2end/tests/filter_call_init_fails.cc
@@ -158,7 +158,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -253,7 +253,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
@@ -344,7 +344,7 @@
   op->reserved = nullptr;
   op++;
 
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
@@ -368,7 +368,7 @@
       nullptr);
   GPR_ASSERT(c);
 
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(2), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(2), 1);
diff --git a/test/core/end2end/tests/filter_causes_close.cc b/test/core/end2end/tests/filter_causes_close.cc
index 43f20d7..07543f8 100644
--- a/test/core/end2end/tests/filter_causes_close.cc
+++ b/test/core/end2end/tests/filter_causes_close.cc
@@ -152,7 +152,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -197,8 +197,8 @@
 } channel_data;
 
 static void recv_im_ready(void* arg, grpc_error* error) {
-  grpc_call_element* elem = (grpc_call_element*)arg;
-  call_data* calld = (call_data*)elem->call_data;
+  grpc_call_element* elem = static_cast<grpc_call_element*>(arg);
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   GRPC_CLOSURE_RUN(
       calld->recv_im_ready,
       grpc_error_set_int(GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
@@ -209,7 +209,7 @@
 
 static void start_transport_stream_op_batch(
     grpc_call_element* elem, grpc_transport_stream_op_batch* op) {
-  call_data* calld = (call_data*)elem->call_data;
+  call_data* calld = static_cast<call_data*>(elem->call_data);
   if (op->recv_initial_metadata) {
     calld->recv_im_ready =
         op->payload->recv_initial_metadata.recv_initial_metadata_ready;
diff --git a/test/core/end2end/tests/filter_latency.cc b/test/core/end2end/tests/filter_latency.cc
index d6cf3b0..42507ad 100644
--- a/test/core/end2end/tests/filter_latency.cc
+++ b/test/core/end2end/tests/filter_latency.cc
@@ -165,7 +165,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -196,7 +196,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -305,7 +305,7 @@
  */
 
 static bool maybe_add_filter(grpc_channel_stack_builder* builder, void* arg) {
-  grpc_channel_filter* filter = (grpc_channel_filter*)arg;
+  grpc_channel_filter* filter = static_cast<grpc_channel_filter*>(arg);
   if (g_enable_filter) {
     // Want to add the filter as close to the end as possible, to make
     // sure that all of the filters work well together.  However, we
diff --git a/test/core/end2end/tests/filter_status_code.cc b/test/core/end2end/tests/filter_status_code.cc
index ad80f23..389c63b 100644
--- a/test/core/end2end/tests/filter_status_code.cc
+++ b/test/core/end2end/tests/filter_status_code.cc
@@ -164,7 +164,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -199,7 +199,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -250,7 +250,7 @@
 
 static grpc_error* init_call_elem(grpc_call_element* elem,
                                   const grpc_call_element_args* args) {
-  final_status_data* data = (final_status_data*)elem->call_data;
+  final_status_data* data = static_cast<final_status_data*>(elem->call_data);
   data->call = args->call_stack;
   return GRPC_ERROR_NONE;
 }
@@ -258,7 +258,7 @@
 static void client_destroy_call_elem(grpc_call_element* elem,
                                      const grpc_call_final_info* final_info,
                                      grpc_closure* ignored) {
-  final_status_data* data = (final_status_data*)elem->call_data;
+  final_status_data* data = static_cast<final_status_data*>(elem->call_data);
   gpr_mu_lock(&g_mu);
   // Some fixtures, like proxies, will spawn intermidiate calls
   // We only want the results from our explicit calls
@@ -273,7 +273,7 @@
 static void server_destroy_call_elem(grpc_call_element* elem,
                                      const grpc_call_final_info* final_info,
                                      grpc_closure* ignored) {
-  final_status_data* data = (final_status_data*)elem->call_data;
+  final_status_data* data = static_cast<final_status_data*>(elem->call_data);
   gpr_mu_lock(&g_mu);
   // Some fixtures, like proxies, will spawn intermidiate calls
   // We only want the results from our explicit calls
@@ -323,7 +323,7 @@
  */
 
 static bool maybe_add_filter(grpc_channel_stack_builder* builder, void* arg) {
-  grpc_channel_filter* filter = (grpc_channel_filter*)arg;
+  grpc_channel_filter* filter = static_cast<grpc_channel_filter*>(arg);
   if (g_enable_filter) {
     // Want to add the filter as close to the end as possible, to make
     // sure that all of the filters work well together.  However, we
diff --git a/test/core/end2end/tests/graceful_server_shutdown.cc b/test/core/end2end/tests/graceful_server_shutdown.cc
index 3b6872b..9a14476 100644
--- a/test/core/end2end/tests/graceful_server_shutdown.cc
+++ b/test/core/end2end/tests/graceful_server_shutdown.cc
@@ -135,7 +135,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -169,7 +169,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
diff --git a/test/core/end2end/tests/high_initial_seqno.cc b/test/core/end2end/tests/high_initial_seqno.cc
index 989cd56..cb67787 100644
--- a/test/core/end2end/tests/high_initial_seqno.cc
+++ b/test/core/end2end/tests/high_initial_seqno.cc
@@ -139,7 +139,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -169,7 +169,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
diff --git a/test/core/end2end/tests/hpack_size.cc b/test/core/end2end/tests/hpack_size.cc
index 66b3a40..8f7f3e6 100644
--- a/test/core/end2end/tests/hpack_size.cc
+++ b/test/core/end2end/tests/hpack_size.cc
@@ -293,7 +293,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -323,7 +323,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
diff --git a/test/core/end2end/tests/idempotent_request.cc b/test/core/end2end/tests/idempotent_request.cc
index 578510d..c0eac68 100644
--- a/test/core/end2end/tests/idempotent_request.cc
+++ b/test/core/end2end/tests/idempotent_request.cc
@@ -144,7 +144,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -183,7 +183,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
diff --git a/test/core/end2end/tests/invoke_large_request.cc b/test/core/end2end/tests/invoke_large_request.cc
index b7afa97..5705094 100644
--- a/test/core/end2end/tests/invoke_large_request.cc
+++ b/test/core/end2end/tests/invoke_large_request.cc
@@ -176,7 +176,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -198,7 +198,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -224,7 +224,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
diff --git a/test/core/end2end/tests/keepalive_timeout.cc b/test/core/end2end/tests/keepalive_timeout.cc
index 0cdd12e..76beedb 100644
--- a/test/core/end2end/tests/keepalive_timeout.cc
+++ b/test/core/end2end/tests/keepalive_timeout.cc
@@ -155,7 +155,7 @@
   op->op = GRPC_OP_RECV_MESSAGE;
   op->data.recv_message.recv_message = &response_payload_recv;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(
@@ -172,7 +172,7 @@
   op->op = GRPC_OP_SEND_MESSAGE;
   op->data.send_message.send_message = response_payload;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -186,7 +186,7 @@
   op->data.recv_status_on_client.status = &status;
   op->data.recv_status_on_client.status_details = &details;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(3), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(3), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(3), 1);
diff --git a/test/core/end2end/tests/large_metadata.cc b/test/core/end2end/tests/large_metadata.cc
index c1343f9..5e04161 100644
--- a/test/core/end2end/tests/large_metadata.cc
+++ b/test/core/end2end/tests/large_metadata.cc
@@ -96,7 +96,7 @@
   grpc_arg arg;
   arg.type = GRPC_ARG_INTEGER;
   arg.key = const_cast<char*>(GRPC_ARG_MAX_METADATA_SIZE);
-  arg.value.integer = (int)large_size + 1024;
+  arg.value.integer = static_cast<int>(large_size) + 1024;
   grpc_channel_args args = {1, &arg};
   grpc_end2end_test_fixture f =
       begin_test(config, "test_request_with_large_metadata", &args, &args);
@@ -160,7 +160,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -184,7 +184,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -207,7 +207,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
diff --git a/test/core/end2end/tests/load_reporting_hook.cc b/test/core/end2end/tests/load_reporting_hook.cc
index cfe5814..de6b60c 100644
--- a/test/core/end2end/tests/load_reporting_hook.cc
+++ b/test/core/end2end/tests/load_reporting_hook.cc
@@ -185,7 +185,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -207,7 +207,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -235,7 +235,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
diff --git a/test/core/end2end/tests/max_concurrent_streams.cc b/test/core/end2end/tests/max_concurrent_streams.cc
index 642c0f7..ed658a3 100644
--- a/test/core/end2end/tests/max_concurrent_streams.cc
+++ b/test/core/end2end/tests/max_concurrent_streams.cc
@@ -135,7 +135,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -165,7 +165,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -274,7 +274,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c1, ops, (size_t)(op - ops), tag(301), nullptr);
+  error = grpc_call_start_batch(c1, ops, static_cast<size_t>(op - ops), tag(301), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   memset(ops, 0, sizeof(ops));
@@ -292,7 +292,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c1, ops, (size_t)(op - ops), tag(302), nullptr);
+  error = grpc_call_start_batch(c1, ops, static_cast<size_t>(op - ops), tag(302), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   memset(ops, 0, sizeof(ops));
@@ -306,7 +306,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c2, ops, (size_t)(op - ops), tag(401), nullptr);
+  error = grpc_call_start_batch(c2, ops, static_cast<size_t>(op - ops), tag(401), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   memset(ops, 0, sizeof(ops));
@@ -324,7 +324,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c2, ops, (size_t)(op - ops), tag(402), nullptr);
+  error = grpc_call_start_batch(c2, ops, static_cast<size_t>(op - ops), tag(402), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   got_client_start = 0;
@@ -345,7 +345,7 @@
        * both);
        * check this here */
       /* We'll get tag 303 or 403, we want 300, 400 */
-      live_call = ((int)(intptr_t)ev.tag) - 1;
+      live_call = (static_cast<int>((intptr_t)ev.tag)) - 1;
       got_client_start = 1;
     }
   }
@@ -371,7 +371,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s1, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s1, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -408,7 +408,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s2, ops, (size_t)(op - ops), tag(202), nullptr);
+  error = grpc_call_start_batch(s2, ops, static_cast<size_t>(op - ops), tag(202), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(live_call + 2), 1);
@@ -514,7 +514,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c1, ops, (size_t)(op - ops), tag(301), nullptr);
+  error = grpc_call_start_batch(c1, ops, static_cast<size_t>(op - ops), tag(301), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   memset(ops, 0, sizeof(ops));
@@ -532,7 +532,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c1, ops, (size_t)(op - ops), tag(302), nullptr);
+  error = grpc_call_start_batch(c1, ops, static_cast<size_t>(op - ops), tag(302), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(101), 1);
@@ -550,7 +550,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c2, ops, (size_t)(op - ops), tag(401), nullptr);
+  error = grpc_call_start_batch(c2, ops, static_cast<size_t>(op - ops), tag(401), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   memset(ops, 0, sizeof(ops));
@@ -568,7 +568,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c2, ops, (size_t)(op - ops), tag(402), nullptr);
+  error = grpc_call_start_batch(c2, ops, static_cast<size_t>(op - ops), tag(402), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   grpc_call_details_destroy(&call_details);
@@ -603,7 +603,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s2, ops, (size_t)(op - ops), tag(202), nullptr);
+  error = grpc_call_start_batch(s2, ops, static_cast<size_t>(op - ops), tag(202), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(402), 1);
@@ -709,7 +709,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c1, ops, (size_t)(op - ops), tag(301), nullptr);
+  error = grpc_call_start_batch(c1, ops, static_cast<size_t>(op - ops), tag(301), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   memset(ops, 0, sizeof(ops));
@@ -727,7 +727,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c1, ops, (size_t)(op - ops), tag(302), nullptr);
+  error = grpc_call_start_batch(c1, ops, static_cast<size_t>(op - ops), tag(302), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(101), 1);
@@ -745,7 +745,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c2, ops, (size_t)(op - ops), tag(401), nullptr);
+  error = grpc_call_start_batch(c2, ops, static_cast<size_t>(op - ops), tag(401), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   memset(ops, 0, sizeof(ops));
@@ -763,7 +763,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c2, ops, (size_t)(op - ops), tag(402), nullptr);
+  error = grpc_call_start_batch(c2, ops, static_cast<size_t>(op - ops), tag(402), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   /* the second request is time out*/
@@ -796,7 +796,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s1, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s1, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(302), 1);
diff --git a/test/core/end2end/tests/max_connection_age.cc b/test/core/end2end/tests/max_connection_age.cc
index df5fd5c..4b498e6 100644
--- a/test/core/end2end/tests/max_connection_age.cc
+++ b/test/core/end2end/tests/max_connection_age.cc
@@ -145,7 +145,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -156,7 +156,7 @@
   cq_verify(cqv);
 
   gpr_timespec expect_shutdown_time = grpc_timeout_milliseconds_to_deadline(
-      (int)(MAX_CONNECTION_AGE_MS * MAX_CONNECTION_AGE_JITTER_MULTIPLIER) +
+      static_cast<int>(MAX_CONNECTION_AGE_MS * MAX_CONNECTION_AGE_JITTER_MULTIPLIER) +
       MAX_CONNECTION_AGE_GRACE_MS + IMMEDIATE_SHUTDOWN_GRACE_TIME_MS);
 
   /* Wait for the channel to reach its max age */
@@ -190,7 +190,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
   CQ_EXPECT_COMPLETION(cqv, tag(102), true);
   cq_verify(cqv);
@@ -288,7 +288,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -325,7 +325,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), true);
diff --git a/test/core/end2end/tests/max_connection_idle.cc b/test/core/end2end/tests/max_connection_idle.cc
index 09b4a54..beff733 100644
--- a/test/core/end2end/tests/max_connection_idle.cc
+++ b/test/core/end2end/tests/max_connection_idle.cc
@@ -100,7 +100,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -139,7 +139,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
diff --git a/test/core/end2end/tests/max_message_length.cc b/test/core/end2end/tests/max_message_length.cc
index b1757a9..987c348 100644
--- a/test/core/end2end/tests/max_message_length.cc
+++ b/test/core/end2end/tests/max_message_length.cc
@@ -219,7 +219,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   if (send_limit) {
@@ -247,7 +247,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -408,7 +408,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -443,7 +443,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
diff --git a/test/core/end2end/tests/network_status_change.cc b/test/core/end2end/tests/network_status_change.cc
index 809f8ff..fe941e8 100644
--- a/test/core/end2end/tests/network_status_change.cc
+++ b/test/core/end2end/tests/network_status_change.cc
@@ -150,7 +150,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(
@@ -170,7 +170,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -193,7 +193,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
diff --git a/test/core/end2end/tests/no_logging.cc b/test/core/end2end/tests/no_logging.cc
index b4908d4..c4678f4 100644
--- a/test/core/end2end/tests/no_logging.cc
+++ b/test/core/end2end/tests/no_logging.cc
@@ -170,7 +170,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -207,7 +207,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
diff --git a/test/core/end2end/tests/payload.cc b/test/core/end2end/tests/payload.cc
index 3535d80..0e19e29 100644
--- a/test/core/end2end/tests/payload.cc
+++ b/test/core/end2end/tests/payload.cc
@@ -90,9 +90,9 @@
   static const char chars[] = "abcdefghijklmnopqrstuvwxyz1234567890";
   char* output;
   const size_t output_size = 1024 * 1024;
-  output = (char*)gpr_malloc(output_size);
+  output = static_cast<char*>(gpr_malloc(output_size));
   for (i = 0; i < output_size - 1; ++i) {
-    output[i] = chars[rand() % (int)(sizeof(chars) - 1)];
+    output[i] = chars[rand() % static_cast<int>(sizeof(chars) - 1)];
   }
   output[output_size - 1] = '\0';
   grpc_slice out = grpc_slice_from_copied_string(output);
@@ -174,7 +174,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -196,7 +196,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -222,7 +222,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
diff --git a/test/core/end2end/tests/ping_pong_streaming.cc b/test/core/end2end/tests/ping_pong_streaming.cc
index 714a768..9ac4d54 100644
--- a/test/core/end2end/tests/ping_pong_streaming.cc
+++ b/test/core/end2end/tests/ping_pong_streaming.cc
@@ -143,7 +143,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -165,7 +165,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(101), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(101), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   for (i = 0; i < messages; i++) {
@@ -184,7 +184,7 @@
     op->flags = 0;
     op->reserved = nullptr;
     op++;
-    error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), nullptr);
+    error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(2), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
 
     memset(ops, 0, sizeof(ops));
@@ -195,7 +195,7 @@
     op->reserved = nullptr;
     op++;
     error =
-        grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+        grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
     CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
     cq_verify(cqv);
@@ -208,7 +208,7 @@
     op->reserved = nullptr;
     op++;
     error =
-        grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+        grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
     CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
     CQ_EXPECT_COMPLETION(cqv, tag(2), 1);
@@ -229,7 +229,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(3), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(3), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   memset(ops, 0, sizeof(ops));
@@ -242,7 +242,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(104), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(104), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
diff --git a/test/core/end2end/tests/proxy_auth.cc b/test/core/end2end/tests/proxy_auth.cc
index c34505c..fd1cbad 100644
--- a/test/core/end2end/tests/proxy_auth.cc
+++ b/test/core/end2end/tests/proxy_auth.cc
@@ -148,7 +148,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -187,7 +187,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
diff --git a/test/core/end2end/tests/registered_call.cc b/test/core/end2end/tests/registered_call.cc
index d1c37dc..49a9f88 100644
--- a/test/core/end2end/tests/registered_call.cc
+++ b/test/core/end2end/tests/registered_call.cc
@@ -135,7 +135,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -165,7 +165,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
diff --git a/test/core/end2end/tests/request_with_flags.cc b/test/core/end2end/tests/request_with_flags.cc
index 4602313..bfce0a0 100644
--- a/test/core/end2end/tests/request_with_flags.cc
+++ b/test/core/end2end/tests/request_with_flags.cc
@@ -151,7 +151,7 @@
   op->reserved = nullptr;
   op++;
   expectation = call_start_batch_expected_result;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(expectation == error);
 
   if (expectation == GRPC_CALL_OK) {
diff --git a/test/core/end2end/tests/request_with_payload.cc b/test/core/end2end/tests/request_with_payload.cc
index 28818c8..fc87f58 100644
--- a/test/core/end2end/tests/request_with_payload.cc
+++ b/test/core/end2end/tests/request_with_payload.cc
@@ -147,7 +147,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(
@@ -168,7 +168,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -189,7 +189,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
diff --git a/test/core/end2end/tests/resource_quota_server.cc b/test/core/end2end/tests/resource_quota_server.cc
index 6d35d08..c9d8ab7 100644
--- a/test/core/end2end/tests/resource_quota_server.cc
+++ b/test/core/end2end/tests/resource_quota_server.cc
@@ -91,9 +91,9 @@
   static const char chars[] = "abcdefghijklmnopqrstuvwxyz1234567890";
   char* output;
   const size_t output_size = 1024 * 1024;
-  output = (char*)gpr_malloc(output_size);
+  output = static_cast<char*>(gpr_malloc(output_size));
   for (i = 0; i < output_size - 1; ++i) {
-    output[i] = chars[rand() % (int)(sizeof(chars) - 1)];
+    output[i] = chars[rand() % static_cast<int>(sizeof(chars) - 1)];
   }
   output[output_size - 1] = '\0';
   grpc_slice out = grpc_slice_from_copied_string(output);
@@ -132,25 +132,25 @@
   grpc_slice request_payload_slice = generate_random_slice();
 
   grpc_call** client_calls =
-      (grpc_call**)malloc(sizeof(grpc_call*) * NUM_CALLS);
+      static_cast<grpc_call**>(malloc(sizeof(grpc_call*) * NUM_CALLS));
   grpc_call** server_calls =
-      (grpc_call**)malloc(sizeof(grpc_call*) * NUM_CALLS);
+      static_cast<grpc_call**>(malloc(sizeof(grpc_call*) * NUM_CALLS));
   grpc_metadata_array* initial_metadata_recv =
-      (grpc_metadata_array*)malloc(sizeof(grpc_metadata_array) * NUM_CALLS);
+      static_cast<grpc_metadata_array*>(malloc(sizeof(grpc_metadata_array) * NUM_CALLS));
   grpc_metadata_array* trailing_metadata_recv =
-      (grpc_metadata_array*)malloc(sizeof(grpc_metadata_array) * NUM_CALLS);
+      static_cast<grpc_metadata_array*>(malloc(sizeof(grpc_metadata_array) * NUM_CALLS));
   grpc_metadata_array* request_metadata_recv =
-      (grpc_metadata_array*)malloc(sizeof(grpc_metadata_array) * NUM_CALLS);
+      static_cast<grpc_metadata_array*>(malloc(sizeof(grpc_metadata_array) * NUM_CALLS));
   grpc_call_details* call_details =
-      (grpc_call_details*)malloc(sizeof(grpc_call_details) * NUM_CALLS);
+      static_cast<grpc_call_details*>(malloc(sizeof(grpc_call_details) * NUM_CALLS));
   grpc_status_code* status =
-      (grpc_status_code*)malloc(sizeof(grpc_status_code) * NUM_CALLS);
-  grpc_slice* details = (grpc_slice*)malloc(sizeof(grpc_slice) * NUM_CALLS);
+      static_cast<grpc_status_code*>(malloc(sizeof(grpc_status_code) * NUM_CALLS));
+  grpc_slice* details = static_cast<grpc_slice*>(malloc(sizeof(grpc_slice) * NUM_CALLS));
   grpc_byte_buffer** request_payload =
-      (grpc_byte_buffer**)malloc(sizeof(grpc_byte_buffer*) * NUM_CALLS);
+      static_cast<grpc_byte_buffer**>(malloc(sizeof(grpc_byte_buffer*) * NUM_CALLS));
   grpc_byte_buffer** request_payload_recv =
-      (grpc_byte_buffer**)malloc(sizeof(grpc_byte_buffer*) * NUM_CALLS);
-  int* was_cancelled = (int*)malloc(sizeof(int) * NUM_CALLS);
+      static_cast<grpc_byte_buffer**>(malloc(sizeof(grpc_byte_buffer*) * NUM_CALLS));
+  int* was_cancelled = static_cast<int*>(malloc(sizeof(int) * NUM_CALLS));
   grpc_call_error error;
   int pending_client_calls = 0;
   int pending_server_start_calls = 0;
@@ -220,7 +220,7 @@
     op->flags = 0;
     op->reserved = nullptr;
     op++;
-    error = grpc_call_start_batch(client_calls[i], ops, (size_t)(op - ops),
+    error = grpc_call_start_batch(client_calls[i], ops, static_cast<size_t>(op - ops),
                                   tag(CLIENT_BASE_TAG + i), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
 
@@ -234,7 +234,7 @@
         grpc_completion_queue_next(f.cq, n_seconds_from_now(60), nullptr);
     GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
 
-    int ev_tag = (int)(intptr_t)ev.tag;
+    int ev_tag = static_cast<int>((intptr_t)ev.tag);
     if (ev_tag < CLIENT_BASE_TAG) {
       abort(); /* illegal tag */
     } else if (ev_tag < SERVER_START_BASE_TAG) {
@@ -286,7 +286,7 @@
       op->reserved = nullptr;
       op++;
       error =
-          grpc_call_start_batch(server_calls[call_id], ops, (size_t)(op - ops),
+          grpc_call_start_batch(server_calls[call_id], ops, static_cast<size_t>(op - ops),
                                 tag(SERVER_RECV_BASE_TAG + call_id), nullptr);
       GPR_ASSERT(GRPC_CALL_OK == error);
 
@@ -327,7 +327,7 @@
       op->reserved = nullptr;
       op++;
       error =
-          grpc_call_start_batch(server_calls[call_id], ops, (size_t)(op - ops),
+          grpc_call_start_batch(server_calls[call_id], ops, static_cast<size_t>(op - ops),
                                 tag(SERVER_END_BASE_TAG + call_id), nullptr);
       GPR_ASSERT(GRPC_CALL_OK == error);
 
diff --git a/test/core/end2end/tests/server_finishes_request.cc b/test/core/end2end/tests/server_finishes_request.cc
index f135851..4423ed3 100644
--- a/test/core/end2end/tests/server_finishes_request.cc
+++ b/test/core/end2end/tests/server_finishes_request.cc
@@ -133,7 +133,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -163,7 +163,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
diff --git a/test/core/end2end/tests/shutdown_finishes_calls.cc b/test/core/end2end/tests/shutdown_finishes_calls.cc
index 2e19e05..bdba7a6 100644
--- a/test/core/end2end/tests/shutdown_finishes_calls.cc
+++ b/test/core/end2end/tests/shutdown_finishes_calls.cc
@@ -128,7 +128,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -145,7 +145,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   /* shutdown and destroy the server */
diff --git a/test/core/end2end/tests/shutdown_finishes_tags.cc b/test/core/end2end/tests/shutdown_finishes_tags.cc
index d160647..55caacb 100644
--- a/test/core/end2end/tests/shutdown_finishes_tags.cc
+++ b/test/core/end2end/tests/shutdown_finishes_tags.cc
@@ -77,7 +77,7 @@
   grpc_end2end_test_fixture f = begin_test(
       config, "test_early_server_shutdown_finishes_tags", nullptr, nullptr);
   cq_verifier* cqv = cq_verifier_create(f.cq);
-  grpc_call* s = (grpc_call*)(uintptr_t)1;
+  grpc_call* s = (grpc_call*)static_cast<uintptr_t>(1);
   grpc_call_details call_details;
   grpc_metadata_array request_metadata_recv;
 
diff --git a/test/core/end2end/tests/simple_cacheable_request.cc b/test/core/end2end/tests/simple_cacheable_request.cc
index b4732ae..d7be887 100644
--- a/test/core/end2end/tests/simple_cacheable_request.cc
+++ b/test/core/end2end/tests/simple_cacheable_request.cc
@@ -178,7 +178,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -201,7 +201,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -227,7 +227,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
diff --git a/test/core/end2end/tests/simple_delayed_request.cc b/test/core/end2end/tests/simple_delayed_request.cc
index 54517fb..12207f0 100644
--- a/test/core/end2end/tests/simple_delayed_request.cc
+++ b/test/core/end2end/tests/simple_delayed_request.cc
@@ -129,7 +129,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -159,7 +159,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
diff --git a/test/core/end2end/tests/simple_metadata.cc b/test/core/end2end/tests/simple_metadata.cc
index 5911834..246c8b0 100644
--- a/test/core/end2end/tests/simple_metadata.cc
+++ b/test/core/end2end/tests/simple_metadata.cc
@@ -176,7 +176,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -199,7 +199,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -225,7 +225,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
diff --git a/test/core/end2end/tests/simple_request.cc b/test/core/end2end/tests/simple_request.cc
index 6ec4a14..8bc7fa6 100644
--- a/test/core/end2end/tests/simple_request.cc
+++ b/test/core/end2end/tests/simple_request.cc
@@ -152,7 +152,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -191,7 +191,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
diff --git a/test/core/end2end/tests/stream_compression_compressed_payload.cc b/test/core/end2end/tests/stream_compression_compressed_payload.cc
index 637b7b2..4dea64e 100644
--- a/test/core/end2end/tests/stream_compression_compressed_payload.cc
+++ b/test/core/end2end/tests/stream_compression_compressed_payload.cc
@@ -187,7 +187,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(101), true);
@@ -205,7 +205,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), false);
@@ -216,7 +216,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(103), true);
@@ -345,7 +345,7 @@
     op->flags = client_send_flags_bitmask;
     op->reserved = nullptr;
     op++;
-    error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), nullptr);
+    error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(2), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
     CQ_EXPECT_COMPLETION(cqv, tag(2), true);
   }
@@ -374,7 +374,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -414,7 +414,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(101), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(101), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   for (int i = 0; i < 2; i++) {
@@ -430,7 +430,7 @@
       op->reserved = nullptr;
       op++;
       error =
-          grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), nullptr);
+          grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(2), nullptr);
       GPR_ASSERT(GRPC_CALL_OK == error);
       CQ_EXPECT_COMPLETION(cqv, tag(2), 1);
     }
@@ -443,7 +443,7 @@
     op->reserved = nullptr;
     op++;
     error =
-        grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+        grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
 
     CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -460,7 +460,7 @@
     op->reserved = nullptr;
     op++;
     error =
-        grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+        grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
 
     memset(ops, 0, sizeof(ops));
@@ -470,7 +470,7 @@
     op->flags = 0;
     op->reserved = nullptr;
     op++;
-    error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(3), nullptr);
+    error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(3), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
 
     CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
@@ -495,7 +495,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(4), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(4), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   memset(ops, 0, sizeof(ops));
@@ -508,7 +508,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(104), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(104), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
diff --git a/test/core/end2end/tests/stream_compression_payload.cc b/test/core/end2end/tests/stream_compression_payload.cc
index 6abb3bb..f11230f 100644
--- a/test/core/end2end/tests/stream_compression_payload.cc
+++ b/test/core/end2end/tests/stream_compression_payload.cc
@@ -93,9 +93,9 @@
   static const char chars[] = "abcdefghijklmnopqrstuvwxyz1234567890";
   char* output;
   const size_t output_size = 1024 * 1024;
-  output = (char*)gpr_malloc(output_size);
+  output = static_cast<char*>(gpr_malloc(output_size));
   for (i = 0; i < output_size - 1; ++i) {
-    output[i] = chars[rand() % (int)(sizeof(chars) - 1)];
+    output[i] = chars[rand() % static_cast<int>(sizeof(chars) - 1)];
   }
   output[output_size - 1] = '\0';
   grpc_slice out = grpc_slice_from_copied_string(output);
@@ -177,7 +177,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -199,7 +199,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -225,7 +225,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
diff --git a/test/core/end2end/tests/stream_compression_ping_pong_streaming.cc b/test/core/end2end/tests/stream_compression_ping_pong_streaming.cc
index 8242c2c..6f57667 100644
--- a/test/core/end2end/tests/stream_compression_ping_pong_streaming.cc
+++ b/test/core/end2end/tests/stream_compression_ping_pong_streaming.cc
@@ -151,7 +151,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -173,7 +173,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(101), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(101), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   for (i = 0; i < messages; i++) {
@@ -192,7 +192,7 @@
     op->flags = 0;
     op->reserved = nullptr;
     op++;
-    error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), nullptr);
+    error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(2), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
 
     memset(ops, 0, sizeof(ops));
@@ -203,7 +203,7 @@
     op->reserved = nullptr;
     op++;
     error =
-        grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+        grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
     CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
     cq_verify(cqv);
@@ -216,7 +216,7 @@
     op->reserved = nullptr;
     op++;
     error =
-        grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+        grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
     CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
     CQ_EXPECT_COMPLETION(cqv, tag(2), 1);
@@ -237,7 +237,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(3), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(3), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   memset(ops, 0, sizeof(ops));
@@ -250,7 +250,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(104), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(104), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
diff --git a/test/core/end2end/tests/streaming_error_response.cc b/test/core/end2end/tests/streaming_error_response.cc
index 167530a..e679205 100644
--- a/test/core/end2end/tests/streaming_error_response.cc
+++ b/test/core/end2end/tests/streaming_error_response.cc
@@ -148,7 +148,7 @@
     op->data.recv_status_on_client.status_details = &details;
     op++;
   }
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(
@@ -165,7 +165,7 @@
   op->op = GRPC_OP_SEND_MESSAGE;
   op->data.send_message.send_message = response_payload1;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -179,7 +179,7 @@
   op->op = GRPC_OP_SEND_MESSAGE;
   op->data.send_message.send_message = response_payload2;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
@@ -190,7 +190,7 @@
     op->op = GRPC_OP_RECV_MESSAGE;
     op->data.recv_message.recv_message = &response_payload2_recv;
     op++;
-    error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), nullptr);
+    error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(2), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
 
     CQ_EXPECT_COMPLETION(cqv, tag(2), 1);
@@ -208,7 +208,7 @@
   grpc_slice status_details = grpc_slice_from_static_string("xyz");
   op->data.send_status_from_server.status_details = &status_details;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(104), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(104), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(104), 1);
@@ -225,7 +225,7 @@
     op->data.recv_status_on_client.status = &status;
     op->data.recv_status_on_client.status_details = &details;
     op++;
-    error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(3), nullptr);
+    error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(3), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
 
     CQ_EXPECT_COMPLETION(cqv, tag(3), 1);
diff --git a/test/core/end2end/tests/trailing_metadata.cc b/test/core/end2end/tests/trailing_metadata.cc
index 150c1cb..134baaa 100644
--- a/test/core/end2end/tests/trailing_metadata.cc
+++ b/test/core/end2end/tests/trailing_metadata.cc
@@ -184,7 +184,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -207,7 +207,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
@@ -234,7 +234,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
diff --git a/test/core/end2end/tests/workaround_cronet_compression.cc b/test/core/end2end/tests/workaround_cronet_compression.cc
index edf03d8..3de326b 100644
--- a/test/core/end2end/tests/workaround_cronet_compression.cc
+++ b/test/core/end2end/tests/workaround_cronet_compression.cc
@@ -191,7 +191,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   error =
@@ -227,7 +227,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(101), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(101), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   for (int i = 0; i < 2; i++) {
@@ -246,7 +246,7 @@
     op->flags = 0;
     op->reserved = nullptr;
     op++;
-    error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), nullptr);
+    error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(2), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
 
     memset(ops, 0, sizeof(ops));
@@ -257,7 +257,7 @@
     op->reserved = nullptr;
     op++;
     error =
-        grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+        grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
     CQ_EXPECT_COMPLETION(cqv, tag(102), 1);
     cq_verify(cqv);
@@ -275,7 +275,7 @@
     op->reserved = nullptr;
     op++;
     error =
-        grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+        grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
     GPR_ASSERT(GRPC_CALL_OK == error);
     CQ_EXPECT_COMPLETION(cqv, tag(103), 1);
     CQ_EXPECT_COMPLETION(cqv, tag(2), 1);
@@ -308,7 +308,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(3), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(3), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   memset(ops, 0, sizeof(ops));
@@ -321,7 +321,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(104), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(104), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(1), 1);
diff --git a/test/core/end2end/tests/write_buffering.cc b/test/core/end2end/tests/write_buffering.cc
index 7f3d1ab..35ab72c 100644
--- a/test/core/end2end/tests/write_buffering.cc
+++ b/test/core/end2end/tests/write_buffering.cc
@@ -128,7 +128,7 @@
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   memset(ops, 0, sizeof(ops));
@@ -138,7 +138,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(2), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(
@@ -154,7 +154,7 @@
   op->data.send_message.send_message = request_payload1;
   op->flags = GRPC_WRITE_BUFFER_HINT;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(3), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(3), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   memset(ops, 0, sizeof(ops));
@@ -162,7 +162,7 @@
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   /* recv message should not succeed yet - it's buffered at the client still */
@@ -171,7 +171,7 @@
   op->op = GRPC_OP_RECV_MESSAGE;
   op->data.recv_message.recv_message = &request_payload_recv1;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(2), true);
@@ -186,7 +186,7 @@
   op->data.send_message.send_message = request_payload2;
   op->flags = 0;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(4), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(4), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   /* now the first send should match up with the first recv */
@@ -200,7 +200,7 @@
   op->op = GRPC_OP_RECV_MESSAGE;
   op->data.recv_message.recv_message = &request_payload_recv2;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(104), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(104), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(104), true);
@@ -219,7 +219,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(4), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(4), nullptr);
 
   memset(ops, 0, sizeof(ops));
   op = ops;
@@ -236,7 +236,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(105), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(105), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(105), 1);
diff --git a/test/core/end2end/tests/write_buffering_at_end.cc b/test/core/end2end/tests/write_buffering_at_end.cc
index a1fbfef..fffb029 100644
--- a/test/core/end2end/tests/write_buffering_at_end.cc
+++ b/test/core/end2end/tests/write_buffering_at_end.cc
@@ -125,7 +125,7 @@
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(1), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   memset(ops, 0, sizeof(ops));
@@ -135,7 +135,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(2), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(2), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   GPR_ASSERT(GRPC_CALL_OK == grpc_server_request_call(
@@ -151,7 +151,7 @@
   op->data.send_message.send_message = request_payload;
   op->flags = GRPC_WRITE_BUFFER_HINT;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(3), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(3), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   memset(ops, 0, sizeof(ops));
@@ -159,7 +159,7 @@
   op->op = GRPC_OP_SEND_INITIAL_METADATA;
   op->data.send_initial_metadata.count = 0;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(102), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   /* recv message should not succeed yet - it's buffered at the client still */
@@ -168,7 +168,7 @@
   op->op = GRPC_OP_RECV_MESSAGE;
   op->data.recv_message.recv_message = &request_payload_recv1;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(103), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(103), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(2), true);
@@ -181,7 +181,7 @@
   op = ops;
   op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(4), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(4), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   /* now the first send should match up with the first recv */
@@ -195,7 +195,7 @@
   op->op = GRPC_OP_RECV_MESSAGE;
   op->data.recv_message.recv_message = &request_payload_recv2;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(104), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(104), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(104), true);
@@ -210,7 +210,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(4), nullptr);
+  error = grpc_call_start_batch(c, ops, static_cast<size_t>(op - ops), tag(4), nullptr);
 
   memset(ops, 0, sizeof(ops));
   op = ops;
@@ -227,7 +227,7 @@
   op->flags = 0;
   op->reserved = nullptr;
   op++;
-  error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(105), nullptr);
+  error = grpc_call_start_batch(s, ops, static_cast<size_t>(op - ops), tag(105), nullptr);
   GPR_ASSERT(GRPC_CALL_OK == error);
 
   CQ_EXPECT_COMPLETION(cqv, tag(105), 1);