diff --git a/test/cpp/end2end/async_end2end_test.cc b/test/cpp/end2end/async_end2end_test.cc
index cfb6c21..74290c3 100644
--- a/test/cpp/end2end/async_end2end_test.cc
+++ b/test/cpp/end2end/async_end2end_test.cc
@@ -199,7 +199,7 @@
 
   void ResetStub() {
     std::shared_ptr<Channel> channel =
-        CreateChannel(server_address_.str(), InsecureCredentials());
+        CreateChannel(server_address_.str(), InsecureChannelCredentials());
     stub_ = grpc::cpp::test::util::TestService::NewStub(channel);
   }
 
@@ -749,7 +749,7 @@
 
 TEST_P(AsyncEnd2endTest, UnimplementedRpc) {
   std::shared_ptr<Channel> channel =
-      CreateChannel(server_address_.str(), InsecureCredentials());
+      CreateChannel(server_address_.str(), InsecureChannelCredentials());
   std::unique_ptr<grpc::cpp::test::util::UnimplementedService::Stub> stub;
   stub = grpc::cpp::test::util::UnimplementedService::NewStub(channel);
   EchoRequest send_request;
diff --git a/test/cpp/end2end/client_crash_test.cc b/test/cpp/end2end/client_crash_test.cc
index 058e696..116785b 100644
--- a/test/cpp/end2end/client_crash_test.cc
+++ b/test/cpp/end2end/client_crash_test.cc
@@ -74,7 +74,7 @@
     }));
     GPR_ASSERT(server_);
     return grpc::cpp::test::util::TestService::NewStub(
-        CreateChannel(addr, InsecureCredentials()));
+        CreateChannel(addr, InsecureChannelCredentials()));
   }
 
   void KillServer() { server_.reset(); }
diff --git a/test/cpp/end2end/end2end_test.cc b/test/cpp/end2end/end2end_test.cc
index 89a556c..ef605de 100644
--- a/test/cpp/end2end/end2end_test.cc
+++ b/test/cpp/end2end/end2end_test.cc
@@ -146,13 +146,13 @@
 
   TestAuthMetadataProcessor(bool is_blocking) : is_blocking_(is_blocking) {}
 
-  std::shared_ptr<Credentials> GetCompatibleClientCreds() {
+  std::shared_ptr<CallCredentials> GetCompatibleClientCreds() {
     return MetadataCredentialsFromPlugin(
         std::unique_ptr<MetadataCredentialsPlugin>(
             new TestMetadataCredentialsPlugin(kGoodGuy, is_blocking_, true)));
   }
 
-  std::shared_ptr<Credentials> GetIncompatibleClientCreds() {
+  std::shared_ptr<CallCredentials> GetIncompatibleClientCreds() {
     return MetadataCredentialsFromPlugin(
         std::unique_ptr<MetadataCredentialsPlugin>(
             new TestMetadataCredentialsPlugin("Mr Hyde", is_blocking_, true)));
@@ -407,7 +407,7 @@
     }
     EXPECT_TRUE(is_server_started_);
     ChannelArguments args;
-    auto channel_creds = InsecureCredentials();
+    auto channel_creds = InsecureChannelCredentials();
     if (GetParam().use_tls) {
       SslCredentialsOptions ssl_opts = {test_root_cert, "", ""};
       args.SetSslTargetNameOverride("foo.test.google.fr");
@@ -429,7 +429,7 @@
       builder.RegisterService(proxy_service_.get());
       proxy_server_ = builder.BuildAndStart();
 
-      channel_ = CreateChannel(proxyaddr.str(), InsecureCredentials());
+      channel_ = CreateChannel(proxyaddr.str(), InsecureChannelCredentials());
     }
 
     stub_ = grpc::cpp::test::util::TestService::NewStub(channel_);
@@ -751,7 +751,8 @@
   std::ostringstream server_address;
   server_address << "127.0.0.1:" << port;
   // Channel to non-existing server
-  auto channel = CreateChannel(server_address.str(), InsecureCredentials());
+  auto channel =
+      CreateChannel(server_address.str(), InsecureChannelCredentials());
   // Start IDLE
   EXPECT_EQ(GRPC_CHANNEL_IDLE, channel->GetState(true));
 
@@ -971,33 +972,6 @@
   EXPECT_TRUE(s.ok());
 }
 
-// rpc and stream should fail on bad credentials.
-TEST_P(SecureEnd2endTest, BadCredentials) {
-  std::shared_ptr<Credentials> bad_creds = GoogleRefreshTokenCredentials("");
-  EXPECT_EQ(static_cast<Credentials*>(nullptr), bad_creds.get());
-  std::shared_ptr<Channel> channel =
-      CreateChannel(server_address_.str(), bad_creds);
-  std::unique_ptr<grpc::cpp::test::util::TestService::Stub> stub(
-      grpc::cpp::test::util::TestService::NewStub(channel));
-  EchoRequest request;
-  EchoResponse response;
-  ClientContext context;
-  request.set_message("Hello");
-
-  Status s = stub->Echo(&context, request, &response);
-  EXPECT_EQ("", response.message());
-  EXPECT_FALSE(s.ok());
-  EXPECT_EQ(StatusCode::INVALID_ARGUMENT, s.error_code());
-  EXPECT_EQ("Invalid credentials.", s.error_message());
-
-  ClientContext context2;
-  auto stream = stub->BidiStream(&context2);
-  s = stream->Finish();
-  EXPECT_FALSE(s.ok());
-  EXPECT_EQ(StatusCode::INVALID_ARGUMENT, s.error_code());
-  EXPECT_EQ("Invalid credentials.", s.error_message());
-}
-
 bool MetadataContains(
     const std::multimap<grpc::string_ref, grpc::string_ref>& metadata,
     const grpc::string& key, const grpc::string& value) {
@@ -1055,7 +1029,7 @@
   EchoRequest request;
   EchoResponse response;
   ClientContext context;
-  std::shared_ptr<Credentials> creds =
+  std::shared_ptr<CallCredentials> creds =
       GoogleIAMCredentials("fake_token", "fake_selector");
   context.set_credentials(creds);
   request.set_message("Hello");
@@ -1072,30 +1046,15 @@
                                "fake_selector"));
 }
 
-TEST_P(SecureEnd2endTest, InsecurePerCallCredentials) {
-  ResetStub();
-  EchoRequest request;
-  EchoResponse response;
-  ClientContext context;
-  std::shared_ptr<Credentials> creds = InsecureCredentials();
-  context.set_credentials(creds);
-  request.set_message("Hello");
-  request.mutable_param()->set_echo_metadata(true);
-
-  Status s = stub_->Echo(&context, request, &response);
-  EXPECT_EQ(StatusCode::CANCELLED, s.error_code());
-  EXPECT_EQ("Failed to set credentials to rpc.", s.error_message());
-}
-
 TEST_P(SecureEnd2endTest, OverridePerCallCredentials) {
   ResetStub();
   EchoRequest request;
   EchoResponse response;
   ClientContext context;
-  std::shared_ptr<Credentials> creds1 =
+  std::shared_ptr<CallCredentials> creds1 =
       GoogleIAMCredentials("fake_token1", "fake_selector1");
   context.set_credentials(creds1);
-  std::shared_ptr<Credentials> creds2 =
+  std::shared_ptr<CallCredentials> creds2 =
       GoogleIAMCredentials("fake_token2", "fake_selector2");
   context.set_credentials(creds2);
   request.set_message("Hello");
diff --git a/test/cpp/end2end/generic_end2end_test.cc b/test/cpp/end2end/generic_end2end_test.cc
index 6a46916..082119d 100644
--- a/test/cpp/end2end/generic_end2end_test.cc
+++ b/test/cpp/end2end/generic_end2end_test.cc
@@ -120,7 +120,7 @@
 
   void ResetStub() {
     std::shared_ptr<Channel> channel =
-        CreateChannel(server_address_.str(), InsecureCredentials());
+        CreateChannel(server_address_.str(), InsecureChannelCredentials());
     generic_stub_.reset(new GenericStub(channel));
   }
 
diff --git a/test/cpp/end2end/mock_test.cc b/test/cpp/end2end/mock_test.cc
index 9c35fed..a2a2f68 100644
--- a/test/cpp/end2end/mock_test.cc
+++ b/test/cpp/end2end/mock_test.cc
@@ -244,7 +244,7 @@
 
   void ResetStub() {
     std::shared_ptr<Channel> channel =
-        CreateChannel(server_address_.str(), InsecureCredentials());
+        CreateChannel(server_address_.str(), InsecureChannelCredentials());
     stub_ = grpc::cpp::test::util::TestService::NewStub(channel);
   }
 
diff --git a/test/cpp/end2end/server_crash_test_client.cc b/test/cpp/end2end/server_crash_test_client.cc
index 1786936..2baefcb 100644
--- a/test/cpp/end2end/server_crash_test_client.cc
+++ b/test/cpp/end2end/server_crash_test_client.cc
@@ -58,7 +58,7 @@
 int main(int argc, char** argv) {
   ParseCommandLineFlags(&argc, &argv, true);
   auto stub = grpc::cpp::test::util::TestService::NewStub(
-      grpc::CreateChannel(FLAGS_address, grpc::InsecureCredentials()));
+      grpc::CreateChannel(FLAGS_address, grpc::InsecureChannelCredentials()));
 
   EchoRequest request;
   EchoResponse response;
diff --git a/test/cpp/end2end/shutdown_test.cc b/test/cpp/end2end/shutdown_test.cc
index 0549bb8..b1b18b2 100644
--- a/test/cpp/end2end/shutdown_test.cc
+++ b/test/cpp/end2end/shutdown_test.cc
@@ -93,7 +93,7 @@
 
   void ResetStub() {
     string target = "dns:localhost:" + to_string(port_);
-    channel_ = CreateChannel(target, InsecureCredentials());
+    channel_ = CreateChannel(target, InsecureChannelCredentials());
     stub_ = grpc::cpp::test::util::TestService::NewStub(channel_);
   }
 
diff --git a/test/cpp/end2end/streaming_throughput_test.cc b/test/cpp/end2end/streaming_throughput_test.cc
index d4ab148..b7e103a 100644
--- a/test/cpp/end2end/streaming_throughput_test.cc
+++ b/test/cpp/end2end/streaming_throughput_test.cc
@@ -160,7 +160,7 @@
 
   void ResetStub() {
     std::shared_ptr<Channel> channel =
-        CreateChannel(server_address_.str(), InsecureCredentials());
+        CreateChannel(server_address_.str(), InsecureChannelCredentials());
     stub_ = grpc::cpp::test::util::TestService::NewStub(channel);
   }
 
diff --git a/test/cpp/end2end/thread_stress_test.cc b/test/cpp/end2end/thread_stress_test.cc
index 75a07d8..fb82b96 100644
--- a/test/cpp/end2end/thread_stress_test.cc
+++ b/test/cpp/end2end/thread_stress_test.cc
@@ -190,7 +190,7 @@
 
   void ResetStub() {
     std::shared_ptr<Channel> channel =
-        CreateChannel(server_address_.str(), InsecureCredentials());
+        CreateChannel(server_address_.str(), InsecureChannelCredentials());
     stub_ = grpc::cpp::test::util::TestService::NewStub(channel);
   }