diff --git a/doc/interop-test-descriptions.md b/doc/interop-test-descriptions.md
index 53cc47b..e618e96 100644
--- a/doc/interop-test-descriptions.md
+++ b/doc/interop-test-descriptions.md
@@ -471,7 +471,7 @@
 
 The test uses `--default_service_account` with GCE service account email and
 `--oauth_scope` with the OAuth scope to use. For testing against
-grpc-test.sandbox.google.com, "https://www.googleapis.com/auth/xapi.zoo" should
+grpc-test.sandbox.googleapis.com, "https://www.googleapis.com/auth/xapi.zoo" should
 be passed in as `--oauth_scope`.
 
 Server features:
@@ -568,7 +568,7 @@
 fetch the token, `--default_service_account` can be used to pass in GCE service
 account email.
 - uses the flag `--oauth_scope` for the oauth scope.  For testing against
-grpc-test.sandbox.google.com, "https://www.googleapis.com/auth/xapi.zoo" should
+grpc-test.sandbox.googleapis.com, "https://www.googleapis.com/auth/xapi.zoo" should
 be passed as the `--oauth_scope`.
 
 Server features:
@@ -610,7 +610,7 @@
 variable GOOGLE_APPLICATION_CREDENTIALS
 - optionally uses the flag `--oauth_scope` for the oauth scope if implementator 
 wishes to use service account credential instead of JWT credential. For testing
-against grpc-test.sandbox.google.com, oauth scope 
+against grpc-test.sandbox.googleapis.com, oauth scope 
 "https://www.googleapis.com/auth/xapi.zoo" should be used.
 
 Server features:
@@ -1033,7 +1033,7 @@
 with the scope of the method being invoked.
 
 Although a general server-side feature, most test servers won't implement this
-feature. The TLS server grpc-test.sandbox.google.com:443 supports this feature.
+feature. The TLS server grpc-test.sandbox.googleapis.com:443 supports this feature.
 It requires at least the OAuth scope
 `https://www.googleapis.com/auth/xapi.zoo` for authentication to succeed.
 
diff --git a/examples/objective-c/auth_sample/MakeRPCViewController.m b/examples/objective-c/auth_sample/MakeRPCViewController.m
index 4fd23dc..6013186 100644
--- a/examples/objective-c/auth_sample/MakeRPCViewController.m
+++ b/examples/objective-c/auth_sample/MakeRPCViewController.m
@@ -39,7 +39,7 @@
 
 NSString * const kTestScope = @"https://www.googleapis.com/auth/xapi.zoo";
 
-static NSString * const kTestHostAddress = @"grpc-test.sandbox.google.com";
+static NSString * const kTestHostAddress = @"grpc-test.sandbox.googleapis.com";
 
 // Category for RPC errors to create the descriptions as we want them to appear on our view.
 @interface NSError (AuthSample)
diff --git a/src/objective-c/examples/Sample/Sample/ViewController.m b/src/objective-c/examples/Sample/Sample/ViewController.m
index 3d634a3..433a8a2 100644
--- a/src/objective-c/examples/Sample/Sample/ViewController.m
+++ b/src/objective-c/examples/Sample/Sample/ViewController.m
@@ -45,7 +45,7 @@
 - (void)viewDidLoad {
   [super viewDidLoad];
 
-  NSString * const kRemoteHost = @"grpc-test.sandbox.google.com";
+  NSString * const kRemoteHost = @"grpc-test.sandbox.googleapis.com";
 
   RMTSimpleRequest *request = [[RMTSimpleRequest alloc] init];
   request.responseSize = 10;
diff --git a/src/objective-c/examples/SwiftSample/ViewController.swift b/src/objective-c/examples/SwiftSample/ViewController.swift
index 76dad9e..a21ce07 100644
--- a/src/objective-c/examples/SwiftSample/ViewController.swift
+++ b/src/objective-c/examples/SwiftSample/ViewController.swift
@@ -38,7 +38,7 @@
   override func viewDidLoad() {
     super.viewDidLoad()
 
-    let RemoteHost = "grpc-test.sandbox.google.com"
+    let RemoteHost = "grpc-test.sandbox.googleapis.com"
 
     let request = RMTSimpleRequest()
     request.responseSize = 10
diff --git a/src/objective-c/tests/InteropTestsRemote.m b/src/objective-c/tests/InteropTestsRemote.m
index a67be98..758cc93 100644
--- a/src/objective-c/tests/InteropTestsRemote.m
+++ b/src/objective-c/tests/InteropTestsRemote.m
@@ -35,7 +35,7 @@
 
 #import "InteropTests.h"
 
-static NSString * const kRemoteSSLHost = @"grpc-test.sandbox.google.com";
+static NSString * const kRemoteSSLHost = @"grpc-test.sandbox.googleapis.com";
 
 /** Tests in InteropTests.m, sending the RPCs to a remote SSL server. */
 @interface InteropTestsRemote : InteropTests
diff --git a/tools/run_tests/run_interop_tests.py b/tools/run_tests/run_interop_tests.py
index 10566d6..6ce618e 100755
--- a/tools/run_tests/run_interop_tests.py
+++ b/tools/run_tests/run_interop_tests.py
@@ -426,8 +426,8 @@
   """Creates jobspec for cloud-to-prod interop test"""
   container_name = None
   cmdargs = [
-      '--server_host_override=grpc-test.sandbox.google.com',
-      '--server_host=grpc-test.sandbox.google.com',
+      '--server_host_override=grpc-test.sandbox.googleapis.com',
+      '--server_host=grpc-test.sandbox.googleapis.com',
       '--server_port=443',
       '--use_tls=true',
       '--test_case=%s' % test_case]