diff --git a/src/objective-c/tests/GRPCClientTests.m b/src/objective-c/tests/GRPCClientTests.m
index 3210ad70502..103e5ca3d49 100644
--- a/src/objective-c/tests/GRPCClientTests.m
+++ b/src/objective-c/tests/GRPCClientTests.m
@@ -43,7 +43,8 @@
 // These are a few tests similar to InteropTests, but which use the generic gRPC client (GRPCCall)
 // rather than a generated proto library on top of it.
 
-static NSString * const kHostAddress = @"grpc-test.sandbox.google.com";
+// grpc-test.sandbox.google.com
+static NSString * const kHostAddress = @"http://localhost:5050";
 static NSString * const kPackage = @"grpc.testing";
 static NSString * const kService = @"TestService";
 
diff --git a/src/objective-c/tests/InteropTests.m b/src/objective-c/tests/InteropTests.m
index 501f33317a1..b473d73422f 100644
--- a/src/objective-c/tests/InteropTests.m
+++ b/src/objective-c/tests/InteropTests.m
@@ -83,8 +83,10 @@
   RMTTestService *_service;
 }
 
+// grpc-test.sandbox.google.com
+
 - (void)setUp {
-  _service = [[RMTTestService alloc] initWithHost:@"grpc-test.sandbox.google.com"];
+  _service = [[RMTTestService alloc] initWithHost:@"http://localhost:5050"];
 }
 
 // Tests as described here: https://github.com/grpc/grpc/blob/master/doc/interop-test-descriptions.md