diff --git a/test/cpp/end2end/end2end_test.cc b/test/cpp/end2end/end2end_test.cc
index 5f0749daa5c1b1d7e07181a513ff98af8da1abf4..37669815c630abc6b6973352422cf6d946dc6755 100644
--- a/test/cpp/end2end/end2end_test.cc
+++ b/test/cpp/end2end/end2end_test.cc
@@ -117,7 +117,7 @@ class Proxy : public ::grpc::cpp::test::util::TestService::Service {
   }
 
  private:
-  std::unique_ptr<::grpc::cpp::test::util::TestService::Stub> stub_;
+  std::unique_ptr< ::grpc::cpp::test::util::TestService::Stub> stub_;
 };
 
 class TestServiceImpl : public ::grpc::cpp::test::util::TestService::Service {