diff --git a/test/cpp/interop/interop_server.cc b/test/cpp/interop/interop_server.cc
index 05af18bc6711af2bcb357bba882a61d8cb3611d0..58f20aa611a1ac5eaf71fbd950f8efe7818524d8 100644
--- a/test/cpp/interop/interop_server.cc
+++ b/test/cpp/interop/interop_server.cc
@@ -155,8 +155,9 @@ class TestServiceImpl : public TestService::Service {
   }
 
   // Response contains current timestamp. We ignore everything in the request.
-  Status CacheableUnaryCall(ServerContext* context, const SimpleRequest* request,
-                   SimpleResponse* response) {
+  Status CacheableUnaryCall(ServerContext* context,
+                            const SimpleRequest* request,
+                            SimpleResponse* response) {
     gpr_timespec ts = gpr_now(GPR_CLOCK_PRECISE);
     std::string timestamp = std::to_string((long long unsigned)ts.tv_nsec);
     response->mutable_payload()->set_body(timestamp.c_str(), timestamp.size());