diff --git a/test/cpp/interop/interop_client.cc b/test/cpp/interop/interop_client.cc
index af97fe0940a..d2192f5e70a 100644
--- a/test/cpp/interop/interop_client.cc
+++ b/test/cpp/interop/interop_client.cc
@@ -122,7 +122,8 @@ InteropClient::InteropClient(std::shared_ptr<Channel> channel,
     : serviceStub_(channel, new_stub_every_test_case),
       do_not_abort_on_transient_failures_(do_not_abort_on_transient_failures) {}
 
-bool InteropClient::AssertStatusOk(const Status& s) {
+bool InteropClient::AssertStatusOk(const Status& s,
+                                   const grpc::string& optional_debug_string) {
   if (s.ok()) {
     return true;
   }
@@ -131,17 +132,21 @@ bool InteropClient::AssertStatusOk(const Status& s) {
   // already checked for s.ok() above). So, the following will call abort()
   // (unless s.error_code() corresponds to a transient failure and
   // 'do_not_abort_on_transient_failures' is true)
-  return AssertStatusCode(s, StatusCode::OK);
+  return AssertStatusCode(s, StatusCode::OK, optional_debug_string);
 }
 
-bool InteropClient::AssertStatusCode(const Status& s,
-                                     StatusCode expected_code) {
+bool InteropClient::AssertStatusCode(
+    const Status& s, StatusCode expected_code,
+    const grpc::string& optional_debug_string) {
   if (s.error_code() == expected_code) {
     return true;
   }
 
-  gpr_log(GPR_ERROR, "Error status code: %d (expected: %d), message: %s",
-          s.error_code(), expected_code, s.error_message().c_str());
+  gpr_log(GPR_ERROR,
+          "Error status code: %d (expected: %d), message: %s,"
+          " debug string: %s",
+          s.error_code(), expected_code, s.error_message().c_str(),
+          optional_debug_string.c_str());
 
   // In case of transient transient/retryable failures (like a broken
   // connection) we may or may not abort (see TransientFailureOrAbort())
@@ -161,7 +166,7 @@ bool InteropClient::DoEmpty() {
 
   Status s = serviceStub_.Get()->EmptyCall(&context, request, &response);
 
-  if (!AssertStatusOk(s)) {
+  if (!AssertStatusOk(s, context.debug_error_string())) {
     return false;
   }
 
@@ -191,7 +196,7 @@ bool InteropClient::PerformLargeUnary(SimpleRequest* request,
   }
 
   Status s = serviceStub_.Get()->UnaryCall(&context, *request, response);
-  if (!AssertStatusOk(s)) {
+  if (!AssertStatusOk(s, context.debug_error_string())) {
     return false;
   }
 
@@ -241,7 +246,7 @@ bool InteropClient::DoOauth2AuthToken(const grpc::string& username,
 
   Status s = serviceStub_.Get()->UnaryCall(&context, request, &response);
 
-  if (!AssertStatusOk(s)) {
+  if (!AssertStatusOk(s, context.debug_error_string())) {
     return false;
   }
 
@@ -269,7 +274,7 @@ bool InteropClient::DoPerRpcCreds(const grpc::string& json_key) {
 
   Status s = serviceStub_.Get()->UnaryCall(&context, request, &response);
 
-  if (!AssertStatusOk(s)) {
+  if (!AssertStatusOk(s, context.debug_error_string())) {
     return false;
   }
 
@@ -412,7 +417,7 @@ bool InteropClient::DoRequestStreaming() {
   GPR_ASSERT(stream->WritesDone());
 
   Status s = stream->Finish();
-  if (!AssertStatusOk(s)) {
+  if (!AssertStatusOk(s, context.debug_error_string())) {
     return false;
   }
 
@@ -451,7 +456,7 @@ bool InteropClient::DoResponseStreaming() {
   }
 
   Status s = stream->Finish();
-  if (!AssertStatusOk(s)) {
+  if (!AssertStatusOk(s, context.debug_error_string())) {
     return false;
   }
 
@@ -516,7 +521,7 @@ bool InteropClient::DoClientCompressedStreaming() {
   GPR_ASSERT(stream->WritesDone());
 
   s = stream->Finish();
-  if (!AssertStatusOk(s)) {
+  if (!AssertStatusOk(s, context.debug_error_string())) {
     return false;
   }
 
@@ -578,7 +583,7 @@ bool InteropClient::DoServerCompressedStreaming() {
   }
 
   Status s = stream->Finish();
-  if (!AssertStatusOk(s)) {
+  if (!AssertStatusOk(s, context.debug_error_string())) {
     return false;
   }
   return true;
@@ -619,7 +624,7 @@ bool InteropClient::DoResponseStreamingWithSlowConsumer() {
   }
 
   Status s = stream->Finish();
-  if (!AssertStatusOk(s)) {
+  if (!AssertStatusOk(s, context.debug_error_string())) {
     return false;
   }
 
@@ -666,7 +671,7 @@ bool InteropClient::DoHalfDuplex() {
   }
 
   Status s = stream->Finish();
-  if (!AssertStatusOk(s)) {
+  if (!AssertStatusOk(s, context.debug_error_string())) {
     return false;
   }
 
@@ -710,7 +715,7 @@ bool InteropClient::DoPingPong() {
   GPR_ASSERT(!stream->Read(&response));
 
   Status s = stream->Finish();
-  if (!AssertStatusOk(s)) {
+  if (!AssertStatusOk(s, context.debug_error_string())) {
     return false;
   }
 
@@ -732,7 +737,8 @@ bool InteropClient::DoCancelAfterBegin() {
   context.TryCancel();
   Status s = stream->Finish();
 
-  if (!AssertStatusCode(s, StatusCode::CANCELLED)) {
+  if (!AssertStatusCode(s, StatusCode::CANCELLED,
+                        context.debug_error_string())) {
     return false;
   }
 
@@ -790,7 +796,8 @@ bool InteropClient::DoTimeoutOnSleepingServer() {
   stream->Write(request);
 
   Status s = stream->Finish();
-  if (!AssertStatusCode(s, StatusCode::DEADLINE_EXCEEDED)) {
+  if (!AssertStatusCode(s, StatusCode::DEADLINE_EXCEEDED,
+                        context.debug_error_string())) {
     return false;
   }
 
@@ -810,7 +817,7 @@ bool InteropClient::DoEmptyStream() {
   GPR_ASSERT(stream->Read(&response) == false);
 
   Status s = stream->Finish();
-  if (!AssertStatusOk(s)) {
+  if (!AssertStatusOk(s, context.debug_error_string())) {
     return false;
   }
 
@@ -833,7 +840,8 @@ bool InteropClient::DoStatusWithMessage() {
   requested_status->set_code(test_code);
   requested_status->set_message(test_msg);
   Status s = serviceStub_.Get()->UnaryCall(&context, request, &response);
-  if (!AssertStatusCode(s, grpc::StatusCode::UNKNOWN)) {
+  if (!AssertStatusCode(s, grpc::StatusCode::UNKNOWN,
+                        context.debug_error_string())) {
     return false;
   }
   GPR_ASSERT(s.error_message() == test_msg);
@@ -853,7 +861,8 @@ bool InteropClient::DoStatusWithMessage() {
   while (stream->Read(&streaming_response))
     ;
   s = stream->Finish();
-  if (!AssertStatusCode(s, grpc::StatusCode::UNKNOWN)) {
+  if (!AssertStatusCode(s, grpc::StatusCode::UNKNOWN,
+                        context.debug_error_string())) {
     return false;
   }
   GPR_ASSERT(s.error_message() == test_msg);
@@ -880,7 +889,7 @@ bool InteropClient::DoCacheableUnary() {
   context1.AddMetadata("x-user-ip", "1.2.3.4");
   Status s1 =
       serviceStub_.Get()->CacheableUnaryCall(&context1, request, &response1);
-  if (!AssertStatusOk(s1)) {
+  if (!AssertStatusOk(s1, context1.debug_error_string())) {
     return false;
   }
   gpr_log(GPR_DEBUG, "response 1 payload: %s",
@@ -893,7 +902,7 @@ bool InteropClient::DoCacheableUnary() {
   context2.AddMetadata("x-user-ip", "1.2.3.4");
   Status s2 =
       serviceStub_.Get()->CacheableUnaryCall(&context2, request, &response2);
-  if (!AssertStatusOk(s2)) {
+  if (!AssertStatusOk(s2, context2.debug_error_string())) {
     return false;
   }
   gpr_log(GPR_DEBUG, "response 2 payload: %s",
@@ -915,7 +924,7 @@ bool InteropClient::DoCacheableUnary() {
   context3.AddMetadata("x-user-ip", "1.2.3.4");
   Status s3 =
       serviceStub_.Get()->CacheableUnaryCall(&context3, request1, &response3);
-  if (!AssertStatusOk(s3)) {
+  if (!AssertStatusOk(s3, context3.debug_error_string())) {
     return false;
   }
   gpr_log(GPR_DEBUG, "response 3 payload: %s",
@@ -946,7 +955,7 @@ bool InteropClient::DoCustomMetadata() {
     request.mutable_payload()->set_body(payload.c_str(), kLargeRequestSize);
 
     Status s = serviceStub_.Get()->UnaryCall(&context, request, &response);
-    if (!AssertStatusOk(s)) {
+    if (!AssertStatusOk(s, context.debug_error_string())) {
       return false;
     }
 
@@ -997,7 +1006,7 @@ bool InteropClient::DoCustomMetadata() {
     GPR_ASSERT(!stream->Read(&response));
 
     Status s = stream->Finish();
-    if (!AssertStatusOk(s)) {
+    if (!AssertStatusOk(s, context.debug_error_string())) {
       return false;
     }
 
@@ -1028,7 +1037,8 @@ bool InteropClient::DoUnimplementedService() {
 
   Status s = stub->UnimplementedCall(&context, request, &response);
 
-  if (!AssertStatusCode(s, StatusCode::UNIMPLEMENTED)) {
+  if (!AssertStatusCode(s, StatusCode::UNIMPLEMENTED,
+                        context.debug_error_string())) {
     return false;
   }
 
@@ -1046,7 +1056,8 @@ bool InteropClient::DoUnimplementedMethod() {
   Status s =
       serviceStub_.Get()->UnimplementedCall(&context, request, &response);
 
-  if (!AssertStatusCode(s, StatusCode::UNIMPLEMENTED)) {
+  if (!AssertStatusCode(s, StatusCode::UNIMPLEMENTED,
+                        context.debug_error_string())) {
     return false;
   }
 
diff --git a/test/cpp/interop/interop_client.h b/test/cpp/interop/interop_client.h
index 57e8ba63f5a..b8bb134c204 100644
--- a/test/cpp/interop/interop_client.h
+++ b/test/cpp/interop/interop_client.h
@@ -103,8 +103,10 @@ class InteropClient {
   /// Run \a custom_check_fn as an additional check.
   bool PerformLargeUnary(SimpleRequest* request, SimpleResponse* response,
                          CheckerFn custom_checks_fn);
-  bool AssertStatusOk(const Status& s);
-  bool AssertStatusCode(const Status& s, StatusCode expected_code);
+  bool AssertStatusOk(const Status& s,
+                      const grpc::string& optional_debug_string);
+  bool AssertStatusCode(const Status& s, StatusCode expected_code,
+                        const grpc::string& optional_debug_string);
   bool TransientFailureOrAbort();
   ServiceStub serviceStub_;