diff --git a/Makefile b/Makefile
index 587f6a46f1e..e3204fc275d 100644
--- a/Makefile
+++ b/Makefile
@@ -2078,105 +2078,105 @@ $(GENDIR)/examples/pubsub/pubsub.grpc.pb.cc: examples/pubsub/pubsub.proto $(PROT
 endif
 
 ifeq ($(NO_PROTOC),true)
-$(GENDIR)/test/cpp/interop/empty.pb.cc: protoc_dep_error
-$(GENDIR)/test/cpp/interop/empty.grpc.pb.cc: protoc_dep_error
+$(GENDIR)/test/cpp/qps/qpstest.pb.cc: protoc_dep_error
+$(GENDIR)/test/cpp/qps/qpstest.grpc.pb.cc: protoc_dep_error
 else
-$(GENDIR)/test/cpp/interop/empty.pb.cc: test/cpp/interop/empty.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+$(GENDIR)/test/cpp/qps/qpstest.pb.cc: test/cpp/qps/qpstest.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
 
-$(GENDIR)/test/cpp/interop/empty.grpc.pb.cc: test/cpp/interop/empty.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+$(GENDIR)/test/cpp/qps/qpstest.grpc.pb.cc: test/cpp/qps/qpstest.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
-$(GENDIR)/test/cpp/interop/messages.pb.cc: protoc_dep_error
-$(GENDIR)/test/cpp/interop/messages.grpc.pb.cc: protoc_dep_error
+$(GENDIR)/test/cpp/util/echo.pb.cc: protoc_dep_error
+$(GENDIR)/test/cpp/util/echo.grpc.pb.cc: protoc_dep_error
 else
-$(GENDIR)/test/cpp/interop/messages.pb.cc: test/cpp/interop/messages.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+$(GENDIR)/test/cpp/util/echo.pb.cc: test/cpp/util/echo.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
 
-$(GENDIR)/test/cpp/interop/messages.grpc.pb.cc: test/cpp/interop/messages.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+$(GENDIR)/test/cpp/util/echo.grpc.pb.cc: test/cpp/util/echo.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
-$(GENDIR)/test/cpp/interop/test.pb.cc: protoc_dep_error
-$(GENDIR)/test/cpp/interop/test.grpc.pb.cc: protoc_dep_error
+$(GENDIR)/test/cpp/util/echo_duplicate.pb.cc: protoc_dep_error
+$(GENDIR)/test/cpp/util/echo_duplicate.grpc.pb.cc: protoc_dep_error
 else
-$(GENDIR)/test/cpp/interop/test.pb.cc: test/cpp/interop/test.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+$(GENDIR)/test/cpp/util/echo_duplicate.pb.cc: test/cpp/util/echo_duplicate.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
 
-$(GENDIR)/test/cpp/interop/test.grpc.pb.cc: test/cpp/interop/test.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+$(GENDIR)/test/cpp/util/echo_duplicate.grpc.pb.cc: test/cpp/util/echo_duplicate.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
-$(GENDIR)/test/cpp/qps/qpstest.pb.cc: protoc_dep_error
-$(GENDIR)/test/cpp/qps/qpstest.grpc.pb.cc: protoc_dep_error
+$(GENDIR)/test/cpp/util/messages.pb.cc: protoc_dep_error
+$(GENDIR)/test/cpp/util/messages.grpc.pb.cc: protoc_dep_error
 else
-$(GENDIR)/test/cpp/qps/qpstest.pb.cc: test/cpp/qps/qpstest.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+$(GENDIR)/test/cpp/util/messages.pb.cc: test/cpp/util/messages.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
 
-$(GENDIR)/test/cpp/qps/qpstest.grpc.pb.cc: test/cpp/qps/qpstest.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+$(GENDIR)/test/cpp/util/messages.grpc.pb.cc: test/cpp/util/messages.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
-$(GENDIR)/test/cpp/util/echo.pb.cc: protoc_dep_error
-$(GENDIR)/test/cpp/util/echo.grpc.pb.cc: protoc_dep_error
+$(GENDIR)/test/proto/empty.pb.cc: protoc_dep_error
+$(GENDIR)/test/proto/empty.grpc.pb.cc: protoc_dep_error
 else
-$(GENDIR)/test/cpp/util/echo.pb.cc: test/cpp/util/echo.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+$(GENDIR)/test/proto/empty.pb.cc: test/proto/empty.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
 
-$(GENDIR)/test/cpp/util/echo.grpc.pb.cc: test/cpp/util/echo.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+$(GENDIR)/test/proto/empty.grpc.pb.cc: test/proto/empty.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
-$(GENDIR)/test/cpp/util/echo_duplicate.pb.cc: protoc_dep_error
-$(GENDIR)/test/cpp/util/echo_duplicate.grpc.pb.cc: protoc_dep_error
+$(GENDIR)/test/proto/messages.pb.cc: protoc_dep_error
+$(GENDIR)/test/proto/messages.grpc.pb.cc: protoc_dep_error
 else
-$(GENDIR)/test/cpp/util/echo_duplicate.pb.cc: test/cpp/util/echo_duplicate.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+$(GENDIR)/test/proto/messages.pb.cc: test/proto/messages.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
 
-$(GENDIR)/test/cpp/util/echo_duplicate.grpc.pb.cc: test/cpp/util/echo_duplicate.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+$(GENDIR)/test/proto/messages.grpc.pb.cc: test/proto/messages.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
 endif
 
 ifeq ($(NO_PROTOC),true)
-$(GENDIR)/test/cpp/util/messages.pb.cc: protoc_dep_error
-$(GENDIR)/test/cpp/util/messages.grpc.pb.cc: protoc_dep_error
+$(GENDIR)/test/proto/test.pb.cc: protoc_dep_error
+$(GENDIR)/test/proto/test.grpc.pb.cc: protoc_dep_error
 else
-$(GENDIR)/test/cpp/util/messages.pb.cc: test/cpp/util/messages.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+$(GENDIR)/test/proto/test.pb.cc: test/proto/test.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[PROTOC]  Generating protobuf CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --cpp_out=$(GENDIR) $<
 
-$(GENDIR)/test/cpp/util/messages.grpc.pb.cc: test/cpp/util/messages.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
+$(GENDIR)/test/proto/test.grpc.pb.cc: test/proto/test.proto $(PROTOBUF_DEP) $(PROTOC_PLUGINS)
 	$(E) "[GRPC]    Generating gRPC's protobuf service CC file from $<"
 	$(Q) mkdir -p `dirname $@`
 	$(Q) $(PROTOC) --grpc_out=$(GENDIR) --plugin=protoc-gen-grpc=$(BINDIR)/$(CONFIG)/grpc_cpp_plugin $<
@@ -3898,9 +3898,9 @@ $(OBJDIR)/$(CONFIG)/test/cpp/interop/client_helper.o:
 
 
 LIBINTEROP_CLIENT_MAIN_SRC = \
-    $(GENDIR)/test/cpp/interop/empty.pb.cc $(GENDIR)/test/cpp/interop/empty.grpc.pb.cc \
-    $(GENDIR)/test/cpp/interop/messages.pb.cc $(GENDIR)/test/cpp/interop/messages.grpc.pb.cc \
-    $(GENDIR)/test/cpp/interop/test.pb.cc $(GENDIR)/test/cpp/interop/test.grpc.pb.cc \
+    $(GENDIR)/test/proto/empty.pb.cc $(GENDIR)/test/proto/empty.grpc.pb.cc \
+    $(GENDIR)/test/proto/messages.pb.cc $(GENDIR)/test/proto/messages.grpc.pb.cc \
+    $(GENDIR)/test/proto/test.pb.cc $(GENDIR)/test/proto/test.grpc.pb.cc \
     test/cpp/interop/client.cc \
     test/cpp/interop/interop_client.cc \
 
@@ -3929,9 +3929,9 @@ ifneq ($(OPENSSL_DEP),)
 # This is to ensure the embedded OpenSSL is built beforehand, properly
 # installing headers to their final destination on the drive. We need this
 # otherwise parallel compilation will fail if a source is compiled first.
-test/cpp/interop/empty.proto: $(OPENSSL_DEP)
-test/cpp/interop/messages.proto: $(OPENSSL_DEP)
-test/cpp/interop/test.proto: $(OPENSSL_DEP)
+test/proto/empty.proto: $(OPENSSL_DEP)
+test/proto/messages.proto: $(OPENSSL_DEP)
+test/proto/test.proto: $(OPENSSL_DEP)
 test/cpp/interop/client.cc: $(OPENSSL_DEP)
 test/cpp/interop/interop_client.cc: $(OPENSSL_DEP)
 endif
@@ -3961,8 +3961,8 @@ endif
 
 
 
-$(OBJDIR)/$(CONFIG)/test/cpp/interop/client.o:     $(GENDIR)/test/cpp/interop/empty.pb.cc $(GENDIR)/test/cpp/interop/empty.grpc.pb.cc    $(GENDIR)/test/cpp/interop/messages.pb.cc $(GENDIR)/test/cpp/interop/messages.grpc.pb.cc    $(GENDIR)/test/cpp/interop/test.pb.cc $(GENDIR)/test/cpp/interop/test.grpc.pb.cc
-$(OBJDIR)/$(CONFIG)/test/cpp/interop/interop_client.o:     $(GENDIR)/test/cpp/interop/empty.pb.cc $(GENDIR)/test/cpp/interop/empty.grpc.pb.cc    $(GENDIR)/test/cpp/interop/messages.pb.cc $(GENDIR)/test/cpp/interop/messages.grpc.pb.cc    $(GENDIR)/test/cpp/interop/test.pb.cc $(GENDIR)/test/cpp/interop/test.grpc.pb.cc
+$(OBJDIR)/$(CONFIG)/test/cpp/interop/client.o:     $(GENDIR)/test/proto/empty.pb.cc $(GENDIR)/test/proto/empty.grpc.pb.cc    $(GENDIR)/test/proto/messages.pb.cc $(GENDIR)/test/proto/messages.grpc.pb.cc    $(GENDIR)/test/proto/test.pb.cc $(GENDIR)/test/proto/test.grpc.pb.cc
+$(OBJDIR)/$(CONFIG)/test/cpp/interop/interop_client.o:     $(GENDIR)/test/proto/empty.pb.cc $(GENDIR)/test/proto/empty.grpc.pb.cc    $(GENDIR)/test/proto/messages.pb.cc $(GENDIR)/test/proto/messages.grpc.pb.cc    $(GENDIR)/test/proto/test.pb.cc $(GENDIR)/test/proto/test.grpc.pb.cc
 
 
 LIBINTEROP_SERVER_HELPER_SRC = \
@@ -4022,9 +4022,9 @@ $(OBJDIR)/$(CONFIG)/test/cpp/interop/server_helper.o:
 
 
 LIBINTEROP_SERVER_MAIN_SRC = \
-    $(GENDIR)/test/cpp/interop/empty.pb.cc $(GENDIR)/test/cpp/interop/empty.grpc.pb.cc \
-    $(GENDIR)/test/cpp/interop/messages.pb.cc $(GENDIR)/test/cpp/interop/messages.grpc.pb.cc \
-    $(GENDIR)/test/cpp/interop/test.pb.cc $(GENDIR)/test/cpp/interop/test.grpc.pb.cc \
+    $(GENDIR)/test/proto/empty.pb.cc $(GENDIR)/test/proto/empty.grpc.pb.cc \
+    $(GENDIR)/test/proto/messages.pb.cc $(GENDIR)/test/proto/messages.grpc.pb.cc \
+    $(GENDIR)/test/proto/test.pb.cc $(GENDIR)/test/proto/test.grpc.pb.cc \
     test/cpp/interop/server.cc \
 
 
@@ -4052,9 +4052,9 @@ ifneq ($(OPENSSL_DEP),)
 # This is to ensure the embedded OpenSSL is built beforehand, properly
 # installing headers to their final destination on the drive. We need this
 # otherwise parallel compilation will fail if a source is compiled first.
-test/cpp/interop/empty.proto: $(OPENSSL_DEP)
-test/cpp/interop/messages.proto: $(OPENSSL_DEP)
-test/cpp/interop/test.proto: $(OPENSSL_DEP)
+test/proto/empty.proto: $(OPENSSL_DEP)
+test/proto/messages.proto: $(OPENSSL_DEP)
+test/proto/test.proto: $(OPENSSL_DEP)
 test/cpp/interop/server.cc: $(OPENSSL_DEP)
 endif
 
@@ -4083,7 +4083,7 @@ endif
 
 
 
-$(OBJDIR)/$(CONFIG)/test/cpp/interop/server.o:     $(GENDIR)/test/cpp/interop/empty.pb.cc $(GENDIR)/test/cpp/interop/empty.grpc.pb.cc    $(GENDIR)/test/cpp/interop/messages.pb.cc $(GENDIR)/test/cpp/interop/messages.grpc.pb.cc    $(GENDIR)/test/cpp/interop/test.pb.cc $(GENDIR)/test/cpp/interop/test.grpc.pb.cc
+$(OBJDIR)/$(CONFIG)/test/cpp/interop/server.o:     $(GENDIR)/test/proto/empty.pb.cc $(GENDIR)/test/proto/empty.grpc.pb.cc    $(GENDIR)/test/proto/messages.pb.cc $(GENDIR)/test/proto/messages.grpc.pb.cc    $(GENDIR)/test/proto/test.pb.cc $(GENDIR)/test/proto/test.grpc.pb.cc
 
 
 LIBPUBSUB_CLIENT_LIB_SRC = \
diff --git a/build.json b/build.json
index b885d2eb17e..58837e2c204 100644
--- a/build.json
+++ b/build.json
@@ -578,9 +578,9 @@
       "build": "private",
       "language": "c++",
       "src": [
-        "test/cpp/interop/empty.proto",
-        "test/cpp/interop/messages.proto",
-        "test/cpp/interop/test.proto",
+        "test/proto/empty.proto",
+        "test/proto/messages.proto",
+        "test/proto/test.proto",
         "test/cpp/interop/client.cc",
         "test/cpp/interop/interop_client.cc"
       ],
@@ -613,9 +613,9 @@
       "build": "private",
       "language": "c++",
       "src": [
-        "test/cpp/interop/empty.proto",
-        "test/cpp/interop/messages.proto",
-        "test/cpp/interop/test.proto",
+        "test/proto/empty.proto",
+        "test/proto/messages.proto",
+        "test/proto/test.proto",
         "test/cpp/interop/server.cc"
       ],
       "deps": [
diff --git a/test/cpp/interop/interop_client.cc b/test/cpp/interop/interop_client.cc
index fd9c2e024ab..7f5757d2ba8 100644
--- a/test/cpp/interop/interop_client.cc
+++ b/test/cpp/interop/interop_client.cc
@@ -43,9 +43,9 @@
 #include <grpc++/client_context.h>
 #include <grpc++/status.h>
 #include <grpc++/stream.h>
-#include "test/cpp/interop/test.grpc.pb.h"
-#include "test/cpp/interop/empty.grpc.pb.h"
-#include "test/cpp/interop/messages.grpc.pb.h"
+#include "test/proto/test.grpc.pb.h"
+#include "test/proto/empty.grpc.pb.h"
+#include "test/proto/messages.grpc.pb.h"
 
 namespace grpc {
 namespace testing {
diff --git a/test/cpp/interop/interop_client.h b/test/cpp/interop/interop_client.h
index b0ab320f8dc..3161f7f8756 100644
--- a/test/cpp/interop/interop_client.h
+++ b/test/cpp/interop/interop_client.h
@@ -38,7 +38,7 @@
 #include <grpc/grpc.h>
 #include <grpc++/channel_interface.h>
 #include <grpc++/status.h>
-#include "test/cpp/interop/messages.grpc.pb.h"
+#include "test/proto/messages.grpc.pb.h"
 
 namespace grpc {
 namespace testing {
diff --git a/test/cpp/interop/server.cc b/test/cpp/interop/server.cc
index 94e266fcbd3..7888102837a 100644
--- a/test/cpp/interop/server.cc
+++ b/test/cpp/interop/server.cc
@@ -48,9 +48,9 @@
 #include <grpc++/server_credentials.h>
 #include <grpc++/status.h>
 #include <grpc++/stream.h>
-#include "test/cpp/interop/test.grpc.pb.h"
-#include "test/cpp/interop/empty.grpc.pb.h"
-#include "test/cpp/interop/messages.grpc.pb.h"
+#include "test/proto/test.grpc.pb.h"
+#include "test/proto/empty.grpc.pb.h"
+#include "test/proto/messages.grpc.pb.h"
 #include "test/cpp/interop/server_helper.h"
 #include "test/cpp/util/test_config.h"
 
diff --git a/test/cpp/interop/empty.proto b/test/proto/empty.proto
similarity index 100%
rename from test/cpp/interop/empty.proto
rename to test/proto/empty.proto
diff --git a/test/cpp/interop/messages.proto b/test/proto/messages.proto
similarity index 100%
rename from test/cpp/interop/messages.proto
rename to test/proto/messages.proto
diff --git a/test/cpp/interop/test.proto b/test/proto/test.proto
similarity index 97%
rename from test/cpp/interop/test.proto
rename to test/proto/test.proto
index b55780e5cde..b9483d84378 100644
--- a/test/cpp/interop/test.proto
+++ b/test/proto/test.proto
@@ -30,10 +30,11 @@
 
 // An integration test service that covers all the method signature permutations
 // of unary/streaming requests/responses.
+
 syntax = "proto2";
 
-import "test/cpp/interop/empty.proto";
-import "test/cpp/interop/messages.proto";
+import "test/proto/empty.proto";
+import "test/proto/messages.proto";
 
 package grpc.testing;