diff --git a/mk-test-files.sh b/mk-test-files.sh
index 7237366..94e1027 100755
--- a/mk-test-files.sh
+++ b/mk-test-files.sh
@@ -6,11 +6,14 @@ cd "$(dirname $0)"
 
 # Run this script to generate files used by tests.
 
-echo "Creating protoset..."
+echo "Creating protosets..."
 protoc ../../../google.golang.org/grpc/interop/grpc_testing/test.proto \
 	-I../../../ --include_imports \
 	--descriptor_set_out=testing/test.protoset
 
+protoc testing/example.proto \
+	--include_imports \
+	--descriptor_set_out=testing/example.protoset
 
 echo "Creating certs for TLS testing..."
 if ! hash certstrap 2>/dev/null; then
diff --git a/testing/example.proto b/testing/example.proto
new file mode 100644
index 0000000..1229267
--- /dev/null
+++ b/testing/example.proto
@@ -0,0 +1,19 @@
+syntax = "proto3";
+
+import "google/protobuf/descriptor.proto";
+import "google/protobuf/empty.proto";
+import "google/protobuf/timestamp.proto";
+
+message TestRequest {
+	repeated string file_names = 1;
+}
+
+message TestResponse {
+	map<string, google.protobuf.FileDescriptorProto> file_protos = 1;
+	google.protobuf.Timestamp last_update_date = 2;
+}
+
+service TestService {
+	rpc GetFiles (TestRequest) returns (TestResponse);
+	rpc Ping (google.protobuf.Empty) returns (google.protobuf.Empty);
+}
\ No newline at end of file
diff --git a/testing/example.protoset b/testing/example.protoset
new file mode 100644
index 0000000..b3b19fe
Binary files /dev/null and b/testing/example.protoset differ
diff --git a/testing/test.protoset b/testing/test.protoset
index 63d7060..4b6d521 100644
Binary files a/testing/test.protoset and b/testing/test.protoset differ