diff --git a/tests/utests/chameleon/protoc_plugins/empty.swagger.json b/tests/utests/chameleon/protoc_plugins/empty.swagger.json
new file mode 100644
index 0000000..dee6c59
--- /dev/null
+++ b/tests/utests/chameleon/protoc_plugins/empty.swagger.json
@@ -0,0 +1 @@
+{"info": {"version": "version not set", "title": "google/protobuf/empty.proto"}, "paths": {}, "schemes": ["http", "https"], "produces": ["application/json"], "definitions": {"google.protobuf.Empty": {"type": "object", "description": "A generic empty message that you can re-use to avoid defining duplicated\n empty messages in your APIs. A typical example is to use it as the request\n or the response type of an API method. For instance:\n\n     service Foo {\n       rpc Bar(google.protobuf.Empty) returns (google.protobuf.Empty);\n     }\n\n The JSON representation for `Empty` is empty JSON object `{}`.", "properties": {}}}, "swagger": "2.0", "consumes": ["application/json"]}
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