diff --git a/CI/.drone.yml b/CI/.drone.yml
index 55d437c07d6..0fa3ab5eae6 100644
--- a/CI/.drone.yml
+++ b/CI/.drone.yml
@@ -2,6 +2,15 @@ kind: pipeline
 name: default
 
 steps:
+# test protobuf schema generator
+- name: protobuf-schema-test
+  image: nanoservice/protobuf-go
+  commands:
+  - protoc --version
+  - mkdir /var/tmp/go/
+  - cd samples/config/petstore/protobuf-schema
+  - protoc --go_out=/var/tmp/go/ services/*
+  - protoc --go_out=/var/tmp/go/ models/*
 # test aspnetcore 3.x
 - name: aspnetcore-test
   image: mcr.microsoft.com/dotnet/core/sdk:3.1
@@ -28,7 +37,7 @@ steps:
 - name: java11-test
   image: openjdk:11.0
   commands:
-  - ./mvnw -quiet clean install -Dorg.slf4j.simpleLogger.defaultLogLevel=error
+  - ./mvnw --quiet clean install -Dorg.slf4j.simpleLogger.defaultLogLevel=error
   - ./mvnw --quiet verify -Psamples.droneio -Dorg.slf4j.simpleLogger.defaultLogLevel=error
   # test java native client
   - ./mvnw clean test -f samples/client/petstore/java/native/pom.xml
diff --git a/bin/configs/other/protobuf-schema.yaml b/bin/configs/protobuf-schema.yaml
similarity index 100%
rename from bin/configs/other/protobuf-schema.yaml
rename to bin/configs/protobuf-schema.yaml
diff --git a/samples/config/petstore/protobuf-schema/.openapi-generator/FILES b/samples/config/petstore/protobuf-schema/.openapi-generator/FILES
new file mode 100644
index 00000000000..fefe8909e75
--- /dev/null
+++ b/samples/config/petstore/protobuf-schema/.openapi-generator/FILES
@@ -0,0 +1,12 @@
+README.md
+models/api_response.proto
+models/category.proto
+models/inline_object.proto
+models/inline_object1.proto
+models/order.proto
+models/pet.proto
+models/tag.proto
+models/user.proto
+services/pet_service.proto
+services/store_service.proto
+services/user_service.proto