diff --git a/devops/spec/pb_spec.sh b/devops/spec/pb_spec.sh
index 19707fa..e889103 100644
--- a/devops/spec/pb_spec.sh
+++ b/devops/spec/pb_spec.sh
@@ -10,5 +10,6 @@ Describe 'Protobuf transpiler'
     When call test_pb_prj "$1"
     The status should be success
     The output should match pattern '*'
+    The stderr should match pattern '*'
   End
 End