fix workflow

.github/workflows/run_tests.yml

@@ -2,9 +2,8 @@
 # For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
 
 name: Run Tests
-on:
-  workflow_call:
-    inputs:
+on: [push, pull_request, workflow_call]    
+inputs:
       build_script:
         required: false
         type: string