diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 81b91bd..382480f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,11 +1,25 @@
 name: A workflow for my Hello World file
-on: push
+on:
+  pull_request:
+    types: [ opened, synchronize, reopened ]
+    branches:
+      - main
 jobs:
   build:
-    name: Hello world action
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [ '2.x', '3.x' ]
+    name: Python ${{ matrix.python-version }} sample    
     steps:
       - uses: actions/checkout@v1
-      - uses: ./action-a
+      - name: Setup python
+        uses: actions/setup-python@v2
         with:
-          MY_NAME: "Mona"
+          python-version: ${{ matrix.python-version }}
+          architecture: x64
+      - name: 'execute test script'
+        run: python --version
+#       - uses: ./action-a
+#         with:
+#           MY_NAME: "Mona"
diff --git a/test.py b/test.py
new file mode 100644
index 0000000..57af2c1
--- /dev/null
+++ b/test.py
@@ -0,0 +1,3 @@
+#!/usr/bin/env python
+
+print("Hello World!")