diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 259ba1e..6482deb 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,12 +1,16 @@
 name: A workflow for my Hello World file
-on: push
+on: [push, pull_request]
 
 jobs:
   build:
     name: Hello world action
-    runs-on: ubuntu-latest    
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+        
     steps:
     - uses: actions/checkout@master
     - uses: ./action-a
       env:
-        MY_NAME: "Mona"
+        MY_NAME: "Ritwick Bhargav"