diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 7cbd82f..3d6c5fb 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -3,6 +3,9 @@ name: CI
 on:
   issues:
     types: [opened]
+  pull_request:
+    branches: master
+
 jobs:
   build:
 
@@ -11,7 +14,7 @@ jobs:
     steps:
     - uses: actions/checkout@v1
     - name: Run a one-line script
-      run: echo Hello, world!
+      run: echo Hello, github!
     - name: Run a multi-line script
       run: |
         echo Add other actions to build,