diff --git a/.github/workflows/build-main.yml b/.github/workflows/build-main.yml
index 9919d631ff0922..f3bef6e1513fc6 100644
--- a/.github/workflows/build-main.yml
+++ b/.github/workflows/build-main.yml
@@ -1,6 +1,6 @@
 name: World Build
 
-on: [push]
+on: [push, pull_request]
 
 jobs:
   build:
@@ -9,5 +9,13 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+
       - name: Run Build
         run: ./bootstrap && make -f Makefile-Standalone distcheck
+
+      - name: Run Pretty Check
+        run: |
+          sudo apt-get remove -y clang-6.0 libclang-common-6.0-dev libclang1-6.0 libllvm6.0
+          sudo apt install clang-format-6.0
+          ./bootstrap
+          make -f Makefile-Standalone pretty-check