diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 83d6331c..8b9dbe3e 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,5 +1,7 @@
 name: Run tests
-on: [push]
+on:   
+pull_request:
+  branches: [ develop ]
 jobs:
   run:
     runs-on: ${{ matrix.os }}
@@ -12,7 +14,13 @@ jobs:
       PYTHON: ${{ matrix.python-version }}
       
     steps:
-    - uses: actions/checkout@develop
+    - uses: actions/checkout@v2.3.1
+    - name: Check Commit Messages
+      with:
+        fetch-depth: 0
+      - uses: actions/setup-node@v2.1.0
+      - run: yarn add @commitlint/{config-conventional,cli}
+      - run: yarn run commitlint --from HEAD~${{ github.event.pull_request.commits }} --to HEAD
     - name: Setup Python
       uses: actions/setup-python@develop
       with: