diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 6f2a748e..fc994db0 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -1,6 +1,6 @@
 name: tests
 
-on: [push]
+on: [push, pull_request]
 
 jobs:
   test:
@@ -12,7 +12,7 @@ jobs:
         python-version: [3.5, 3.6, 3.7, 3.8]
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v1