diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b3db721c64..60801acecd 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -20,6 +20,9 @@ jobs:
         - ubuntu-latest
         - macos-latest
         - windows-latest
+        include:
+        - platform: ubuntu-latest
+          python: 'pypy3.9'
     runs-on: ${{ matrix.platform }}
     steps:
       - uses: actions/checkout@v3