diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 5edbe2ed..44e237c2 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.4", "3.5", "3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "pypy3"]
+        python-version: ["3.4", "3.5", "3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "pypy3.9"]
 
     steps:
     - uses: actions/checkout@v3