diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 57384e8..1a37e85 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,19 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.13", "3.13"]
+        python-version:
+          [
+            "3.7",
+            "3.8",
+            "3.9",
+            "3.10",
+            "3.11",
+            "3.13",
+            "3.13",
+            "pypy3.8",
+            "pypy3.9",
+            "pypy3.10",
+          ]
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4