diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
new file mode 100644
index 00000000..33ae56d6
--- /dev/null
+++ b/.github/workflows/pytest.yml
@@ -0,0 +1,24 @@
+name: pytest
+
+on:
+  pull_request:
+
+jobs:
+  pytest:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Install dependencies
+        run: python -m pip install --upgrade pip && python -m pip install -e ".[dev]"
+
+      - name: Run pytest (not slow, not known_bad)
+        env:
+          PYTHONPATH: .:src
+        run: python -m pytest -q -m "not slow and not known_bad"