diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index dce1392..1a17cd0 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -67,5 +67,8 @@ jobs:
       - name: Set up Python ${{ matrix.python-version }}
         run: uv python install ${{ matrix.python-version }}
 
+      - name: Install dependencies
+        run: uv sync --extra testing
+
       - name: Run tests
         run: uv run pytest tests -n $ASYNCORD_TEST_WORKERS