diff --git a/.github/workflows/python-tester.yaml b/.github/workflows/python-tester.yaml
index c9508827..8221844e 100644
--- a/.github/workflows/python-tester.yaml
+++ b/.github/workflows/python-tester.yaml
@@ -235,7 +235,8 @@ jobs:
       # https://github.com/opensafely-core/job-server/issues/3429
       - run: brew install docker
         if: ${{ matrix.os == 'macos-12' }}
-      - run: colima start --memory 8
+      - name: Set up Docker
+        uses: crazy-max/ghaction-setup-docker@v3
         if: ${{ matrix.os == 'macos-12' }}
       - name: Install Poetry
         uses: snok/install-poetry@v1