diff --git a/.woodpecker.yml b/.woodpecker.yml
index e2e62f4..731cc8b 100644
--- a/.woodpecker.yml
+++ b/.woodpecker.yml
@@ -3,7 +3,8 @@ when:
 
 steps:
   test:
-    image: python:3.11-slim
+    image: forgejo.corentic.eu/tobi/dervish-ci:latest
+    environment:
+      PYTHONPATH: .
     commands:
-      - pip install --no-cache-dir --editable . pytest
       - python -m pytest tests/ -v
diff --git a/Dockerfile.ci b/Dockerfile.ci
new file mode 100644
index 0000000..33d86be
--- /dev/null
+++ b/Dockerfile.ci
@@ -0,0 +1,2 @@
+FROM python:3.11-slim
+RUN pip install --no-cache-dir pytest