diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index b5e86e9..6544228 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -38,10 +38,8 @@ jobs:
 
       - name: Run unit tests
         run: |
-          docker run --rm -v "$PWD":/app -w /app python:3.13-alpine sh -c "
-            pip install --no-cache-dir -r requirements-dev.txt &&
-            pytest -v
-          "
+          docker build --target test -t adguard-cidre:test .
+          docker run --rm adguard-cidre:test pytest -v
 
       - name: Check deprecation warnings
         run: |
diff --git a/Dockerfile b/Dockerfile
index 3e7b7c3..cb697c1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.13-alpine
+FROM python:3.13-alpine AS base
 
 ENV TZ=Europe/Paris
 
@@ -11,4 +11,11 @@ WORKDIR /app
 
 COPY blocklist_scheduler.py .
 
+FROM base AS test
+COPY requirements-dev.txt .
+RUN pip install --no-cache-dir -r requirements-dev.txt
+COPY tests/ tests/
+COPY pytest.ini .
+
+FROM base
 ENTRYPOINT ["python3", "blocklist_scheduler.py"]