diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6a013f61758ffc2f8821f612e7b4e7109fe3eb9e..bc1136a1bc037087e667d4efc91fede16285bdee 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -63,3 +63,29 @@ test_ppparis:
     - data/ppparis/*.txt
     - output.log
     expire_in: 12 hours
+
+test_pref13:
+  stage: test
+  image: ${IMAGE_NAME}:latest
+  needs: [install]
+  script:
+  - curl --silent --location --output artifacts.zip "${CI_SERVER_PROTOCOL}://${CI_SERVER_HOST}:${CI_SERVER_PORT}/api/v4/projects/${CI_PROJECT_ID}/jobs/artifacts/${CI_COMMIT_BRANCH}/download?job=${CI_JOB_NAME}&job_token=${CI_JOB_TOKEN}" || true
+  - unzip -q artifacts.zip data/pref13/* || true
+  - rm artifacts.zip || true
+  - source bin/activate
+  - /etc/init.d/tor start
+  - python ./pref13.py
+  retry: 2
+  only:
+  - main
+  cache:
+    key: $CI_COMMIT_REF_SLUG
+    paths:
+    - bin/
+    - lib/
+    - pyvenv.cfg
+  artifacts:
+    paths:
+    - data/pref13/*.txt
+    - output.log
+    expire_in: 12 hours
diff --git a/Dockerfile-base b/Dockerfile-base
index 95efbb9b3da373b0f1e513dee2a6bb9057925078..3ef580d143f91e4b1dab43871d39c18e56609e2c 100644
--- a/Dockerfile-base
+++ b/Dockerfile-base
@@ -4,7 +4,8 @@ ENV DEBIAN_FRONTEND="noninteractive"
 
 RUN apt-get update && \
 	apt-get dist-upgrade -y && \
-	apt-get install --no-install-recommends -y python3 python3-virtualenv chromium-driver make xauth xvfb tesseract-ocr tesseract-ocr-eng tesseract-ocr-fra ocrmypdf curl unzip && \
+	apt-get install --no-install-recommends -y python3 python3-virtualenv chromium-driver make xauth xvfb tesseract-ocr tesseract-ocr-eng tesseract-ocr-fra ocrmypdf curl unzip tor && \
 	apt-get clean && \
 	rm -rf /var/lib/apt/lists && \
-	ln -s /usr/bin/python3 /usr/bin/python
+	ln -s /usr/bin/python3 /usr/bin/python && \
+	sed -i '/^#ControlPort 9051/s/^#//' /etc/tor/torrc