diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 4c198eb5791139dcf26c2d509e13d7a5d7f7821e..355c3fbf39603dbb65097bb18faf56e93e3d868a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -74,10 +74,11 @@ stages:
     - apt install -y xvfb # Virtual framebuffer for GL stuff.
     - apt install -y inkscape pdftk
     - apt install -y latexmk  poppler-utils # latexmk and pdftocairo
+    - apt install -y texlive-latex-recommended
     - pip install -U Pillow
     - pip install -e ./
     - cd tests
-    - xvfb-run -s "-screen 0 1400x900x24" python test_slider.py
+    - xvfb-run -s "-screen 0 1400x900x24" python -m unittest test_slider.py
     - latexmk --version
 #    - apt-get install -y software-properties-common
 #    - apt-get -y update