diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 91e1df3df82a2eaffa3b44a743d49f2c3081516b..aef3136403ba13e0c6eedf1037070bf7adef274b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -26,7 +26,7 @@ tests:
     stage: tests
     before_script:
         - apt update
-        - apt install -y libgl1-mesa-glx xvfb graphviz libgraphviz-dev xdg-utils libcairo2-dev libjpeg-dev libgif-dev
+        - apt install -y libgl1-mesa-glx xvfb graphviz libgraphviz-dev xdg-utils libcairo2-dev libjpeg-dev libgif-dev python-pyglet
         - wget -nv https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh -O /tmp/Miniconda3-latest-Linux-x86_64.sh
         - bash /tmp/Miniconda3-latest-Linux-x86_64.sh -b -p /tmp/miniconda3
         - export PATH=/tmp/miniconda3/bin:$PATH