diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 498b74dcc48608a97dc37ca18689f7cbd4140c26..d7fb813cb0abfb42b9bd93d80497f7d0816dabff 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -145,7 +145,8 @@ test:system-tests: &test
     - build:system-tests
   script:
     # TODO: Move this into Docker image
-    - apt-get update && apt-get install -y python3-vtk7
+    - apt-get update
+    - DEBIAN_FRONTEND=noninteractive apt-get install -y python3-vtk7
     - $DUNECONTROL --only=dorie configure
     - $DUNECONTROL --only=dorie make system_tests
   artifacts:
@@ -191,7 +192,8 @@ test:python-tests:
   dependencies: []
   script:
     # TODO: Move this into Docker image
-    - apt-get update && apt-get install -y python3-vtk7
+    - apt-get update
+    - DEBIAN_FRONTEND=noninteractive apt-get install -y libxt-dev # python3-vtk7
     - $DUNECONTROL --only=dorie configure
     - $DUNECONTROL --only=dorie make test_python