diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -20,9 +20,9 @@
   script:
     - dotnet build isometric-park-fna-core.sln -f netcoreapp3.1 -c Release
     - cp -r fnalibs/lib64 isometric-park-fna/bin/Release/
-    - cd isometric-park-fna/bin/Release/netcoreapp3.1; ls "../../../../fnalibs/lib64"
     - apt-get update
-    - apt install -y xorg-dev libglu1-mesa libgl1-mesa-dev xvfb libxinerama1 libxcursor1
+    - apt install -y xorg-dev libglu1-mesa libgl1-mesa-dev xvfb libxinerama1 libxcursor1 xwd mesa-utils
+    - xvfb-run -a -s "-screen 0 1400x900x24 +extension RANDR" -- glxinfo
     - LD_LIBRARY_PATH="../../../../fnalibs/lib64" DYLD_LIBRARY_PATH="../../../../fnalibs/osx" xvfb-run -a -s "-screen 0 1400x900x24 +extension RANDR" --  dotnet ./isometric-park-fna.dll &
     - sleep 5; xwd -root -out screenshot.xwd
     - sleep 1; killall dotnet