diff --git a/tools/ci/amd64/gcc/unit_tests.sh b/tools/ci/amd64/gcc/unit_tests.sh
index 8466795..e44b63a 100755
--- a/tools/ci/amd64/gcc/unit_tests.sh
+++ b/tools/ci/amd64/gcc/unit_tests.sh
@@ -4,8 +4,10 @@ set -e
 cd $(git rev-parse --show-toplevel)/
 rm -rf ./build && mkdir build/ && cd build
 
+Xvfb :99 -screen 0 1024x768x16 &
 export CXX=$(which g++)
 export CC=$(which gcc)
+export DISPLAY=:99
 
 lshw -C display
 vulkaninfo --summary