diff --git a/tools/ci/amd64/clang/coverage.sh b/tools/ci/amd64/clang/coverage.sh
index c4993e5..3a9e086 100755
--- a/tools/ci/amd64/clang/coverage.sh
+++ b/tools/ci/amd64/clang/coverage.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+export DISPLAY=':0'
+
 set -e
 cd $(git rev-parse --show-toplevel)/
 rm -rf ./build