diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 6b0fa2d6..74743591 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -430,6 +430,7 @@ jobs:
         run: |
           export DISPLAY=:1
           Xvfb ${DISPLAY} -screen 0 1024x768x24 &
+          sleep 5  # give Xvfb time to start
 
           ./test_sunshine --gtest_color=yes