diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 99745a5..0b687bb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -43,6 +43,7 @@ jobs:
       if: matrix.platform == 'ubuntu-latest' && matrix.test-type == 'with-display'
       run: |
         sudo apt-get install -qq libxss-dev gcc pkg-config libwayland-dev libx11-dev libx11-xcb-dev libxkbcommon-x11-dev libgles2-mesa-dev libegl1-mesa-dev libffi-dev libxcursor-dev libvulkan-dev xdotool x11-utils xdotool i3-wm
+        echo "DISPLAY=${DISPLAY}"
         Xvfb :99 -screen 0 1920x1024x24 &
         sleep 1
         i3 &