diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 649a4598..97c310cc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -89,6 +89,7 @@ jobs:
           sudo apt-get install libxcb-render-util0-dev libxcb-util-dev libxcb-xinerama0-dev libxcb-xkb-dev
           sudo apt-get install libxkbcommon-dev libxkbcommon-x11-dev
           export DISPLAY=:1
+          export QT_QPA_PLATFORM=offscreen
           sudo Xvfb $DISPLAY -screen 0 1024x768x24 </dev/null &
           export QT_DEBUG_PLUGINS=0
           export LD_LIBRARY_PATH=$pythonLocation"/lib/python${{ matrix.python-version }}/site-packages/PySide6/Qt/plugins/platforms"