diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 45633ba..f3a2d65 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -24,7 +24,7 @@ jobs:
         if: ${{ ! matrix.is_mac }}
         run: |
           sudo apt-get update
-          sudo apt-get install libxft-dev libxinerama-dev
+          sudo apt-get install libxft-dev libxinerama-dev xserver-xephyr
       - name: Install X libraries (mac)
         if: ${{ matrix.is_mac }}
         run: |