diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e355f08..3e52361 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -41,7 +41,7 @@ jobs:
         if: startsWith(matrix.os, 'ubuntu')
         run: |
           sudo apt-get update
-          sudo apt-get install -y libasound2-dev libgl-dev libjack-dev libx11-xcb-dev  libxcb1-dev libxcb-dri2-0-dev libxcb-icccm4-dev libxcursor-dev libxkbcommon-dev libxcb-shape0-dev libxcb-xfixes0-dev
+          sudo apt-get install -y xvfb libasound2-dev libgl-dev libjack-dev libx11-xcb-dev  libxcb1-dev libxcb-dri2-0-dev libxcb-icccm4-dev libxcursor-dev libxkbcommon-dev libxcb-shape0-dev libxcb-xfixes0-dev
 
       - uses: actions/cache@v4.1.1
         # FIXME: Caching `target/` causes the Windows runner to blow up after some time
@@ -111,7 +111,9 @@ jobs:
           if [[ $runner_name = 'macos-universal' ]]; then
             pluginval.app/Contents/MacOS/pluginval --verbose --strictness-level 2 target/bundled/DEL2.vst3 || exit 1
           elif [[ $runner_name = 'ubuntu-22.04' ]]; then
-            ./pluginval --verbose --strictness-level 1 target/bundled/DEL2.vst3 || exit 1
+            # This starts up our "fake" display Xvfb, needed for pluginval
+            sudo /usr/bin/Xvfb :0 &
+            ./pluginval --verbose --strictness-level 5 target/bundled/DEL2.vst3 || exit 1
           elif [[ $runner_name = 'windows' ]]; then
             powershell -Command "& { .\pluginval.exe --verbose --strictness-level 10 target/bundled/DEL2.vst3; if ($LASTEXITCODE -ne 0) { exit 1 } }"
           fi