diff --git a/.github/actions/install-env/action.yml b/.github/actions/install-env/action.yml
index 719b9793db..d53bb6ef0c 100644
--- a/.github/actions/install-env/action.yml
+++ b/.github/actions/install-env/action.yml
@@ -51,3 +51,10 @@ runs:
       shell: bash
       if: ${{ inputs.build-root == 'true' }}
       run: poetry install --no-interaction --no-ansi
+
+    - name: Install Qt dependencies
+      # See https://pytest-qt.readthedocs.io/en/latest/troubleshooting.html#github-actions-azure-pipelines-travis-ci-and-gitlab-ci-cd
+      shell: bash
+      run: |
+        sudo apt install libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 x11-utils
+        /sbin/start-stop-daemon --start --quiet --pidfile /tmp/custom_xvfb_99.pid --make-pidfile --background --exec /usr/bin/Xvfb -- :99 -screen 0 1920x1200x24 -ac +extension GLX
diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index f9cb3eb7f5..f4c36de1ed 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -14,6 +14,8 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         python-version: ["3.12", "3.11", "3.10"]
+    env:
+      DISPLAY: ':99.0'
 
     runs-on: ${{ matrix.os }}