diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 89a6d2bb4..5ee0381c4 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -10,12 +10,22 @@ jobs:
       CONFIG: ${{ matrix.config }}
     strategy:
       matrix:
-        config: [minimal, full, full-debug]
         os: [ubuntu-latest, macos-latest]
+        config: [minimal, full, full-debug]
+        qt_version: ['5.14.2']
+        include:
+          - os: ubuntu-latest
+            config: full
+            qt_version: 5.9
+          - os: macos-latest
+            config: full
+            qt_version: 5.9
     steps:
       - uses: actions/checkout@v2
       - name: Install Qt
         uses: jurplel/install-qt-action@v2
+        with:
+          version: ${{ matrix.qt_version }}
       - name: Install extra packages
         run: tests/travis/install-build-depends
       - name: Disable OS X firewall