diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 08837938..d283790a 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -9,6 +9,10 @@ jobs:
       FEATURE_MUNIN: false
     steps:
       - uses: actions/checkout@v2
+      # without nanasess/setup-pup setup/webmail.sh returns "Unsupported PHP version. Required PHP >= 5.4 and < 8.0", which is generated by roundcubemail/program/include/iniset.php indicating that PHP >= 8.0
+      - uses: nanasess/setup-php@master
+        with:
+          php-version: '7.2'
       - name: setup
         run: sudo -E tests/system-setup/remote-nextcloud-docker.sh upgrade basic
       - name: test-runner