diff --git a/.github/workflows/phpunit-tests.yml b/.github/workflows/phpunit-tests.yml
index 81afd70449141..7c286d68553c6 100644
--- a/.github/workflows/phpunit-tests.yml
+++ b/.github/workflows/phpunit-tests.yml
@@ -318,7 +318,9 @@ jobs:
       php: ${{ matrix.php }}
       db-version: ${{ matrix.db-version }}
       db-type: ${{ matrix.db-type }}
+      multisite: ${{ matrix.multisite }}
       memcached: ${{ matrix.memcached || false }}
+      phpunit-config: ${{ matrix.multisite && 'tests/phpunit/multisite.xml' || 'phpunit.xml.dist' }}
       phpunit-test-groups: ${{ matrix.phpunit-test-groups || '' }}
 
   slack-notifications: