diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 407424722b6..15e7f0fc6a2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -998,6 +998,8 @@ jobs:
     name: PHPUnit (PHP ${{ matrix.php }}) (Symfony lowest)
     runs-on: ubuntu-latest
     timeout-minutes: 20
+    env:
+      SYMFONY_PHPUNIT_VERSION: '9.5'
     strategy:
       matrix:
         php: