diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index d5c5bb64..84ea4bd3 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -54,4 +54,4 @@ jobs:
 
       - name: Run tests
         run: |
-          SYMFONY_DEPRECATIONS_HELPER=weak vendor/bin/simple-phpunit ${PHPUNIT_FLAGS}
+          SYMFONY_DEPRECATIONS_HELPER=weak SYMFONY_PHPUNIT_REQUIRE="nikic/php-parser:^4.9" vendor/bin/simple-phpunit ${PHPUNIT_FLAGS}