diff --git a/config/runner/toolkit-test.yml b/config/runner/toolkit-test.yml
index 29a65842e..a0e20ee48 100644
--- a/config/runner/toolkit-test.yml
+++ b/config/runner/toolkit-test.yml
@@ -78,7 +78,7 @@ toolkit:
         - src
     phpstan:
       config: phpstan.neon
-      level: '1'
+      level: '6'
       includes:
         - vendor/mglaman/phpstan-drupal/extension.neon
         - vendor/mglaman/phpstan-drupal/rules.neon