diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6dee415f4..2d3e248bf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,6 +35,7 @@ jobs:
           - { version: '8.2', phpunit: '^9.6.21' }
           - { version: '8.3', phpunit: '^9.6.21' }
           - { version: '8.4', phpunit: '^9.6.21' }
+          - { version: '8.5', phpunit: '^9.6.21' }
         dependencies:
           - lowest
           - highest