diff --git a/tests/Fake/app/composer.json b/tests/Fake/app/composer.json
index 1b16267..056eb64 100644
--- a/tests/Fake/app/composer.json
+++ b/tests/Fake/app/composer.json
@@ -16,7 +16,7 @@
     "require-dev": {
         "bear/devtools": "^0.1",
         "bamarni/composer-bin-plugin": "^1.4",
-        "phpunit/phpunit": "^9.5",
+        "phpunit/phpunit": "^9.6.15",
         "roave/security-advisories": "dev-master"
     },
     "autoload": {