diff --git a/.travis.yml b/.travis.yml
index d6a2419b..85850ddc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,6 +19,7 @@ before_script:
 script:
   - ./vendor/bin/phpunit --coverage-clover ./build/logs/clover.xml
   - composer cs
+  - composer static
 
 after_script:
   - bash <(curl -s https://codecov.io/bash)
diff --git a/phpstan.neon b/phpstan.neon
index 9d52fd98..208d953f 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,2 +1,6 @@
 parameters:
     checkMissingIterableValueType: false
+    ignoreErrors:
+        -
+            message: '#ArrayUtil::mapWithKeys() should return array but returns array|false#'
+            path: src/Util/ArrayUtil.php