diff --git a/src/Rules/CarbonCopyRule.php b/src/Rules/CarbonCopyRule.php
index 90fd211..6b90d35 100644
--- a/src/Rules/CarbonCopyRule.php
+++ b/src/Rules/CarbonCopyRule.php
@@ -47,7 +47,9 @@ public function processNode(Node $node, Scope $scope): array
             $scope,
             $node->var,
             '',
-            static fn (Type $type): bool => $type->canCallMethods()->yes() && $type->hasMethod($name)->yes()
+            static function (Type $type) use ($name): bool {
+                return $type->canCallMethods()->yes() && $type->hasMethod($name)->yes();
+            }
         );
 
         $type = $typeResult->getType();
diff --git a/tests/RulesTest.php b/tests/RulesTest.php
index 5d6b07d..dc63b9e 100644
--- a/tests/RulesTest.php
+++ b/tests/RulesTest.php
@@ -37,6 +37,8 @@ protected function findErrorsByLine(string $filename): array
     {
         $errors = $this->findErrors(realpath($filename));
 
-        return collect($errors['messages'] ?? [])->mapWithKeys(fn ($message) => [$message['line'] => $message['message']])->toArray();
+        return collect($errors['messages'] ?? [])->mapWithKeys(function ($message) {
+            return [$message['line'] => $message['message']];
+        })->toArray();
     }
 }