diff --git a/src/lint/ArcanistLintMessage.php b/src/lint/ArcanistLintMessage.php
--- a/src/lint/ArcanistLintMessage.php
+++ b/src/lint/ArcanistLintMessage.php
@@ -211,7 +211,7 @@
   }
 
   public function setDependentMessages(array $messages) {
-    assert_instances_of($messages, 'ArcanistLintMessage');
+    assert_instances_of($messages, __CLASS__);
     $this->dependentMessages = $messages;
     return $this;
   }