diff --git a/tests/Middleware/RouterTest.php b/tests/Middleware/RouterTest.php
index 3f5554e..42df4cd 100644
--- a/tests/Middleware/RouterTest.php
+++ b/tests/Middleware/RouterTest.php
@@ -244,7 +244,7 @@ public function testImmutability(): void
     {
         $original = $this->createRouterMiddleware();
 
-        $this->assertNotSame($original, $original->ignoreMethodFailureHandle());
+        $this->assertNotSame($original, $original->ignoreMethodFailureHandler());
         $this->assertNotSame($original, $original->withNotAllowedResponseFactory($this->createNotAllowedResponseFactory()));
         $this->assertNotSame($original, $original->withOptionsResponseFactory($this->createOptionsResponseFactory()));
     }