diff --git a/framework/core/tests/integration/extenders/MiddlewareTest.php b/framework/core/tests/integration/extenders/MiddlewareTest.php
index c93cc3265..2519b4a58 100644
--- a/framework/core/tests/integration/extenders/MiddlewareTest.php
+++ b/framework/core/tests/integration/extenders/MiddlewareTest.php
@@ -26,6 +26,17 @@ class MiddlewareTest extends TestCase
         );
     }
 
+    /**
+     * @test
+     */
+    public function custom_header_is_not_present_by_default()
+    {
+        $response = $this->send($this->request('GET', '/'));
+
+        $this->assertEquals(200, $response->getStatusCode());
+        $this->assertArrayNotHasKey('X-First-Test-Middleware', $response->getHeaders());
+    }
+
     /**
      * @test
      */