diff --git a/src/TestSuite/Stub/TestExceptionRenderer.php b/src/TestSuite/Stub/TestExceptionRenderer.php
index eac45c906a8..c4aff4b6ce4 100644
--- a/src/TestSuite/Stub/TestExceptionRenderer.php
+++ b/src/TestSuite/Stub/TestExceptionRenderer.php
@@ -18,12 +18,25 @@
 
 /**
  * Test Exception Renderer.
+ *
+ * You can use this class if you want to re-throw exceptions that else would
+ * be caught by the ErrorHandlerMiddleware.
+ * This is useful while debugging or writitng integration test cases.
+ *
+ * ```
+ * use Cake\Core\Configure;
+ * use Cake\TestSuite\Stub\TestExceptionRenderer;
+ *
+ * Configure::write('Error.exceptionRenderer', TestExceptionRenderer::class);
+ * ```
+ *
+ * @see \Cake\TestSuite\IntegrationTestCase::disableErrorHandlerMiddleware()
  */
 class TestExceptionRenderer
 {
 
     /**
-     * Constructor
+     * Simply rethrows the given exception
      *
      * @param \Exception $exception Exception.
      * @return void
diff --git a/tests/TestCase/TestSuite/IntegrationTestCaseTest.php b/tests/TestCase/TestSuite/IntegrationTestCaseTest.php
index 73c5b4a0fb0..3ec8369e589 100644
--- a/tests/TestCase/TestSuite/IntegrationTestCaseTest.php
+++ b/tests/TestCase/TestSuite/IntegrationTestCaseTest.php
@@ -923,7 +923,7 @@ public function testAssertFileNoFile()
     }
 
     /**
-     * undocumented function
+     * Test disabling the error handler middleware.
      *
      * @expectedException \Cake\Routing\Exception\MissingRouteException
      * @expectedExceptionMessage A route matching "/foo" could not be found.