diff --git a/tests/TestCase/Model/Table/RequestTableTest.php b/tests/TestCase/Model/Table/RequestTableTest.php
index 8fb02690f..4bead8a79 100644
--- a/tests/TestCase/Model/Table/RequestTableTest.php
+++ b/tests/TestCase/Model/Table/RequestTableTest.php
@@ -83,7 +83,9 @@ public function testGc()
     {
         /** @var \PHPUnit\Framework\MockObject\MockObject&\DebugKit\Model\Table\RequestsTable $requestsTableMock */
         $requestsTableMock = $this->getMockForModel('DebugKit.Requests', ['shouldGc']);
-        $requestsTableMock->method('shouldGc')
+        $requestsTableMock
+            ->expects($this->atLeastOnce())
+            ->method('shouldGc')
             ->willReturn(true);
 
         $data = array_fill(0, 10, [
diff --git a/tests/test_app/templates/Error/error400.php b/tests/test_app/templates/Error/error400.php
new file mode 100644
index 000000000..90e3dd851
--- /dev/null
+++ b/tests/test_app/templates/Error/error400.php
@@ -0,0 +1 @@
+Error 400!
diff --git a/tests/test_app/templates/Error/error500.php b/tests/test_app/templates/Error/error500.php
index e69de29bb..8c5a75db6 100644
--- a/tests/test_app/templates/Error/error500.php
+++ b/tests/test_app/templates/Error/error500.php
@@ -0,0 +1 @@
+Error 500!