diff --git a/tests/Composer/Test/Json/JsonFileTest.php b/tests/Composer/Test/Json/JsonFileTest.php
index f918d538b..55bf603ea 100644
--- a/tests/Composer/Test/Json/JsonFileTest.php
+++ b/tests/Composer/Test/Json/JsonFileTest.php
@@ -200,6 +200,7 @@ class JsonFileTest extends \PHPUnit_Framework_TestCase
             $this->fail();
         } catch (JsonValidationException $e) {
             $this->assertContains($text, $e->getMessage());
+            $this->assertNotEmpty($e->getErrors());
         }
     }