diff --git a/tests/lib/Comments/CommentTest.php b/tests/lib/Comments/CommentTest.php
index 6f67356cca..fd76f443df 100644
--- a/tests/lib/Comments/CommentTest.php
+++ b/tests/lib/Comments/CommentTest.php
@@ -144,7 +144,9 @@ class CommentTest extends TestCase {
 			[
 				'@foobar and @barfoo you should know, @foo@bar.com is valid' .
 					' and so is @bar@foo.org@foobar.io I hope that clarifies everything.' .
-					' cc @23452-4333-54353-2342 @yolo!',
+					' cc @23452-4333-54353-2342 @yolo!' .
+					' however the most important thing to know is that www.croissant.com/@oil is not valid' .
+					' and won\'t match anything at all',
 				['foobar', 'barfoo', 'foo@bar.com', 'bar@foo.org@foobar.io', '23452-4333-54353-2342', 'yolo']
 			]