diff --git a/tests/get_tags_test.php b/tests/get_tags_test.php
index 68b43231b8..f1e4f76b0a 100644
--- a/tests/get_tags_test.php
+++ b/tests/get_tags_test.php
@@ -264,7 +264,7 @@ class GetTagsTest extends PHPUnit_Framework_TestCase {
 		$this->assertEquals("Test with @[url=http://justatest.de]Mike Lastname[/url] id tag", $text);
 		$this->assertEquals("@[url=http://justatest.de]Mike Lastname[/url]", $str_tags);
 		// this test may produce two cid:15 entries - which is OK because duplicates are pruned before delivery
-		$this->assertTrue(strstr($inform,"cid:15"));
+		$this->assertContains($inform,"cid:15");
 	}
 	
 	/**