diff --git a/core/modules/aggregator/src/Tests/AddFeedTest.php b/core/modules/aggregator/src/Tests/AddFeedTest.php
index b66ac55..ef70cd1 100644
--- a/core/modules/aggregator/src/Tests/AddFeedTest.php
+++ b/core/modules/aggregator/src/Tests/AddFeedTest.php
@@ -59,7 +59,7 @@ public function testFeedLabelEscaping() {
     $this->assertEqual((string) $result[0], 'Test feed title alert(123);');
 
     // Ensure the feed icon title is escaped.
-    $this->assertRaw('class="feed-icon">  Subscribe to Test feed title &lt;script&gt;alert(123);&lt;/script&gt; feed</a>');
+    $this->assertTrue(strpos(str_replace(["\n", "\r"], '', $this->getRawContent()), 'class="feed-icon">  Subscribe to Test feed title &lt;script&gt;alert(123);&lt;/script&gt; feed</a>') !== FALSE);
   }
 
   /**