diff --git a/tests/unit/Grav/Common/Helpers/ExcerptsTest.php b/tests/unit/Grav/Common/Helpers/ExcerptsTest.php
index dd0fde834..0cc48a4e9 100644
--- a/tests/unit/Grav/Common/Helpers/ExcerptsTest.php
+++ b/tests/unit/Grav/Common/Helpers/ExcerptsTest.php
@@ -78,7 +78,8 @@ class ExcerptsTest extends \Codeception\TestCase\Test
     {
         $this->assertRegexp('|<img alt="Sample Image" src="\/images\/.*-sample-image.jpe?g\" data-src="sample-image\.jpg\?cropZoom=300,300" \/>|',
             Excerpts::processImageHtml('<img src="sample-image.jpg?cropZoom=300,300" alt="Sample Image" />', $this->page));
-
+        $this->assertRegexp('|<img alt="Sample Image" class="foo" src="\/images\/.*-sample-image.jpe?g\" data-src="sample-image\.jpg\?classes=foo" \/>|',
+            Excerpts::processImageHtml('<img src="sample-image.jpg?classes=foo" alt="Sample Image" />', $this->page));
     }
 
 }