diff --git a/tests/php/Forms/HTMLEditor/HTMLEditorFieldTest.php b/tests/php/Forms/HTMLEditor/HTMLEditorFieldTest.php
index 97012e45b45..d3519c66c8c 100644
--- a/tests/php/Forms/HTMLEditor/HTMLEditorFieldTest.php
+++ b/tests/php/Forms/HTMLEditor/HTMLEditorFieldTest.php
@@ -180,7 +180,7 @@ public function testReadonlyField()
         $this->assertEquals(
             <<<EOS
 <span class="readonly typography" id="Content">
-	<img src="/assets/HTMLEditorFieldTest/f5c7c2f814/example__ResizedImageWzEwLDIwXQ.jpg" alt="" width="10" height="20">
+	<img src="/assets/HTMLEditorFieldTest/f5c7c2f814/example__ResizedImageWzEwLDIwXQ.jpg" alt="" width="10" height="20" loading="lazy">
 </span>
 
 
@@ -197,7 +197,7 @@ public function testReadonlyField()
         $this->assertEquals(
             <<<EOS
 <span class="readonly typography" id="Content">
-	<img src="/assets/HTMLEditorFieldTest/f5c7c2f814/example__ResizedImageWzEwLDIwXQ.jpg" alt="" width="10" height="20">
+	<img src="/assets/HTMLEditorFieldTest/f5c7c2f814/example__ResizedImageWzEwLDIwXQ.jpg" alt="" width="10" height="20" loading="lazy">
 </span>
 
 	<input type="hidden" name="Content" value="[image src=&quot;/assets/HTMLEditorFieldTest/f5c7c2f814/example.jpg&quot; width=&quot;10&quot; height=&quot;20&quot; id=&quot;{$fileID}&quot;]" />