diff --git a/onegov/town/tests/test_utils.py b/onegov/town/tests/test_utils.py
index 46b5bff..0d8cc5b 100644
--- a/onegov/town/tests/test_utils.py
+++ b/onegov/town/tests/test_utils.py
@@ -4,12 +4,12 @@
 def test_annotate_html():
     html = "<p><img/></p><p></p>"
     assert utils.annotate_html(html) == (
-        '<p class="has-img"><img class="lazyload" src=""></p><p></p>'
+        '<p class="has-img"><img class="lazyload-alt"></p><p></p>'
     )
 
     html = "<p class='x'><img/></p><p></p>"
     assert utils.annotate_html(html) == (
-        '<p class="x has-img"><img class="lazyload" src=""></p><p></p>'
+        '<p class="x has-img"><img class="lazyload-alt"></p><p></p>'
     )
 
     html = "<strong></strong>"