diff --git a/deform/tests/test_template.py b/deform/tests/test_template.py
index 23d35bfc..d7824158 100644
--- a/deform/tests/test_template.py
+++ b/deform/tests/test_template.py
@@ -166,7 +166,7 @@ def test_call_defaultdir(self):
             str(
                 '<div class="form-check"> '
                 '<input type="checkbox" name="name" value="true" '
-                'id="oid" class="form-check-input "/> '
+                'id="oid" class="form-check-input " required="required"/> '
                 '</div>'
             ),
         )