diff --git a/deform/tests/test_template.py b/deform/tests/test_template.py
index 8a50ea06..2171575a 100644
--- a/deform/tests/test_template.py
+++ b/deform/tests/test_template.py
@@ -165,7 +165,8 @@ def test_call_defaultdir(self):
             result,
             str(
                 '<div class="form-check"> '
-                '<input type="checkbox" name="name" value="true" id="oid" class="form-check-input "/> '
+                '<input type="checkbox" name="name" value="true" '
+                'id="oid" class="form-check-input "/> '
                 '</div>'
             ),
         )