diff --git a/tests/forms_tests/field_tests/test_multivaluefield.py b/tests/forms_tests/field_tests/test_multivaluefield.py
index e7d161fb5b4..3d171686189 100644
--- a/tests/forms_tests/field_tests/test_multivaluefield.py
+++ b/tests/forms_tests/field_tests/test_multivaluefield.py
@@ -29,9 +29,6 @@ class ComplexMultiWidget(MultiWidget):
             ]
         return [None, None, None]
 
-    def format_output(self, rendered_widgets):
-        return '\n'.join(rendered_widgets)
-
 
 class ComplexField(MultiValueField):
     def __init__(self, required=True, widget=None, label=None, initial=None):
diff --git a/tests/forms_tests/widget_tests/test_multiwidget.py b/tests/forms_tests/widget_tests/test_multiwidget.py
index bf9ef38a6be..02cbe10c7ca 100644
--- a/tests/forms_tests/widget_tests/test_multiwidget.py
+++ b/tests/forms_tests/widget_tests/test_multiwidget.py
@@ -34,9 +34,6 @@ class ComplexMultiWidget(MultiWidget):
             ]
         return [None, None, None]
 
-    def format_output(self, rendered_widgets):
-        return '\n'.join(rendered_widgets)
-
 
 class ComplexField(MultiValueField):
     def __init__(self, required=True, widget=None, label=None, initial=None):