diff --git a/docs/ref/forms/widgets.txt b/docs/ref/forms/widgets.txt
index 93149090a1..5569e38b47 100644
--- a/docs/ref/forms/widgets.txt
+++ b/docs/ref/forms/widgets.txt
@@ -527,7 +527,7 @@ Selector and checkbox widgets
 
     .. attribute:: CheckboxInput.check_test
 
-        A callable that takes the value of the CheckBoxInput and returns
+        A callable that takes the value of the ``CheckboxInput`` and returns
         ``True`` if the checkbox should be checked for that value.
 
 ``Select``