diff --git a/src/crispy_forms_gds/layout/content.py b/src/crispy_forms_gds/layout/content.py
index 2bd52ad..0e2226e 100644
--- a/src/crispy_forms_gds/layout/content.py
+++ b/src/crispy_forms_gds/layout/content.py
@@ -298,7 +298,7 @@ def warning(cls, content):
             <div class="govuk-warning-text">
               <span class="govuk-warning-text__icon" aria-hidden="true">!</span>
               <strong class="govuk-warning-text__text">
-                <span class="govuk-warning-text__assistive">Warning</span>
+                <span class="govuk-visually-hidden>Warning</span>
                 %s
               </strong>
             </div>