diff --git a/lib/a11y-snapshot/__snapshots__/material-ui.test.js.snap b/lib/a11y-snapshot/__snapshots__/material-ui.test.js.snap
index 7a47b83d2..42e540299 100644
--- a/lib/a11y-snapshot/__snapshots__/material-ui.test.js.snap
+++ b/lib/a11y-snapshot/__snapshots__/material-ui.test.js.snap
@@ -22107,7 +22107,7 @@ exports[`firefox /components/dialogs/ 1`] = `
   <text>
     import useMediaQuery from '@material-ui/core/useMediaQuery';
     function MyComponent() { const theme = useTheme(); const fullScreen =
-    useMediaQuery(theme.breakpoints.down('sm')); return <Dialog
+    useMediaQuery(theme.breakpoints.down('md')); return <Dialog
     fullScreen={fullScreen} />; }
   </text>
   <button>