diff --git a/src/go.chromium.org/tast-tests/cros/local/bundles/cros/diagnostics/input_check_regional_key.go b/src/go.chromium.org/tast-tests/cros/local/bundles/cros/diagnostics/input_check_regional_key.go
index f47ed5a..2cf0407 100644
--- a/src/go.chromium.org/tast-tests/cros/local/bundles/cros/diagnostics/input_check_regional_key.go
+++ b/src/go.chromium.org/tast-tests/cros/local/bundles/cros/diagnostics/input_check_regional_key.go
@@ -65,6 +65,10 @@
 		s.Fatal("Failed to connect Test API: ", err)
 	}
 
+	if err := ash.SetTabletModeEnabled(ctx, tconn, false); err != nil {
+		s.Error("Failed to disable tablet mode: ", err)
+	}
+
 	if err = apps.Launch(ctx, tconn, apps.Diagnostics.ID); err != nil {
 		s.Fatal("Failed to launch diagnostics app")
 	}