diff --git a/js/demo/SoundOptionsDialogContent.js b/js/demo/SoundOptionsDialogContent.js
index d6c84011..0da80e34 100644
--- a/js/demo/SoundOptionsDialogContent.js
+++ b/js/demo/SoundOptionsDialogContent.js
@@ -1,5 +1,7 @@
 // Copyright 2020-2021, University of Colorado Boulder
 
+// @ts-nocheck
+
 import NumberProperty from '../../../axon/js/NumberProperty.js';
 import PhetFont from '../../../scenery-phet/js/PhetFont.js';
 import { Node } from '../../../scenery/js/imports.js';
diff --git a/js/demo/TamboKeyboardHelpContent.js b/js/demo/TamboKeyboardHelpContent.js
index 1eecba13..3c5a60f1 100644
--- a/js/demo/TamboKeyboardHelpContent.js
+++ b/js/demo/TamboKeyboardHelpContent.js
@@ -1,5 +1,7 @@
 // Copyright 2018-2021, University of Colorado Boulder
 
+// @ts-nocheck
+
 /**
  * Content for the "Keyboard Shortcuts" dialog that can be brought up from the sim navigation bar.  This is stubbed,
  * since we need it for testing but this sim is not meant to be used outside of PhET.