diff --git a/js/buoyancy/model/BuoyancyShapesModel.ts b/js/buoyancy/model/BuoyancyShapesModel.ts
index e139a3b4..54fc3ba1 100644
--- a/js/buoyancy/model/BuoyancyShapesModel.ts
+++ b/js/buoyancy/model/BuoyancyShapesModel.ts
@@ -51,6 +51,7 @@ export default class BuoyancyShapesModel extends DensityBuoyancyModel {
 
   public constructor( providedOptions: BuoyancyShapesModelOptions ) {
     const options = optionize<DensityBuoyancyModelOptions, EmptySelfOptions>()( {
+      // @ts-expect-error TODO JO: this looks like a typescript bug, and not a runtime problem, https://github.com/phetsims/chipper/issues/1360
       initialForceScale: 1 / 4
     }, providedOptions );
 
diff --git a/js/common/model/Cuboid.ts b/js/common/model/Cuboid.ts
index fafb65eb..daf27416 100644
--- a/js/common/model/Cuboid.ts
+++ b/js/common/model/Cuboid.ts
@@ -15,7 +15,6 @@ import Vector2 from '../../../../dot/js/Vector2.js';
 import Vector3 from '../../../../dot/js/Vector3.js';
 import { Shape } from '../../../../kite/js/imports.js';
 import optionize, { EmptySelfOptions } from '../../../../phet-core/js/optionize.js';
-import Tandem from '../../../../tandem/js/Tandem.js';
 import IOType from '../../../../tandem/js/types/IOType.js';
 import densityBuoyancyCommon from '../../densityBuoyancyCommon.js';
 import Mass, { InstrumentedMassOptions, MASS_MAX_SHAPES_DIMENSION, MASS_MIN_SHAPES_DIMENSION, MassIOStateObject } from './Mass.js';
@@ -38,8 +37,6 @@ export default class Cuboid extends Mass {
       shape: Shape.rect( size.minX, size.minY, size.width, size.height ),
       volume: size.width * size.height * size.depth,
       massShape: MassShape.BLOCK,
-
-      tandem: Tandem.OPTIONAL,
       phetioType: Cuboid.CuboidIO
     }, providedConfig );
 
diff --git a/js/common/view/DensityBuoyancyScreenView.ts b/js/common/view/DensityBuoyancyScreenView.ts
index d90e50b2..5f24b2ef 100644
--- a/js/common/view/DensityBuoyancyScreenView.ts
+++ b/js/common/view/DensityBuoyancyScreenView.ts
@@ -28,7 +28,7 @@ import arrayRemove from '../../../../phet-core/js/arrayRemove.js';
 import optionize from '../../../../phet-core/js/optionize.js';
 import PhetFont from '../../../../scenery-phet/js/PhetFont.js';
 import ResetAllButton from '../../../../scenery-phet/js/buttons/ResetAllButton.js';
-import { AlignBox, animatedPanZoomSingleton, TInputListener, Image, LinearGradient, Mouse, Node, Pointer, Rectangle, SceneryEvent, Text } from '../../../../scenery/js/imports.js';
+import { AlignBox, animatedPanZoomSingleton, Image, LinearGradient, Mouse, Node, Pointer, Rectangle, SceneryEvent, Text, TInputListener } from '../../../../scenery/js/imports.js';
 import Checkbox from '../../../../sun/js/Checkbox.js';
 import EventType from '../../../../tandem/js/EventType.js';
 import Tandem from '../../../../tandem/js/Tandem.js';
@@ -123,7 +123,6 @@ export default class DensityBuoyancyScreenView<Model extends DensityBuoyancyMode
       cameraLookAt: DensityBuoyancyCommonConstants.BUOYANCY_CAMERA_LOOK_AT,
       cameraPosition: new Vector3( 0, 0.2, 2 ).timesScalar( scaleIncrease ),
       cameraZoom: 1.75 * scaleIncrease,
-      tandem: Tandem.REQUIRED,
 
       preventFit: true
     }, providedOptions );