Updated with my changes

unit-conversion/src/features/number-input-field/numberInputField.test.js

-// import { render, screen } from '@testing-library/react';
+import { render, screen } from '@testing-library/react';
 import '../../testing/mockRedux.js';
-// import { NumberInputField, internals } from './numberInputField.js';
+import { NumberInputField } from './numberInputField.js';
 import numberInputFieldSlice from '../number-input-field/numberInputFieldSlice.js';
 
 import {
   selectNumberOfUnits,
   setNumberOfUnits,
 } from './numberInputFieldSlice.js';
-/*
+
 import {
   selectCurrentInputUnit,
   selectCurrentOutputUnit,
 } from '../unit-selector/unitSelectorSlice.js';
-*/
 
 describe('the NumberInputField slice', () => {
   test('selects input value according to the store', () => {
@@ -52,7 +51,6 @@ jest.mock('../unit-selector/unitSelectorSlice.js', () => ({
   selectCurrentOutputUnit: jest.fn().mockName('selectCurrentOutputUnit'),
 }));
 
-/*
 describe('the NumberInputField component', () => {
   test('numberInputField displays apropriate content', () => {
     selectNumberOfUnits.mockReturnValue(10);
@@ -65,4 +63,3 @@ describe('the NumberInputField component', () => {
     );
   });
 });
-*/

unit-conversion/src/features/unit-selector/unitSelector.test.js

-// import { render, screen } from '@testing-library/react';
+import { render, screen } from '@testing-library/react';
 import '../../testing/mockRedux.js';
-// import { UnitSelector } from './unitSelector.js';
+import { UnitSelector } from './unitSelector.js';
 
-/*
 import {
   selectNumberOfUnits,
 } from '../number-input-field/numberInputFieldSlice.js';
-*/
 
 import unitSelectorSlice, {
   selectCurrentInputUnit,