diff --git a/js/__tests__/utils-test.js b/js/__tests__/utils-test.js
index ab660f8b..c80da491 100644
--- a/js/__tests__/utils-test.js
+++ b/js/__tests__/utils-test.js
@@ -3,12 +3,7 @@ jest.unmock('../utils');
 import {
   getTimeObj,
   getTimeStr,
-  getBalanceText,
-  getVolumeText,
-  getPositionText,
-  getMediaText,
-  getDoubleSizeModeText,
-  wrapForMarquee
+  clamp
 } from '../utils';
 
 describe('getTimeObj', () => {
@@ -41,3 +36,21 @@ describe('getTimeStr', () => {
     expect(actual).toEqual(expected);
   });
 });
+
+describe('clamp', () => {
+  it('respects the max value', () => {
+    const actual = clamp(101, 0, 100);
+    const expected = 100;
+    expect(actual).toEqual(expected);
+  });
+  it('respects the min value', () => {
+    const actual = clamp(0, 1, 100);
+    const expected = 1;
+    expect(actual).toEqual(expected);
+  });
+  it('respects the given value if in range', () => {
+    const actual = clamp(50, 0, 100);
+    const expected = 50;
+    expect(actual).toEqual(expected);
+  });
+});