diff --git a/test/utils/services/ColorGenerator.test.ts b/test/utils/services/ColorGenerator.test.ts
index 990b268e..b2d435ce 100644
--- a/test/utils/services/ColorGenerator.test.ts
+++ b/test/utils/services/ColorGenerator.test.ts
@@ -44,4 +44,19 @@ describe('ColorGenerator', () => {
     expect(storageMock.set).toHaveBeenCalledTimes(1);
     expect(storageMock.get).toHaveBeenCalledTimes(1);
   });
+
+  describe('isColorLightForKey', () => {
+    it.each([
+      [ '#4696e5', true ], // Shlink brand color
+      [ '#8A661C', false ],
+      [ '#F7BE05', true ],
+      [ '#5A02D8', false ],
+      [ '#202786', false ],
+    ])('returns that the color for a key is light based on the color assigned to that key', (color, isLight) => {
+      colorGenerator.setColorForKey('foo', color);
+
+      expect(isLight).toEqual(colorGenerator.isColorLightForKey('foo'));
+      expect(isLight).toEqual(colorGenerator.isColorLightForKey('foo')); // To cover when color is already calculated
+    });
+  });
 });