diff --git a/test/invertKeyValues/invertKeyValues.test.js b/test/invertKeyValues/invertKeyValues.test.js
index 41c0a4bc0..d51d06314 100644
--- a/test/invertKeyValues/invertKeyValues.test.js
+++ b/test/invertKeyValues/invertKeyValues.test.js
@@ -5,7 +5,8 @@ test('Testing invertKeyValues', (t) => {
 	//For more information on all the methods supported by tape
 	//Please go to https://github.com/substack/tape
 	t.true(typeof invertKeyValues === 'function', 'invertKeyValues is a Function');
-	t.deepEqual(invertKeyValues({ name: 'John', age: 20 }), { 20: 'age', John: 'name' }, "Inverts the key-value pairs of an object");
+  t.deepEqual(invertKeyValues({ a: 1, b: 2, c: 1 }), { 1: [ 'a', 'c' ], 2: [ 'b' ] }, "invertKeyValues({ a: 1, b: 2, c: 1 }) returns { 1: [ 'a', 'c' ], 2: [ 'b' ] }");
+  t.deepEqual(invertKeyValues({ a: 1, b: 2, c: 1 }, value => 'group' + value), { group1: [ 'a', 'c' ], group2: [ 'b' ] }, "invertKeyValues({ a: 1, b: 2, c: 1 }, value => 'group' + value) returns { group1: [ 'a', 'c' ], group2: [ 'b' ] }");
 	//t.deepEqual(invertKeyValues(args..), 'Expected');
 	//t.equal(invertKeyValues(args..), 'Expected');
 	//t.false(invertKeyValues(args..), 'Expected');