diff --git a/test/last/last.test.js b/test/last/last.test.js
index d17d65c90..528a363ab 100644
--- a/test/last/last.test.js
+++ b/test/last/last.test.js
@@ -5,10 +5,17 @@ test('Testing last', (t) => {
 	//For more information on all the methods supported by tape
 	//Please go to https://github.com/substack/tape
 	t.true(typeof last === 'function', 'last is a Function');
-	t.equal(last([1, 2, 3]), 3, "Returns the last element in an array");
-	//t.deepEqual(last(args..), 'Expected');
-	//t.equal(last(args..), 'Expected');
-	//t.false(last(args..), 'Expected');
-	//t.throws(last(args..), 'Expected');
+  t.true(last({ a: 1234}) === undefined, 'last({ a: 1234}) returns undefined');
+  t.equal(last([1, 2, 3]), 3, "last([1, 2, 3]) returns 3");
+  t.equal(last({ 0: false}), undefined, 'last({ 0: false}) returns undefined');
+	t.equal(last('String'), 'g', 'last(String) returns g');
+  t.throws(() => last(null), 'last(null) throws an Error');
+  t.throws(() => last(undefined), 'last(undefined) throws an Error');
+  t.throws(() => last(), 'last() throws an Error');
+
+  let start = new Date().getTime();
+  last([1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 1122, 32124, 23232]);
+  let end = new Date().getTime();
+  t.true((end - start) < 2000, 'last([1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 1122, 32124, 23232]) takes less than 2s to run');
 	t.end();
 });
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