diff --git a/test/average/average.test.js b/test/average/average.test.js
index ae62e1dae..c38a2ee5c 100644
--- a/test/average/average.test.js
+++ b/test/average/average.test.js
@@ -5,10 +5,20 @@ test('Testing average', (t) => {
 	//For more information on all the methods supported by tape
 	//Please go to https://github.com/substack/tape
   t.true(typeof average === 'function', 'average is a Function');
-  t.equal(average(9, 1), 5, 'The average of 1 & 9 is 5');
-	//t.deepEqual(average(args..), 'Expected');
-	//t.equal(average(args..), 'Expected');
-	//t.false(average(args..), 'Expected');
-	//t.throws(average(args..), 'Expected');
+  t.true(average(true) === 1, 'average(true) returns 0');
+  t.true(average(false) === 0, 'average(false) returns 1');
+  t.equal(average(9, 1), 5, 'average(9, 1) returns 5');
+	t.equal(average(153, 44, 55, 64, 71, 1122, 322774, 2232, 23423, 234, 3631), 32163.909090909092, 'average(153, 44, 55, 64, 71, 1122, 322774, 2232, 23423, 234, 3631) returns 32163.909090909092 ');
+	t.equal(average(1, 2, 3), 2, 'average(1, 2, 3) returns 2');
+  t.equal(average(null), 0, 'average(null) returns 0');
+	t.true(isNaN(average(undefined)), 'average(1, 2, 3) returns NaN');
+	t.true(isNaN(average('String')), 'average(String) returns NaN');
+	t.true(isNaN(average({ a: 123})), 'average({ a: 123}) returns NaN');
+	t.true(isNaN(average([undefined, 0, 'string'])), 'average([undefined, 0, string]) returns NaN');
+
+  let start = new Date().getTime();
+  average(153, 44, 55, 64, 71, 1122, 322774, 2232, 23423, 234, 3631);
+  let end = new Date().getTime();  
+  t.true((end - start) < 2000, 'head([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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