diff --git a/test/isPrimitive/isPrimitive.test.js b/test/isPrimitive/isPrimitive.test.js
index 9a84bf949..2cebc77ff 100644
--- a/test/isPrimitive/isPrimitive.test.js
+++ b/test/isPrimitive/isPrimitive.test.js
@@ -5,17 +5,20 @@ test('Testing isPrimitive', (t) => {
 	//For more information on all the methods supported by tape
 	//Please go to https://github.com/substack/tape
 	t.true(typeof isPrimitive === 'function', 'isPrimitive is a Function');
-	t.equal(isPrimitive(null), true, "passed value is primitive");
-	t.equal(isPrimitive(50), true, "passed value is primitive");
-	t.equal(isPrimitive('Hello'), true, "passed value is primitive");
-	t.equal(isPrimitive(false), true, "passed value is primitive");
-	t.equal(isPrimitive(Symbol()), true, "passed value is primitive");
-	t.equal(isPrimitive([]), false, "passed value is primitive");
-
-
-	//t.deepEqual(isPrimitive(args..), 'Expected');
-	//t.equal(isPrimitive(args..), 'Expected');
-	//t.false(isPrimitive(args..), 'Expected');
-	//t.throws(isPrimitive(args..), 'Expected');
+  t.true(isPrimitive(null), "isPrimitive(null) is primitive");
+  t.true(isPrimitive(undefined), "isPrimitive(undefined) is primitive");
+  t.true(isPrimitive('string'), "isPrimitive(string) is primitive");
+	t.true(isPrimitive(true), "isPrimitive(true) is primitive");
+	t.true(isPrimitive(50), "isPrimitive(50) is primitive");
+	t.true(isPrimitive('Hello'), "isPrimitive('Hello') is primitive");
+	t.true(isPrimitive(false), "isPrimitive(false) is primitive");
+	t.true(isPrimitive(Symbol()), "isPrimitive(Symbol()) is primitive");
+	t.false(isPrimitive([1, 2, 3]), "isPrimitive([1, 2, 3]) is not primitive");
+  t.false(isPrimitive({ a: 123 }), "isPrimitive({ a: 123 }) is not primitive");
+  
+  let start = new Date().getTime();
+  isPrimitive({ a: 123 });
+  let end = new Date().getTime();  
+  t.true((end - start) < 2000, 'isPrimitive({ a: 123 }) takes less than 2s to run');
 	t.end();
 });
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