Test cleanup and fixes [e-f]

test/findLastKey/findLastKey.test.js

@@ -1,17 +1,15 @@
 const expect = require('expect');
 const findLastKey = require('./findLastKey.js');
 
-
-  test('findLastKey is a Function', () => {
+test('findLastKey is a Function', () => {
   expect(findLastKey).toBeInstanceOf(Function);
 });
-  t.equal(findLastKey(
+test('eturns the appropriate key', () => {
+  expect(findLastKey(
   {
     barney: { age: 36, active: true },
     fred: { age: 40, active: false },
     pebbles: { age: 1, active: true }
   },
-  o => o['active']
-), 'pebbles', 'Returns the appropriate key');
-  
-
+  o => o['active']).toBe('pebbles');
+});