Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
| 1 | <?php | ||
| 8 | class JwtServiceTest extends PHPUnit_Framework_TestCase | ||
|  | |||
| 9 | { | ||
| 10 | |||
| 11 | /** | ||
| 12 | * @var Mockery\MockInterface | ||
| 13 | */ | ||
| 14 | private $tokenManager; | ||
| 15 | |||
| 16 | /** | ||
| 17 | * @var JwtService | ||
| 18 | */ | ||
| 19 | private $jwtService; | ||
| 20 | |||
| 21 | /** | ||
| 22 | * setUp method | ||
| 23 | */ | ||
| 24 | public function setUp() | ||
| 41 | |||
| 42 | /** | ||
| 43 | * tearDown method | ||
| 44 | */ | ||
| 45 | public function tearDown() | ||
| 51 | |||
| 52 | /** | ||
| 53 | * testGetTokenForUser method | ||
| 54 | */ | ||
| 55 | public function testGetTokenForUser() | ||
| 69 | |||
| 70 | /** | ||
| 71 | * testGetUserIdFromToken method | ||
| 72 | */ | ||
| 73 | View Code Duplication | public function testGetUserIdFromToken() | |
| 89 | |||
| 90 | /** | ||
| 91 | * testGetUserIdFromTokenWithInvalidClaim method | ||
| 92 | */ | ||
| 93 | View Code Duplication | public function testGetUserIdFromTokenWithInvalidClaim() | |
| 109 | |||
| 110 | /** | ||
| 111 | * getToken method | ||
| 112 | * | ||
| 113 | * @param int $ttl | ||
| 114 | * @return string | ||
| 115 | */ | ||
| 116 | protected function getToken($ttl = 100) | ||
| 154 | |||
| 155 | } | 
You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.