Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables2\libreria\vendor\guzzlehttp\streams\tests\UtilsTest.php:9 Stack trace: #0 {main} thrown in C:\MANTUM\xampp2\htdocs\MNT\ventasvariables2\libreria\vendor\guzzlehttp\streams\tests\UtilsTest.php on line 9