As demonstrated in laravel/framework#17699 it is possible to have phpunit being installed with a lower than `5.7.0`, which doesn't work at all on 5.4 due to the changes with PHPUnit namespaced class.
@@ -12,7 +12,7 @@
"require-dev": {
"fzaninotto/faker": "~1.4",
"mockery/mockery": "0.9.*",
- "phpunit/phpunit": "~5.0"
+ "phpunit/phpunit": "~5.7"
},
"autoload": {
"classmap": [