protected function findTestClasses($testBaseClass = null)
{
$reflectionClassFactory = $this->reflectionClassFactory;
$testBaseClass = $testBaseClass ?: __NAMESPACE__ . '\\test';
return array_filter($this->adapter->get_declared_classes(), function ($class) use($reflectionClassFactory, $testBaseClass) {
$class = $reflectionClassFactory($class);
return $class->isSubClassOf($testBaseClass) === true && $class->isAbstract() === false;
});
}