@expectedExceptionMessageRegExp

use PHPUnit\Framework\TestCase;

class MyTest extends TestCase
{
     /**
      * @expectedException              MyException
      * @expectedExceptionMessageRegExp /Argument \d+ can not be an? \w+/
      */
     public function testExceptionHasRightMessage()
     {
         throw new MyException('Argument 2 can not be an integer');
     }
}