Laravel and phpunit - can't reach tests

I'm starting with tests in Laravel and now i can't reach my tests using phpunit.

The version of Laravel i'm using is 5.0.

OS is centos7 with php 5.6.

So, the first code i wrote is a duplicate of a existent function in the ExampleTest.php file, stored into "tests" folder, like this:

<?php

class ExampleTest extends TestCase {

	/**
	 * A basic functional test example.
	 *
	 * @return void
	 */
	public function testBasicExample()
	{
		//1 - verificando se a home devolve codigo 200
		$response = $this->call('GET', '/');
		$this->assertEquals(200, $response->getStatusCode());
	}

	public function testBasicExample2()
	{
		//1 - verificando se a home devolve codigo 200
		$response = $this->call('GET', '/');
		$this->assertEquals(200, $response->getStatusCode());
	}


}

This code is only for learning purposes and the goal here is make phpunit run both functions testBasicExample and testBasicExample2.

Te next step is running phpunit. In my case, i had to go to the vendor/phpunit directory and run command "php phpunit". Then, the command returned an error: Laravel 5 Failed opening required bootstrap/../vendor/autoload.php

So, i followed the best answer and i run "composer update" into terminal.

Ok, now i can run "php phpunit", but it run other tests and i can't see my exampletest return.

If some more data is needed, please just ask. Any help is apreciated.

Thanks in advance.