Output made while test is running is printed although expectOutputString() is used when an assertion fails

[sebastianbergmann]

<?php
class Test extends PHPUnit_Framework_TestCase
{
    public function testOne()
    {
        $this->expectOutputString('*');

        print "*";

        $this->assertTrue(false);
    }
}

$ phpunit Test
PHPUnit 4.3.2 by Sebastian Bergmann.

F*

Time: 45 ms, Memory: 4.00Mb

There was 1 failure:

1) Test::testOne
Failed asserting that false is true.

/home/sb/Test.php:10

FAILURES!
Tests: 1, Assertions: 1, Failures: 1.