Outputs both TAP and default PHPUnit formatting

Description:

When using the nikeee\PhpunitTap\TapExtension configured via the <extensions> block in phpunit.xml, both TAP formatted output and the default PHPUnit text output are shown. The expected behavior is to have only the TAP output printed to stdout.

Environment:

• PHPUnit Version: 11.5.7
• PHP Version: 8.4.3
• phpunit-tap : v2.0.1

Steps to Reproduce:

1. Create a project with the phpunit.xml configuration.

<?xml version="1.0" encoding="UTF-8"?>
<phpunit>
  <extensions>
    <bootstrap class="nikeee\PhpunitTap\TapExtension" />
  </extensions>
  <testsuites>
    <testsuite name="Example Test Suite">
      <directory suffix="Test.php">./tests</directory>
    </testsuite>
  </testsuites>
</phpunit>

2. Add a test file (e.g., tests/FunctionsTest.php) containing both passing tests and a failing test. For example:

   <?php
   // tests/FunctionsTest.php
   
   use PHPUnit\Framework\TestCase;
   
   // Include the procedural functions
   require_once __DIR__ . '/../src/functions.php';
   
   final class FunctionsTest extends TestCase
   {
       public function testAdd(): void
       {
           $this->assertEquals(5, add(2, 3));
       }
   
       public function testAddWithNegativeNumbers(): void
       {
           $this->assertEquals(-2, add(-1, -1));
       }
   
       public function testAddWillFail(): void
       {
           // Intentionally failing test: Expect 2 but add(1, 5) returns 6
           $this->assertEquals(2, add(1, 5), '1 + 5 should equal 6, but we fail on purpose');
       }
   }
   

3. Run PHPUnit from the command line:

   ./vendor/bin/phpunit
   

Actual Output:

./vendor/bin/phpunit 
PHPUnit 11.5.7 by Sebastian Bergmann and contributors.

Runtime:       PHP 8.4.3
Configuration: /path/to/projects/phpunit-tap-sandbox/phpunit.xml

..F                                                                 3 / 3 (100%)TAP version 13
1..3
ok - FunctionsTest::testAdd # time=4.389ms
ok - FunctionsTest::testAddWithNegativeNumbers # time=0.038ms
not ok - FunctionsTest::testAddWillFail # time=37.694ms
  ---
  message: 'Comparison Failure'
  severity: fail
  thrown: false
  actual: '6'
  expected: '2'
  ...

Time: 00:00.099, Memory: 8.00 MB

There was 1 failure:

1) FunctionsTest::testAddWillFail
1 + 5 should equal 6, but we fail on purpose here.
Failed asserting that 6 matches expected 2.

/path/to/projects/phpunit-tap-sandbox/tests/FunctionsTest.php:31

FAILURES!
Tests: 3, Assertions: 3, Failures: 1.

Expected Output:

Only the TAP formatted output should be printed (for example):

TAP version 13
1..3
ok - FunctionsTest::testAdd # time=...ms
ok - FunctionsTest::testAddWithNegativeNumbers # time=...ms
not ok - FunctionsTest::testAddWillFail # time=...ms
  ---
  ...

There should be no additional default PHPUnit summary output (header, progress dots, and final summary).

Please advise if this is an intended behavior, a configuration issue, or a bug. Any assistance or a workaround would be greatly appreciated.

Reproduce the issue using the phpunit.xml configuration, tests/FunctionsTest.php, and ./vendor/bin/phpunit. Start by reading the nikeee\PhpunitTap\TapExtension entry point and compare the captured stdout with the expected TAP-only output. Done means the extension emits TAP output without the default PHPUnit header, progress dots, or final summary.