mondrake
--- a/core/tests/Drupal/KernelTests/Core/Test/PhpUnitTestDiscoveryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Test/PhpUnitTestDiscoveryTest.php
    $this->assertEquals(implode("\n", $phpUnitClientList), implode("\n", $internalList), self::TEST_LIST_MISMATCH_MESSAGE);
-
-    // PHPUnit's test discovery - via API.
-    $phpUnitConfiguration = (new Builder())->build(['--configuration', $configurationFilePath]);
-    $phpUnitTestSuite = (new TestSuiteBuilder())->build($phpUnitConfiguration);
-    $phpUnitApiList = [];
-    foreach ($phpUnitTestSuite->tests() as $testSuite) {
-      foreach ($testSuite->tests() as $test) {
-        $phpUnitApiList[] = $test->name();
-      }
-    }
-    asort($phpUnitApiList);
-
-    // Check against Drupal's discovery.
-    $this->assertEquals(implode("\n", $phpUnitApiList), implode("\n", $internalList), self::TEST_LIST_MISMATCH_MESSAGE);
-