--- /dev/null
+--TEST--
+#2158: Failure to run tests in separate processes if a file included into main process contains constant definition
+--FILE--
+<?php
+$_SERVER['argv'][1] = '--no-configuration';
+$_SERVER['argv'][2] = 'Issue2158Test';
+$_SERVER['argv'][3] = __DIR__ . '/2158/Issue2158Test.php';
+
+require __DIR__ . '/../../bootstrap.php';
+PHPUnit_TextUI_Command::main();
+?>
+--EXPECTF--
+PHPUnit %s by Sebastian Bergmann and contributors.
+
+%s
+
+Time: %s, Memory: %s
+
+OK (2 tests, 2 assertions)