Error test for debug support, try to print out the error

Set correct phpunit version too

test/phpunit/Debug/CoreLibsDebugSupportTest.php

@@ -463,7 +463,6 @@ final class CoreLibsDebugSupportTest extends TestCase
 	 * @testWith ["vendor/phpunit/phpunit/src/Framework/TestCase.php:6434","phar:///home/clemens/.phive/phars/phpunit-9.6.13.phar/phpunit/Framework/TestCase.php:6434"]
 	 * @testdox getCallerFileLine check based on regex .../Framework/TestCase.php:\d+ [$_dataName]
 	 *
-	 * @param  string $expected
 	 * @return void
 	 */
 	public function testGetCallerFileLine(): void
@@ -479,7 +478,8 @@ final class CoreLibsDebugSupportTest extends TestCase
 			. "\/Framework\/TestCase.php:\d+$/";
 		$this->assertMatchesRegularExpression(
 			$regex,
-			Support::getCallerFileLine()
+			Support::getCallerFileLine(),
+			'Failed for: ' . Support::getCallerFileLine()
 		);
 	}