Typo

tests/cases/StandardTest.php

@@ -97,7 +97,7 @@ class StandardTest extends \PHPUnit\Framework\TestCase {
             $name = str_replace($base, "", $name);
             // perform some special handling for the standard unit test suite
             if (!$options && preg_match('/^microformats-v2-unit\//', $name)) {
-                if (preg_match('/^microformats-v2-unit\/(?!text\/)/', $name)) {
+                if (preg_match('/^microformats-v2-unit\/(?=text\/)/', $name)) {
                     // if we're doing standard textContent tests, do a single test with the correct option
                     yield $name => [$name, $path, ['thoroughTrim' => false]];
                 } else {