Fix regression introduced in PHPUnit 9.6.33

Author: sebastianbergmann

ChangeLog-9.6.md

@@ -2,6 +2,12 @@
 
 All notable changes of the PHPUnit 9.6 release series are documented in this file using the [Keep a CHANGELOG](https://keepachangelog.com/) principles.
 
+## [9.6.34] - 2026-01-27
+
+### Fixed
+
+* Regression introduced in PHPUnit 9.6.33
+
 ## [9.6.33] - 2026-01-27
 
 ### Changed
@@ -224,6 +230,7 @@ All notable changes of the PHPUnit 9.6 release series are documented in this fil
 * [#5064](https://github.com/sebastianbergmann/phpunit/issues/5064): Deprecate `PHPUnit\Framework\TestCase::getMockClass()`
 * [#5132](https://github.com/sebastianbergmann/phpunit/issues/5132): Deprecate `Test` suffix for abstract test case classes
 
+[9.6.34]: https://github.com/sebastianbergmann/phpunit/compare/9.6.33...9.6.34
 [9.6.33]: https://github.com/sebastianbergmann/phpunit/compare/9.6.32...9.6.33
 [9.6.32]: https://github.com/sebastianbergmann/phpunit/compare/9.6.31...9.6.32
 [9.6.31]: https://github.com/sebastianbergmann/phpunit/compare/9.6.30...9.6.31

src/Runner/PhptTestCase.php

@@ -654,7 +654,14 @@ private function cleanupForCoverage(): RawCodeCoverageData
             $buffer = @file_get_contents($files['coverage']);
 
             if ($buffer !== false) {
-                $coverage = @unserialize($buffer, ['allowed_classes' => false]);
+                $coverage = @unserialize(
+                    $buffer,
+                    [
+                        'allowed_classes' => [
+                            RawCodeCoverageData::class,
+                        ],
+                    ],
+                );
 
                 if ($coverage === false) {
                     $coverage = RawCodeCoverageData::fromXdebugWithoutPathCoverage([]);

src/Runner/Version.php

@@ -44,7 +44,7 @@ public static function id(): string
         }
 
         if (self::$version === '') {
-            self::$version = (new VersionId('9.6.33', dirname(__DIR__, 2)))->getVersion();
+            self::$version = (new VersionId('9.6.34', dirname(__DIR__, 2)))->getVersion();
 
             assert(!empty(self::$version));
         }