Merge branch '9.6' into 10.5

* 9.6:
  Fix regression introduced in PHPUnit 9.6.33

Author: sebastianbergmann

src/Runner/PhptTestCase.php

@@ -659,7 +659,14 @@ private function cleanupForCoverage(): RawCodeCoverageData
         }
 
         if ($buffer !== false) {
-            $coverage = @unserialize($buffer, ['allowed_classes' => false]);
+            $coverage = @unserialize(
+                $buffer,
+                [
+                    'allowed_classes' => [
+                        RawCodeCoverageData::class,
+                    ],
+                ],
+            );
 
             if ($coverage === false) {
                 $coverage = RawCodeCoverageData::fromXdebugWithoutPathCoverage([]);