createStub cannot be called statically with PHPUnit 9.6

tests/TestCase.php

@@ -6,6 +6,8 @@
 use MongoDB\BSON\Document;
 use MongoDB\BSON\PackedArray;
 use MongoDB\Codec\Codec;
+use MongoDB\Codec\DecodeIfSupported;
+use MongoDB\Codec\EncodeIfSupported;
 use MongoDB\Driver\ReadConcern;
 use MongoDB\Driver\ReadPreference;
 use MongoDB\Driver\WriteConcern;
@@ -234,7 +236,34 @@ protected static function getInvalidObjectValues(bool $includeNull = false): arr
 
  protected static function getInvalidDocumentCodecValues(): array
  {
- return [123, 3.14, 'foo', true, [], new stdClass(), self::createStub(Codec::class)];
+ $codec = new class implements Codec {
+ use DecodeIfSupported;
+ use EncodeIfSupported;
+
+ public function canDecode(mixed $value): bool
+ {
+ return true;
+ }
+
+ public function decode(mixed $value): mixed
+ {
+ return $value;
+ }
+
+ public function canEncode(mixed $value): bool
+ {
+ return true;
+ }
+
+ public function encode(mixed $value): mixed
+ {
+ return $value;
+ }
+ };
+ // @fixme: createStub can be called statically in PHPUnit 10
+ // $codec = self::createStub(Codec::class);
+
+ return [123, 3.14, 'foo', true, [], new stdClass(), $codec];
  }
 
  /**