Explicitly mark parameter as nullable

Author: agibson-godaddy

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.1.1](https://github.com/10up/wp_mock/compare/1.1.0...1.1.1) - 2025-12-03
+### Fixed
+- Address PHP deprecation warnings about implicitly nullable parameters
+
 ## [1.1.0](https://github.com/10up/wp_mock/compare/1.0.1...1.1.0) - 2025-03-11
 ### Added
 - Add support for types in `expectFilter()` mocks

php/WP_Mock/Tools/TestCase.php

@@ -110,7 +110,7 @@ public function tearDown(): void
      * @return TestResult
      * @throws Exception
      */
-    public function run(TestResult $result = null): TestResult
+    public function run(?TestResult $result = null): TestResult
     {
         if ($result === null) {
             $result = $this->createResult();