diff --git a/.github/workflows/formats.yml b/.github/workflows/formats.yml
index b34b6ca..0c20d66 100644
--- a/.github/workflows/formats.yml
+++ b/.github/workflows/formats.yml
@@ -30,8 +30,5 @@ jobs:
             - name: Coding Style Checks
               run: composer test:lint
 
-            - name: Refactor Checks
-              run: composer test:refactor
-
             - name: Type Checks
               run: composer test:types
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 1b60bdc..da2a368 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -9,7 +9,7 @@ jobs:
             fail-fast: true
             matrix:
                 os: [ubuntu-latest]
-                php: [8.1, 8.2]
+                php: [8.1, 8.2, 8.3, 8.4]
                 stability: [prefer-lowest, prefer-stable]
 
         name: Tests php@${{ matrix.php }} - ${{ matrix.os }} - ${{ matrix.stability }}
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 2c267fa..115fbde 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -49,12 +49,6 @@ Run all tests:
 composer test
 ```
 
-Check code quality:
-
-```bash
-composer test:refactor
-```
-
 Check types:
 
 ```bash
@@ -82,4 +76,4 @@ If you want to check things work against a specific version of PHP, you may incl
 docker compose build --build-arg PHP=8.2
 ```
 
-The default PHP version will always be the lowest version of PHP supported by jira-php.
\ No newline at end of file
+The default PHP version will always be the lowest version of PHP supported by jira-php.
diff --git a/composer.json b/composer.json
index 0044f3a..bad666a 100644
--- a/composer.json
+++ b/composer.json
@@ -22,13 +22,12 @@
     },
     "require-dev": {
         "laravel/pint": "^1.2.0",
+        "mockery/mockery": "^1.6",
         "nunomaduro/collision": "^7.0.0",
         "pestphp/pest": "^2.0.0",
-        "pestphp/pest-plugin-mock": "^2.0.0",
         "phpstan/extension-installer": "^1.2",
         "phpstan/phpstan": "^1.8.6",
         "phpstan/phpstan-strict-rules": "^1.4",
-        "rector/rector": "^0.15",
         "symfony/var-dumper": "^6.2.0"
     },
     "autoload": {
@@ -56,14 +55,11 @@
     },
     "scripts": {
         "lint": "pint --preset laravel -v --ansi",
-        "refactor": "rector --debug --ansi",
         "test:lint": "pint --preset laravel --test -v --ansi",
-        "test:refactor": "rector --dry-run --ansi",
         "test:types": "phpstan analyse --ansi",
         "test:unit": "pest --colors=always --min=100 --order-by=random --coverage",
         "test": [
             "@test:lint",
-            "@test:refactor",
             "@test:types",
             "@test:unit"
         ]
diff --git a/rector.php b/rector.php
deleted file mode 100644
index 2f41a3e..0000000
--- a/rector.php
+++ /dev/null
@@ -1,35 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-use Rector\CodingStyle\Rector\Encapsed\EncapsedStringsToSprintfRector;
-use Rector\CodingStyle\Rector\Encapsed\WrapEncapsedVariableInCurlyBracesRector;
-use Rector\Config\RectorConfig;
-use Rector\EarlyReturn\Rector\If_\ChangeAndIfToEarlyReturnRector;
-use Rector\Privatization\Rector\Class_\FinalizeClassesWithoutChildrenRector;
-use Rector\Set\ValueObject\LevelSetList;
-use Rector\Set\ValueObject\SetList;
-
-return static function (RectorConfig $rectorConfig): void {
-    $rectorConfig->paths([
-        __DIR__.'/src',
-    ]);
-
-    $rectorConfig->sets([
-        SetList::CODE_QUALITY,
-        SetList::CODING_STYLE,
-        SetList::DEAD_CODE,
-        SetList::NAMING,
-        SetList::PRIVATIZATION,
-        SetList::TYPE_DECLARATION,
-        SetList::EARLY_RETURN,
-        LevelSetList::UP_TO_PHP_81,
-    ]);
-
-    $rectorConfig->skip([
-        EncapsedStringsToSprintfRector::class,
-        WrapEncapsedVariableInCurlyBracesRector::class,
-        FinalizeClassesWithoutChildrenRector::class,
-        ChangeAndIfToEarlyReturnRector::class,
-    ]);
-};
diff --git a/src/Jira.php b/src/Jira.php
index c62db06..0ae961e 100644
--- a/src/Jira.php
+++ b/src/Jira.php
@@ -19,7 +19,7 @@ public static function client(string $username, string $password, string $host):
 
         $headers = Headers::withAuthorization(basicAuthentication: $basicAuthentication);
 
-        $client = new GuzzleClient();
+        $client = new GuzzleClient;
 
         $httpTransporter = new HttpTransporter(client: $client, baseUri: $baseUri, headers: $headers);