diff --git a/.github/workflows/code_checks.yaml b/.github/workflows/code_checks.yaml
index b37e54d..827fa38 100644
--- a/.github/workflows/code_checks.yaml
+++ b/.github/workflows/code_checks.yaml
@@ -34,4 +34,4 @@ jobs:
         run: composer update --${{ matrix.stability }} --prefer-dist --no-interaction
 
       - name: Execute tests
-        run: vendor/bin/phpunit --verbose
+        run: vendor/bin/phpunit
diff --git a/.gitignore b/.gitignore
index 546b65c..1f47029 100755
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@
 /var/
 !/var/.gitkeep
 .phpunit.result.cache
+.phpunit.cache
 
 composer.lock
 clover.xml
\ No newline at end of file
diff --git a/Tests/DependencyInjection/RollbarExtensionTest.php b/Tests/DependencyInjection/RollbarExtensionTest.php
index abe9293..64f8d46 100755
--- a/Tests/DependencyInjection/RollbarExtensionTest.php
+++ b/Tests/DependencyInjection/RollbarExtensionTest.php
@@ -37,7 +37,7 @@ public function testConfigVars(string $var, array $expected, array $loadParamete
     /**
      * Data provider generatorConfigVars.
      */
-    public function generatorConfigVars(): array
+    public static function generatorConfigVars(): array
     {
         return [
             ['rollbar.config', ['enabled' => true]],
diff --git a/Tests/Fixtures/App/config/config.yml b/Tests/Fixtures/App/config/config.yml
index 4fbf716..bbaeb5d 100755
--- a/Tests/Fixtures/App/config/config.yml
+++ b/Tests/Fixtures/App/config/config.yml
@@ -5,7 +5,7 @@ parameters:
 
 framework:
     test: true
-    secret:          "%secret%"
+    secret: "%secret%"
     router:
         resource: "%kernel.project_dir%/config/routing.yml"
         strict_requirements: ~
diff --git a/Tests/Fixtures/ErrorHandler.php b/Tests/Fixtures/ErrorHandler.php
deleted file mode 100755
index c8e4ef3..0000000
--- a/Tests/Fixtures/ErrorHandler.php
+++ /dev/null
@@ -1,42 +0,0 @@
-<?php
-
-namespace Tests\Fixtures;
-
-use Monolog\Handler\AbstractProcessingHandler;
-use Monolog\Logger;
-
-class ErrorHandler extends AbstractProcessingHandler
-{
-    protected static ErrorHandler $instance;
-
-    /**
-     * @var callable
-     */
-    protected $assert;
-
-    public static function getInstance(): ErrorHandler
-    {
-        if (empty(static::$instance)) {
-            static::$instance = new self(Logger::DEBUG);
-        }
-
-        return static::$instance;
-    }
-
-    public function setAssert(callable $assert = null): void
-    {
-        $this->assert = $assert;
-    }
-
-    /**
-     * Writes the record down to the log of the implementing handler
-     */
-    protected function write(array $record): void
-    {
-        $dummy = static function () {
-        };
-
-        $closure = empty($this->assert) ? $dummy : $this->assert;
-        $closure($record);
-    }
-}
diff --git a/Tests/Payload/ErrorItemTest.php b/Tests/Payload/ErrorItemTest.php
index ba85910..14d4c38 100755
--- a/Tests/Payload/ErrorItemTest.php
+++ b/Tests/Payload/ErrorItemTest.php
@@ -36,7 +36,7 @@ public function testInvoke(int $code, string $message, string $file, int $line,
      *
      * @throws \Exception
      */
-    public function generateInvoke(): array
+    public static function generateInvoke(): array
     {
         return [
             [E_ERROR, 'Error message - ' . microtime(true), __FILE__, random_int(1, 100), 'E_ERROR'],
diff --git a/composer.json b/composer.json
index 024e9d7..9055b44 100755
--- a/composer.json
+++ b/composer.json
@@ -21,25 +21,24 @@
     },
     "autoload-dev": {
         "files": [
-            "Tests/Fixtures/App/AppKernel.php",
-            "Tests/Fixtures/ErrorHandler.php"
+            "Tests/Fixtures/App/AppKernel.php"
             ],
         "psr-4": { "Tests\\": "Tests/"}
     },
     "require": {
         "php": ">=8.0.2",
-        "rollbar/rollbar": "^3.1",
-        "symfony/dependency-injection": "^5.4|^6.0",
-        "symfony/config": "^5.4|^6.0",
-        "symfony/http-kernel": "^5.4|^6.0",
-        "symfony/monolog-bundle": "^3.0",
-        "symfony/serializer": "^5.4|^6.0",
+        "rollbar/rollbar": "^3.1|^4.0",
+        "symfony/dependency-injection": "^5.4|^6.2",
+        "symfony/config": "^5.4|^6.2",
+        "symfony/http-kernel": "^5.4|^6.2",
+        "symfony/monolog-bundle": "^3.8",
+        "symfony/serializer": "^5.4|^6.2",
         "ext-json": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.5",
-        "symfony/framework-bundle": "^5.4|^6.0",
-        "squizlabs/php_codesniffer": "^3.6",
+        "phpunit/phpunit": "^9.6|^10.1",
+        "symfony/framework-bundle": "^5.4|^6.2",
+        "squizlabs/php_codesniffer": "^3.7",
         "matthiasnoback/symfony-dependency-injection-test": "^4.3"
     },
     "scripts": {
diff --git a/phpunit.xml b/phpunit.xml
index 9fb371f..b1d3551 100755
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!-- https://phpunit.de/manual/current/en/appendixes.configuration.html -->
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd" backupGlobals="false" colors="true" convertErrorsToExceptions="false" bootstrap="vendor/autoload.php">
-  <coverage>
-    <include>
-      <directory>./</directory>
-    </include>
-  </coverage>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
+         colors="true"
+         bootstrap="vendor/autoload.php"
+         cacheDirectory=".phpunit.cache">
+  <coverage/>
   <php>
     <ini name="error_reporting" value="-1"/>
     <server name="APP_ENV" value="test" force="true"/>
@@ -20,4 +20,9 @@
       <directory>Tests/</directory>
     </testsuite>
   </testsuites>
+  <source>
+    <include>
+      <directory>./</directory>
+    </include>
+  </source>
 </phpunit>