diff --git a/composer.json b/composer.json
index d0a338ae..10da6105 100644
--- a/composer.json
+++ b/composer.json
@@ -46,11 +46,12 @@
         "ext-sysvsem": "*",
         "eloquent/liberator": "^2.0",
         "ergebnis/composer-normalize": "^2.13",
+        "ergebnis/phpunit-slow-test-detector": "^2.9",
         "friendsofphp/php-cs-fixer": "^3.0",
         "mikey179/vfsstream": "^1.6.7",
         "php-mock/php-mock-phpunit": "^2.1",
         "phpstan/phpstan": "^0.12.58",
-        "phpunit/phpunit": "^9.4",
+        "phpunit/phpunit": "^9.5.25 || ^10.0 || ^11.0",
         "predis/predis": "^1.1",
         "spatie/async": "^1.5"
     },
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 96cd01b1..6f14faf0 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,18 +1,21 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.4/phpunit.xsd"
-         backupGlobals="false"
-         backupStaticAttributes="false"
-         bootstrap="vendor/autoload.php"
-         colors="true"
-         convertErrorsToExceptions="true"
-         convertNoticesToExceptions="true"
-         convertWarningsToExceptions="true"
-         processIsolation="false"
-         stopOnFailure="false">
+<phpunit bootstrap="vendor/autoload.php" colors="true">
     <testsuites>
-        <testsuite name="Unit">
-            <directory suffix="Test.php">./tests</directory>
+        <testsuite name="tests">
+            <directory>tests</directory>
         </testsuite>
     </testsuites>
+    <extensions>
+        <bootstrap class="Ergebnis\PHPUnit\SlowTestDetector\Extension" />
+    </extensions>
+    <source>
+        <include>
+            <directory>src</directory>
+            <directory>tests</directory>
+        </include>
+    </source>
+    <coverage>
+        <report>
+            <php outputFile="coverage/phpunit.cov" />
+        </report>
+    </coverage>
 </phpunit>