diff --git a/phpunit.xml b/phpunit.xml
index f8304009..e03eab25 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,27 +1,18 @@
-<phpunit
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/7.1/phpunit.xsd"
-    backupGlobals="false"
-    backupStaticAttributes="false"
-    beStrictAboutTestsThatDoNotTestAnything="true"
-    beStrictAboutChangesToGlobalState="true"
-    beStrictAboutOutputDuringTests="true"
-    colors="true"
-    convertErrorsToExceptions="true"
-    convertNoticesToExceptions="true"
-    convertWarningsToExceptions="true"
-    processIsolation="false"
-    stopOnFailure="false"
-    bootstrap="tests/bootstrap.php"
->
+<?xml version="1.0"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
+        beStrictAboutChangesToGlobalState="true"
+        beStrictAboutOutputDuringTests="true"
+        colors="true"
+        bootstrap="tests/bootstrap.php">
+    <coverage processUncoveredFiles="true">
+        <include>
+            <directory suffix=".php">./src/</directory>
+        </include>
+    </coverage>
     <testsuites>
         <testsuite name="Test Suite">
             <directory>./tests/</directory>
         </testsuite>
     </testsuites>
-    <filter>
-        <whitelist processUncoveredFilesFromWhitelist="true">
-            <directory suffix=".php">./src/</directory>
-        </whitelist>
-    </filter>
 </phpunit>