diff --git a/phpunit.xml b/phpunit.xml
index 7121048..891b6c8 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,25 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit bootstrap="vendor/autoload.php"
-         backupGlobals="false"
-         backupStaticAttributes="false"
-         colors="true"
-         verbose="true"
-         convertErrorsToExceptions="true"
-         convertNoticesToExceptions="true"
-         convertWarningsToExceptions="true"
-         processIsolation="false"
-         stopOnFailure="false">
-    <testsuites>
-        <testsuite name="Packager">
-            <directory suffix=".php">./tests/</directory>
-        </testsuite>
-    </testsuites>
-    <filter>
-        <whitelist>
-            <directory>src/</directory>
-        </whitelist>
-    </filter>
-    <logging>
-        <log type="coverage-html" target="./report" lowUpperBound="50" highLowerBound="80" />
-    </logging>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" bootstrap="vendor/autoload.php" backupGlobals="false" backupStaticAttributes="false" colors="true" verbose="true" convertErrorsToExceptions="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true" processIsolation="false" stopOnFailure="false" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage>
+    <include>
+      <directory>src/</directory>
+    </include>
+    <report>
+      <html outputDirectory="./report" lowUpperBound="50" highLowerBound="80"/>
+    </report>
+  </coverage>
+  <testsuites>
+    <testsuite name="Packager">
+      <directory suffix=".php">./tests/</directory>
+    </testsuite>
+  </testsuites>
+  <logging/>
 </phpunit>
