diff --git a/phpunit.xml b/phpunit.xml
index 4e410e2..8ddc54c 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,38 +1,36 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-        xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/8.5/phpunit.xsd"
-        bootstrap="tests/bootstrap.php"
-        colors="true"
-        convertErrorsToExceptions="false"
-        convertWarningsToExceptions="false"
-        defaultTestSuite="unit-tests"
-        verbose="false">
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
+         bootstrap="tests/bootstrap.php"
+         colors="true"
+         convertErrorsToExceptions="false"
+         convertWarningsToExceptions="false"
+         defaultTestSuite="unit-tests"
+         verbose="false">
 
-    <php>
-        <ini name="error_reporting" value="-1" />
-    </php>
+  <php>
+    <ini name="error_reporting" value="-1"/>
+  </php>
 
-    <testsuites>
+  <testsuites>
+    <testsuite name="unit-tests">
+      <directory>tests/</directory>
+    </testsuite>
+  </testsuites>
 
-        <testsuite name="unit-tests">
-            <directory>tests/</directory>
-        </testsuite>
+  <groups>
+    <exclude>
+      <group>perf-tests</group>
+    </exclude>
+  </groups>
 
-    </testsuites>
-
-    <groups>
-        <exclude>
-            <group>perf-tests</group>
-        </exclude>
-    </groups>
-
-    <filter>
-        <whitelist>
-            <directory suffix=".php">src/</directory>
-            <exclude>
-                <directory>src/Spout/Autoloader</directory>
-            </exclude>
-        </whitelist>
-    </filter>
+  <coverage>
+    <include>
+      <directory suffix=".php">src/</directory>
+    </include>
+    <exclude>
+      <directory>src/Spout/Autoloader</directory>
+    </exclude>
+  </coverage>
 
 </phpunit>