diff --git a/tests/phpunit/multisite.xml b/tests/phpunit/multisite.xml
index a326419d97d3c..b2ac638609dd2 100644
--- a/tests/phpunit/multisite.xml
+++ b/tests/phpunit/multisite.xml
@@ -39,4 +39,41 @@
 			</arguments>
 		</listener>
 	</listeners>
+	<filter>
+		<whitelist addUncoveredFilesFromWhitelist="true">
+			<directory suffix=".php">../../build</directory>
+			<exclude>
+				<!-- Third party library exclusions. -->
+				<directory suffix=".php">../../build/wp-includes/ID3</directory>
+				<directory suffix=".php">../../build/wp-includes/IXR</directory>
+				<directory suffix=".php">../../build/wp-includes/random_compat</directory>
+				<directory suffix=".php">../../build/wp-includes/PHPMailer</directory>
+				<directory suffix=".php">../../build/wp-includes/Requests</directory>
+				<directory suffix=".php">../../build/wp-includes/SimplePie</directory>
+				<directory suffix=".php">../../build/wp-includes/sodium_compat</directory>
+				<directory suffix=".php">../../build/wp-includes/Text</directory>
+
+				<!-- Plugins and themes. -->
+				<directory suffix=".php">../../build/wp-content/</directory>
+
+				<file>../../build/wp-admin/includes/class-ftp*</file>
+				<file>../../build/wp-admin/includes/class-pclzip.php</file>
+				<file>../../build/wp-admin/includes/deprecated.php</file>
+				<file>../../build/wp-admin/includes/ms-deprecated.php</file>
+
+				<file>../../build/wp-includes/atomlib.php</file>
+				<file>../../build/wp-includes/class-IXR.php</file>
+				<file>../../build/wp-includes/class-json.php</file>
+				<file>../../build/wp-includes/class-phpass.php</file>
+				<file>../../build/wp-includes/class-pop3.php</file>
+				<file>../../build/wp-includes/class-requests.php</file>
+				<file>../../build/wp-includes/class-simplepie.php</file>
+				<file>../../build/wp-includes/class-snoopy.php</file>
+				<file>../../build/wp-includes/deprecated.php</file>
+				<file>../../build/wp-includes/ms-deprecated.php</file>
+				<file>../../build/wp-includes/pluggable-deprecated.php</file>
+				<file>../../build/wp-includes/rss.php</file>
+			</exclude>
+		</whitelist>
+	</filter>
 </phpunit>