diff --git a/lib/php/phpunit.xml b/lib/php/phpunit.xml
index 53b3f35..2cbea95 100644
--- a/lib/php/phpunit.xml
+++ b/lib/php/phpunit.xml
@@ -28,12 +28,11 @@
          stopOnFailure="true"
          processIsolation="true"
          xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
-    <coverage includeUncoveredFiles="true">
-        <include>
-            <directory suffix=".php">./src</directory>
+    <filter>
+        <whitelist processUncoveredFilesFromWhitelist="true">
             <directory suffix=".php">./lib</directory>
-        </include>
-    </coverage>
+        </whitelist>
+    </filter>
     <testsuites>
         <testsuite name="Thrift PHP Test Suite">
             <directory>./test/Unit</directory>