diff --git a/src/Util/ConfigurationGenerator.php b/src/Util/ConfigurationGenerator.php
index fcf9891bd1e..f312922487e 100644
--- a/src/Util/ConfigurationGenerator.php
+++ b/src/Util/ConfigurationGenerator.php
@@ -32,7 +32,7 @@ final class ConfigurationGenerator
          verbose="true">
     <testsuites>
         <testsuite name="default">
-            <directory suffix="Test.php">{tests_directory}</directory>
+            <directory>{tests_directory}</directory>
         </testsuite>
     </testsuites>
 
diff --git a/tests/unit/Util/ConfigurationGeneratorTest.php b/tests/unit/Util/ConfigurationGeneratorTest.php
index 81fe31715c7..2bea62a0c1b 100644
--- a/tests/unit/Util/ConfigurationGeneratorTest.php
+++ b/tests/unit/Util/ConfigurationGeneratorTest.php
@@ -34,7 +34,7 @@ public function testGeneratesConfigurationCorrectly(): void
          verbose="true">
     <testsuites>
         <testsuite name="default">
-            <directory suffix="Test.php">tests</directory>
+            <directory>tests</directory>
         </testsuite>
     </testsuites>