diff --git a/src/BrainMonkey/TestCase.php b/src/BrainMonkey/TestCase.php
index b1a2f9e..983e851 100644
--- a/src/BrainMonkey/TestCase.php
+++ b/src/BrainMonkey/TestCase.php
@@ -198,7 +198,7 @@ public static function makeDoubleForUnavailableClass( $class_name ) {
 	 *
 	 * @see TestCase::makeDoubleForUnavailableClass()
 	 *
-	 * @param string[] $class_names List of class names to be "faked".
+	 * @param array<string> $class_names List of class names to be "faked".
 	 *
 	 * @return void
 	 */
diff --git a/src/BrainMonkey/bootstrap.php b/src/BrainMonkey/bootstrap.php
index 96c41f2..56d3063 100644
--- a/src/BrainMonkey/bootstrap.php
+++ b/src/BrainMonkey/bootstrap.php
@@ -39,7 +39,7 @@
  *
  * @see TestCase::makeDoubleForUnavailableClass()
  *
- * @param string[] $class_names List of class names to be "faked".
+ * @param array<string> $class_names List of class names to be "faked".
  *
  * @return void
  */