diff --git a/src/Module/BaseApi.php b/src/Module/BaseApi.php
index 25caa78ab..7e4693186 100644
--- a/src/Module/BaseApi.php
+++ b/src/Module/BaseApi.php
@@ -29,6 +29,7 @@ use Friendica\Model\Post;
 use Friendica\Network\HTTPException;
 use Friendica\Security\BasicAuth;
 use Friendica\Security\OAuth;
+use Friendica\Util\Arrays;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\HTTPInputData;
 use Friendica\Util\XML;
@@ -384,34 +385,6 @@ class BaseApi extends BaseModule
 		return $return;
 	}
 
-	/**
-	 * walks recursively through an array with the possibility to change value and key
-	 *
-	 * @param array    $array    The array to walk through
-	 * @param callable $callback The callback function
-	 *
-	 * @return array the transformed array
-	 */
-	static public function walkRecursive(array &$array, callable $callback)
-	{
-		$new_array = [];
-
-		foreach ($array as $k => $v) {
-			if (is_array($v)) {
-				if ($callback($v, $k)) {
-					$new_array[$k] = self::walkRecursive($v, $callback);
-				}
-			} else {
-				if ($callback($v, $k)) {
-					$new_array[$k] = $v;
-				}
-			}
-		}
-		$array = $new_array;
-
-		return $array;
-	}
-
 	/**
 	 * Formats the data according to the data type
 	 *
@@ -484,7 +457,7 @@ class BaseApi extends BaseModule
 
 		if (is_array($data2)) {
 			$key = key($data2);
-			self::walkRecursive($data2, ['Friendica\Module\BaseApi', 'reformatXML']);
+			Arrays::walkRecursive($data2, ['Friendica\Module\BaseApi', 'reformatXML']);
 
 			if ($key == '0') {
 				$data4 = [];
diff --git a/src/Util/Arrays.php b/src/Util/Arrays.php
index bd91d8e21..d99eb4692 100644
--- a/src/Util/Arrays.php
+++ b/src/Util/Arrays.php
@@ -29,7 +29,7 @@ class Arrays
 	/**
 	 * Private constructor
 	 */
-	private function __construct () {
+	private function __construct() {
 		// Utitlities don't have instances
 	}
 
@@ -40,7 +40,7 @@ class Arrays
 	 * @param string $glue  Glue for imploded elements
 	 * @return string String with elements from array
 	 */
-	public static function recursiveImplode (array $array, $glue) {
+	public static function recursiveImplode(array $array, $glue) {
 		// Init returned string
 		$string = '';
 
@@ -62,4 +62,32 @@ class Arrays
 		// Return it
 		return $string;
 	}
+
+	/**
+	 * walks recursively through an array with the possibility to change value and key
+	 *
+	 * @param array    $array    The array to walk through
+	 * @param callable $callback The callback function
+	 *
+	 * @return array the transformed array
+	 */
+	static public function walkRecursive(array &$array, callable $callback)
+	{
+		$new_array = [];
+
+		foreach ($array as $k => $v) {
+			if (is_array($v)) {
+				if ($callback($v, $k)) {
+					$new_array[$k] = self::walkRecursive($v, $callback);
+				}
+			} else {
+				if ($callback($v, $k)) {
+					$new_array[$k] = $v;
+				}
+			}
+		}
+		$array = $new_array;
+
+		return $array;
+	}
 }
diff --git a/tests/legacy/ApiTest.php b/tests/legacy/ApiTest.php
index eaafda9b7..a83c7f0e7 100644
--- a/tests/legacy/ApiTest.php
+++ b/tests/legacy/ApiTest.php
@@ -14,6 +14,7 @@ use Friendica\Module\BaseApi;
 use Friendica\Network\HTTPException;
 use Friendica\Security\BasicAuth;
 use Friendica\Test\FixtureTest;
+use Friendica\Util\Arrays;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Temporal;
 use Monolog\Handler\TestHandler;
@@ -998,7 +999,7 @@ class ApiTest extends FixtureTest
 	}
 
 	/**
-	 * Test the BaseApi::walkRecursive() function.
+	 * Test the Arrays::walkRecursive() function.
 	 *
 	 * @return void
 	 */
@@ -1007,7 +1008,7 @@ class ApiTest extends FixtureTest
 		$array = ['item1'];
 		self::assertEquals(
 			$array,
-			BaseApi::walkRecursive(
+			Arrays::walkRecursive(
 				$array,
 				function () {
 					// Should we test this with a callback that actually does something?
@@ -1018,7 +1019,7 @@ class ApiTest extends FixtureTest
 	}
 
 	/**
-	 * Test the BaseApi::walkRecursive() function with an array.
+	 * Test the Arrays::walkRecursive() function with an array.
 	 *
 	 * @return void
 	 */
@@ -1027,7 +1028,7 @@ class ApiTest extends FixtureTest
 		$array = [['item1'], ['item2']];
 		self::assertEquals(
 			$array,
-			BaseApi::walkRecursive(
+			Arrays::walkRecursive(
 				$array,
 				function () {
 					// Should we test this with a callback that actually does something?
@@ -2549,8 +2550,8 @@ class ApiTest extends FixtureTest
 	public function testApiHelpTest()
 	{
 		// @todo How to test the new API?
-		// $result = api_help_test('json');
-		// self::assertEquals(['ok' => 'ok'], $result);
+		$result = \Friendica\Module\Api\Friendica\Help\Test::rawcontent(['extension' => 'xml']);
+		self::assertEquals(['ok' => 'ok'], $result);
 	}
 
 	/**