diff --git a/tests/Util/ApiResponseDouble.php b/tests/Util/ApiResponseDouble.php
deleted file mode 100644
index a702c17fd..000000000
--- a/tests/Util/ApiResponseDouble.php
+++ /dev/null
@@ -1,86 +0,0 @@
-<?php
-/**
- * @copyright Copyright (C) 2010-2021, the Friendica project
- *
- * @license GNU AGPL version 3 or any later version
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-
-namespace Friendica\Test\Util;
-
-use Friendica\Module\Api\ApiResponse;
-
-class ApiResponseDouble extends ApiResponse
-{
-	/**
-	 * The header list
-	 *
-	 * @var string[][]
-	 */
-	protected static $header = [];
-
-	/**
-	 * The printed output
-	 *
-	 * @var string
-	 */
-	protected static $output = '';
-
-	/**
-	 * @return string[]
-	 */
-	public static function getHeader(): array
-	{
-		return static::$header;
-	}
-
-	/**
-	 * @return string
-	 */
-	public static function getOutput(): string
-	{
-		return static::$output;
-	}
-
-	public static function reset()
-	{
-		self::$output = '';
-		self::$header = [];
-	}
-
-	/**
-	 * {@inheritDoc}
-	 */
-	public function setHeader(?string $header = null, ?string $key = null): void
-	{
-		if (!isset($header) && !empty($key)) {
-			unset(static::$header[$key]);
-		}
-
-		if (isset($header)) {
-			if (empty($key)) {
-				static::$header[] = $header;
-			} else {
-				static::$header[$key] = $header;
-			}
-		}
-	}
-
-	protected function printOutput(string $output)
-	{
-		static::$output .= $output;
-	}
-}