diff --git a/tests/json/sanitizer_test.php b/tests/json/sanitizer_test.php
new file mode 100644
index 0000000000..7082d88590
--- /dev/null
+++ b/tests/json/sanitizer_test.php
@@ -0,0 +1,35 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+use phpbb\json\sanitizer;
+
+class phpbb_json_sanitizer_test extends phpbb_test_case
+{
+	public function data_decode()
+	{
+		return [
+			[false, []],
+			['', []],
+			['{ "name": "phpbb/phpbb-style-prosilver"}', ['name' => 'phpbb/phpbb-style-prosilver']],
+			['{ "name":[[ "phpbb/phpbb-style-prosilver"}', []],
+		];
+	}
+
+	/**
+	 * @dataProvider data_decode
+	 */
+	public function test_decode_data($input, $output)
+	{
+		$this->assertEquals($output, sanitizer::decode($input));
+	}
+}