diff --git a/tests/src/Util/HTTPSignatureTest.php b/tests/src/Util/HTTPSignatureTest.php
new file mode 100644
index 0000000000..ba2f6ebbf2
--- /dev/null
+++ b/tests/src/Util/HTTPSignatureTest.php
@@ -0,0 +1,55 @@
+<?php
+/**
+ * @copyright Copyright (C) 2020, Friendica
+ *
+ * @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\src\Util;
+
+use Friendica\Util\HTTPSignature;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * HTTP Signature utility test class
+ */
+class HTTPSignatureTest extends TestCase
+{
+	public function testParseSigheader()
+	{
+		$header = 'keyId="test-key-a", algorithm="hs2019",
+       created=1402170695,
+       headers="(request-target) (created) host date content-type digest
+           content-length",
+       signature="KXUj1H3ZOhv3Nk4xlRLTn4bOMlMOmFiud3VXrMa9MaLCxnVmrqOX5B
+           ulRvB65YW/wQp0oT/nNQpXgOYeY8ovmHlpkRyz5buNDqoOpRsCpLGxsIJ9cX8
+           XVsM9jy+Q1+RIlD9wfWoPHhqhoXt35ZkasuIDPF/AETuObs9QydlsqONwbK+T
+           dQguDK/8Va1Pocl6wK1uLwqcXlxhPEb55EmdYB9pddDyHTADING7K4qMwof2m
+           C3t8Pb0yoLZoZX5a4Or4FrCCKK/9BHAhq/RsVk0dTENMbTB4i7cHvKQu+o9xu
+           YWuxyvBa0Z6NdOb0di70cdrSDEsL5Gz7LBY5J2N9KdGg=="';
+
+		$headers = HTTPSignature::parseSigheader($header);
+		$this->assertSame([
+			'keyId'     => 'test-key-a',
+			'algorithm' => 'hs2019',
+			'created'   => '1402170695',
+			'expires'   => null,
+			'headers'   => ['(request-target)', '(created)', 'host', 'date', 'content-type', 'digest', 'content-length'],
+			'signature' => base64_decode('KXUj1H3ZOhv3Nk4xlRLTn4bOMlMOmFiud3VXrMa9MaLCxnVmrqOX5BulRvB65YW/wQp0oT/nNQpXgOYeY8ovmHlpkRyz5buNDqoOpRsCpLGxsIJ9cX8XVsM9jy+Q1+RIlD9wfWoPHhqhoXt35ZkasuIDPF/AETuObs9QydlsqONwbK+TdQguDK/8Va1Pocl6wK1uLwqcXlxhPEb55EmdYB9pddDyHTADING7K4qMwof2mC3t8Pb0yoLZoZX5a4Or4FrCCKK/9BHAhq/RsVk0dTENMbTB4i7cHvKQu+o9xuYWuxyvBa0Z6NdOb0di70cdrSDEsL5Gz7LBY5J2N9KdGg=='),
+		], $headers);
+	}
+}