diff --git a/src/Util/HTTPInputData.php b/src/Util/HTTPInputData.php
index 322a462f12..8886b61e4c 100644
--- a/src/Util/HTTPInputData.php
+++ b/src/Util/HTTPInputData.php
@@ -29,7 +29,7 @@ class HTTPInputData
 {
 	public static function process()
 	{
-		$content_parts = explode(';', $_SERVER['CONTENT_TYPE'] ?? 'application/x-www-form-urlencoded');
+		$content_parts = explode(';', static::getContentType());
 
 		$boundary = '';
 		$encoding = '';
@@ -263,6 +263,7 @@ class HTTPInputData
 	/**
 	 * Returns the current PHP input stream
 	 * Mainly used for test doubling
+	 *
 	 * @return false|resource
 	 */
 	protected static function getPhpInputStream()
@@ -273,10 +274,22 @@ class HTTPInputData
 	/**
 	 * Returns the content of the current PHP input
 	 * Mainly used for test doubling
+	 *
 	 * @return false|string
 	 */
 	protected static function getPhpInputContent()
 	{
 		return file_get_contents('php://input');
 	}
+
+	/**
+	 * Returns the content type string of the current call
+	 * Mainly used for test doubling
+	 *
+	 * @return false|string
+	 */
+	protected static function getContentType()
+	{
+		return $_SERVER['CONTENT_TYPE'] ?? 'application/x-www-form-urlencoded';
+	}
 }
diff --git a/tests/Util/HTTPInputDataDouble.php b/tests/Util/HTTPInputDataDouble.php
index c00fa6fad9..6db5c44850 100644
--- a/tests/Util/HTTPInputDataDouble.php
+++ b/tests/Util/HTTPInputDataDouble.php
@@ -33,9 +33,12 @@ class HTTPInputDataDouble extends HTTPInputData
 	protected static $injectedStream = false;
 	/** @var false|string */
 	protected static $injectedContent = false;
+	/** @var false|string */
+	protected static $injectedContentType = false;
 
 	/**
 	 * injects the PHP input stream for a test
+	 *
 	 * @param false|resource $stream
 	 */
 	public static function setPhpInputStream($stream)
@@ -45,6 +48,7 @@ class HTTPInputDataDouble extends HTTPInputData
 
 	/**
 	 * injects the PHP input content for a test
+	 *
 	 * @param false|string $content
 	 */
 	public static function setPhpInputContent($content)
@@ -52,6 +56,16 @@ class HTTPInputDataDouble extends HTTPInputData
 		self::$injectedContent = $content;
 	}
 
+	/**
+	 * injects the PHP input content type for a test
+	 *
+	 * @param false|string $contentType
+	 */
+	public static function setPhpInputContentType($contentType)
+	{
+		self::$injectedContentType = $contentType;
+	}
+
 	/** {@inheritDoc} */
 	protected static function getPhpInputStream()
 	{
@@ -63,4 +77,10 @@ class HTTPInputDataDouble extends HTTPInputData
 	{
 		return static::$injectedContent;
 	}
+
+	/** {@inheritDoc} */
+	protected static function getContentType()
+	{
+		return static::$injectedContentType;
+	}
 }
diff --git a/tests/src/Util/HTTPInputDataTest.php b/tests/src/Util/HTTPInputDataTest.php
index a4e3ce20df..f50755a30f 100644
--- a/tests/src/Util/HTTPInputDataTest.php
+++ b/tests/src/Util/HTTPInputDataTest.php
@@ -27,6 +27,7 @@ use Friendica\Util\HTTPInputData;
 
 /**
  * Testing HTTPInputData
+ *
  * @see	HTTPInputData
  */
 class HTTPInputDataTest extends MockedTest
@@ -35,6 +36,7 @@ class HTTPInputDataTest extends MockedTest
 	 * Returns the data stream for the unit test
 	 * Each array element of the first hierarchy represents one test run
 	 * Each array element of the second hierarchy represents the parameters, passed to the test function
+	 *
 	 * @return array[]
 	 */
 	public function dataStream()
@@ -67,16 +69,17 @@ class HTTPInputDataTest extends MockedTest
 
 	/**
 	 * Tests the HTTPInputData::process() method
-	 * @see HTTPInputData::process()
-	 * @param string $contenttype The content typer of the transmitted data
+	 *
+	 * @param string $contentType The content typer of the transmitted data
 	 * @param string $input       The input, we got from the data stream
 	 * @param array  $expected    The expected output
+	 *
 	 * @dataProvider dataStream
+	 * @see HTTPInputData::process()
 	 */
-	public function testHttpInput(string $contenttype, string $input, array $expected)
+	public function testHttpInput(string $contentType, string $input, array $expected)
 	{
-		$_SERVER['CONTENT_TYPE'] = $contenttype;
-
+		HTTPInputDataDouble::setPhpInputContentType($contentType);
 		HTTPInputDataDouble::setPhpInputContent($input);
 		$stream = fopen('php://memory', 'r+');
 		fwrite($stream, $input);