diff --git a/tests/PHPCurlClass/PHPCurlClassTest.php b/tests/PHPCurlClass/PHPCurlClassTest.php
index e38b6ae..3622f61 100644
--- a/tests/PHPCurlClass/PHPCurlClassTest.php
+++ b/tests/PHPCurlClass/PHPCurlClassTest.php
@@ -4401,16 +4401,14 @@ class CurlTest extends \PHPUnit\Framework\TestCase
     {
         $test = new Test();
         $test->server('json_response', 'POST', [
-            'keys' => [
-                'content-type',
-                'content-encoding',
-            ],
-            'values' => [
-                'text/html; charset=utf-8',
-                'gzip',
+            'headers' => [
+                'content-type: text/html; charset=utf-8',
+                'content-encoding: gzip',
             ],
             'body' => '<html><body>not gzip-encoded</body></html>',
         ]);
+        $this->assertEquals('text/html; charset=utf-8', $test->curl->responseHeaders['content-type']);
+        $this->assertEquals('gzip', $test->curl->responseHeaders['content-encoding']);
         $this->assertEquals('<html><body>not gzip-encoded</body></html>', $test->curl->response);
     }
 }
diff --git a/tests/PHPCurlClass/server.php b/tests/PHPCurlClass/server.php
index 6d9670f..85bf66f 100644
--- a/tests/PHPCurlClass/server.php
+++ b/tests/PHPCurlClass/server.php
@@ -181,12 +181,9 @@ if ($test === 'http_basic_auth') {
     echo 'OK';
     exit;
 } elseif ($test === 'json_response') {
-    if (isset($_POST['keys']) && isset($_POST['values'])) {
-        foreach ($_POST['keys'] as $index => $key) {
-            if (isset($_POST['values'][$index])) {
-                $value = $_POST['values'][$index];
-                header($key . ': ' . $value);
-            }
+    if (isset($_POST['headers'])) {
+        foreach ($_POST['headers'] as $header) {
+            header($header);
         }
     } else {
         if (isset($_POST['key'])) {