diff --git a/dev/tests/api-functional/framework/Magento/TestFramework/TestCase/GraphQl/Client.php b/dev/tests/api-functional/framework/Magento/TestFramework/TestCase/GraphQl/Client.php
index 5af6413840c27..2fe93c02e7adb 100644
--- a/dev/tests/api-functional/framework/Magento/TestFramework/TestCase/GraphQl/Client.php
+++ b/dev/tests/api-functional/framework/Magento/TestFramework/TestCase/GraphQl/Client.php
@@ -213,7 +213,7 @@ private function processResponseHeaders(string $headers): array
 
         $headerLines = preg_split('/((\r?\n)|(\r\n?))/', $headers);
         foreach ($headerLines as $headerLine) {
-            $headerParts = preg_split('/:/', $headerLine);
+            $headerParts = preg_split('/: /', $headerLine, 2);
             if (count($headerParts) == 2) {
                 $headersArray[trim($headerParts[0])] = trim($headerParts[1]);
             } elseif (preg_match('/HTTP\/[\.0-9]+/', $headerLine)) {
diff --git a/dev/tests/api-functional/testsuite/Magento/GraphQl/CorsHeadersTest.php b/dev/tests/api-functional/testsuite/Magento/GraphQl/CorsHeadersTest.php
index 25c808a549e80..b8f59b34fae0c 100644
--- a/dev/tests/api-functional/testsuite/Magento/GraphQl/CorsHeadersTest.php
+++ b/dev/tests/api-functional/testsuite/Magento/GraphQl/CorsHeadersTest.php
@@ -76,7 +76,7 @@ public function testCorsHeadersWhenCorsIsEnabled(): void
         $this->resourceConfig->saveConfig(Configuration::XML_PATH_CORS_ALLOWED_HEADERS, 'Origin');
         $this->resourceConfig->saveConfig(Configuration::XML_PATH_CORS_ALLOW_CREDENTIALS, '1');
         $this->resourceConfig->saveConfig(Configuration::XML_PATH_CORS_ALLOWED_METHODS, 'GET,POST');
-        $this->resourceConfig->saveConfig(Configuration::XML_PATH_CORS_ALLOWED_ORIGINS, 'magento.local');
+        $this->resourceConfig->saveConfig(Configuration::XML_PATH_CORS_ALLOWED_ORIGINS, 'http://magento.local');
         $this->resourceConfig->saveConfig(Configuration::XML_PATH_CORS_MAX_AGE, '86400');
         $this->reinitConfig->reinit();
 
@@ -85,7 +85,7 @@ public function testCorsHeadersWhenCorsIsEnabled(): void
         self::assertEquals('Origin', $headers['Access-Control-Allow-Headers']);
         self::assertEquals('1', $headers['Access-Control-Allow-Credentials']);
         self::assertEquals('GET,POST', $headers['Access-Control-Allow-Methods']);
-        self::assertEquals('magento.local', $headers['Access-Control-Allow-Origin']);
+        self::assertEquals('http://magento.local', $headers['Access-Control-Allow-Origin']);
         self::assertEquals('86400', $headers['Access-Control-Max-Age']);
     }