diff --git a/tests/phpunit/tests/http/wpGetHttpHeaders.php b/tests/phpunit/tests/http/wpGetHttpHeaders.php
index 855497674b510..450b582ec6360 100644
--- a/tests/phpunit/tests/http/wpGetHttpHeaders.php
+++ b/tests/phpunit/tests/http/wpGetHttpHeaders.php
@@ -26,8 +26,6 @@ public function test_wp_get_http_headers_valid_url() {
 
 	/**
 	 * Test with an invalid URL
-	 *
-	 * @group external-http
 	 */
 	public function test_wp_get_http_headers_invalid_url() {
 		$result = wp_get_http_headers( 'not_an_url' );
@@ -36,8 +34,6 @@ public function test_wp_get_http_headers_invalid_url() {
 
 	/**
 	 * Test to see if the deprecated argument is working
-	 *
-	 * @group external-http
 	 */
 	public function test_wp_get_http_headers_deprecated_argument() {
 		$this->setExpectedDeprecated( 'wp_get_http_headers' );
@@ -58,6 +54,6 @@ public function mock_http_request( $response, $parsed_args, $url ) {
 			return array( 'headers' => true );
 		}
 
-		return $response;
+		return new WP_Error( 'http_request_failed', 'A valid URL was not provided.' );
 	}
 }