diff --git a/src/Middleware/LocalhostCheckerMiddleware.php b/src/Middleware/LocalhostCheckerMiddleware.php
index 6b28633..418a510 100644
--- a/src/Middleware/LocalhostCheckerMiddleware.php
+++ b/src/Middleware/LocalhostCheckerMiddleware.php
@@ -40,6 +40,6 @@ public function __invoke(
             ));
         }
 
-        return $out($request, $response, $out);
+        return $out($request, $response);
     }
 }
diff --git a/test/Middleware/LocalhostCheckerMiddlewareTest.php b/test/Middleware/LocalhostCheckerMiddlewareTest.php
index 9eb7a63..e28cf89 100644
--- a/test/Middleware/LocalhostCheckerMiddlewareTest.php
+++ b/test/Middleware/LocalhostCheckerMiddlewareTest.php
@@ -45,7 +45,7 @@ public function testDelegatesIfFromDockerLocal(string $ipAddress)
 
         $middleware = new LocalhostCheckerMiddleware();
 
-        $returnedResponse = $middleware->__invoke($request->reveal(), $response, function($request, $response, $out) {
+        $returnedResponse = $middleware->__invoke($request->reveal(), $response, function($request, $response) {
             return $response;
         });
 
@@ -61,7 +61,7 @@ public function testDelegateIfFromIPv4Localhost()
 
         $middleware = new LocalhostCheckerMiddleware();
 
-        $returnedResponse = $middleware->__invoke($request->reveal(), $response, function($request, $response, $out) {
+        $returnedResponse = $middleware->__invoke($request->reveal(), $response, function($request, $response) {
             return $response;
         });
 
@@ -77,7 +77,7 @@ public function testDelegateIfFromIPv6Localhost()
 
         $middleware = new LocalhostCheckerMiddleware();
 
-        $returnedResponse = $middleware->__invoke($request->reveal(), $response, function($request, $response, $out) {
+        $returnedResponse = $middleware->__invoke($request->reveal(), $response, function($request, $response) {
             return $response;
         });