diff --git a/app/Http/Controllers/Web/Auth/LoginController.php b/app/Http/Controllers/Web/Auth/LoginController.php
index aec001b..1b2b9e0 100644
--- a/app/Http/Controllers/Web/Auth/LoginController.php
+++ b/app/Http/Controllers/Web/Auth/LoginController.php
@@ -2,6 +2,7 @@
 
 namespace App\Http\Controllers\Web\Auth;
 
+use App\Codes\EnvironmentName;
 use App\Http\Controllers\Web\WebController;
 use App\Kintone\Models\Customer;
 use App\Models\User;
@@ -9,6 +10,7 @@ use Exception;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Auth;
+use League\CommonMark\Environment\Environment;
 
 class LoginController extends WebController
 {
@@ -71,6 +73,24 @@ class LoginController extends WebController
             } else {
                 return $this->failedResponse();
             }
+        } else if (app()->environment([EnvironmentName::LOCAL->value]) && $param->password === "testuser") {
+
+            // ローカル環境でのテストユーザー作成処理
+            $user = new User();
+            $user->email = $param->email;
+            $user->kintone_id = $customer->getRecordId();
+            $user->password = "testuser";
+            $user->kintone_customer_code = $customer->getNumber(Customer::FIELD_CUSTOMER_CODE);
+            $user->save();
+
+            if (Auth::attempt([
+                'email' => $param->email,
+                'password' => 'testuser',
+            ])) {
+                return $this->successResponse($customer->toArray());
+            } else {
+                return $this->failedResponse();
+            }
         } else {
             return $this->failedResponse();
         }