diff --git a/apps/assets/models/domain.py b/apps/assets/models/domain.py
index af3fe612f..b89c3b128 100644
--- a/apps/assets/models/domain.py
+++ b/apps/assets/models/domain.py
@@ -63,9 +63,8 @@ class Gateway(AssetUser):
     def test_connective(self, local_port=None):
         if local_port is None:
             local_port = self.port
-        if self.password is not None:
-            if not re.match(r'\w+$', self.password):
-                return False, _("Password should not contain special characters")
+        if self.password and not re.match(r'\w+$', self.password):
+            return False, _("Password should not contain special characters")
 
         client = paramiko.SSHClient()
         client.set_missing_host_key_policy(paramiko.AutoAddPolicy())