diff --git a/maigret/checking.py b/maigret/checking.py
index 9f368f74..a196cfc9 100644
--- a/maigret/checking.py
+++ b/maigret/checking.py
@@ -131,6 +131,9 @@ async def check(self, future) -> Tuple[str, int, Optional[CheckError]]:
                 self.logger.debug(e, exc_info=True)
                 error = CheckError("Unexpected", str(e))
 
+        if error == "Invalid proxy response":
+            self.logger.debug(e, exc_info=True)
+
         return str(html_text), status_code, error
 
 
diff --git a/maigret/resources/data.json b/maigret/resources/data.json
index 188fdd4d..5337c914 100644
--- a/maigret/resources/data.json
+++ b/maigret/resources/data.json
@@ -14523,9 +14523,26 @@
             "usernameClaimed": "jenny",
             "usernameUnclaimed": "noonewouldeverusethis7"
         },
+        "Nitter": {
+            "tags": [
+                "messaging"
+            ],
+            "regexCheck": "^[a-zA-Z0-9_]{1,15}$",
+            "checkType": "message",
+            "absenceStrs": [
+                "<title>Error | nitter</title>",
+                "The requested URL was not found on this server."
+            ],
+            "source": "Twitter",
+            "alexaRank": 48,
+            "urlMain": "https://www.nitter.net/",
+            "url": "https://nitter.net/{username}",
+            "usernameClaimed": "blue",
+            "usernameUnclaimed": "noonewould123"
+        },
         "Twitter": {
             "tags": [
-                "us"
+                "messaging"
             ],
             "headers": {
                 "sec-ch-ua": "Google Chrome\";v=\"87\", \" Not;A Brand\";v=\"99\", \"Chromium\";v=\"87\"",
@@ -14536,6 +14553,7 @@
             "errors": {
                 "Bad guest token": "x-guest-token update required"
             },
+            "regexCheck": "^[a-zA-Z0-9_]{1,15}$",
             "activation": {
                 "method": "twitter",
                 "marks": [
@@ -14554,7 +14572,7 @@
             "urlMain": "https://www.twitter.com/",
             "url": "https://twitter.com/{username}",
             "usernameClaimed": "blue",
-            "usernameUnclaimed": "noonewouldeverusethis7"
+            "usernameUnclaimed": "noonewould123"
         },
         "Typeracer": {
             "tags": [