diff --git a/nonebot/adapters/cqhttp.py b/nonebot/adapters/cqhttp.py
index ecb15daa..33aee948 100644
--- a/nonebot/adapters/cqhttp.py
+++ b/nonebot/adapters/cqhttp.py
@@ -182,13 +182,13 @@ def _check_nickname(bot: "Bot", event: "Event"):
 
     first_text = first_msg_seg.data["text"]
 
-    if bot.config.NICKNAME:
+    if bot.config.nickname:
         # check if the user is calling me with my nickname
-        if isinstance(bot.config.NICKNAME, str) or \
-                not isinstance(bot.config.NICKNAME, Iterable):
-            nicknames = (bot.config.NICKNAME,)
+        if isinstance(bot.config.nickname, str) or \
+                not isinstance(bot.config.nickname, Iterable):
+            nicknames = (bot.config.nickname,)
         else:
-            nicknames = filter(lambda n: n, bot.config.NICKNAME)
+            nicknames = filter(lambda n: n, bot.config.nickname)
         nickname_regex = "|".join(nicknames)
         m = re.search(rf"^({nickname_regex})([\s,，]*|$)", first_text,
                       re.IGNORECASE)
diff --git a/nonebot/config.py b/nonebot/config.py
index 1680f40c..70b8e3cb 100644
--- a/nonebot/config.py
+++ b/nonebot/config.py
@@ -211,10 +211,10 @@ class Config(BaseConfig):
 
         SUPER_USERS=[12345789]
     """
-    nickname: Union[str, Set[str]] = ""
+    nickname: Set[str] = set()
     """
-    - 类型: ``Union[str, Set[str]]``
-    - 默认值: ``""``
+    - 类型: ``Set[str]``
+    - 默认值: ``set()``
     - 说明:
       机器人昵称。
     """
diff --git a/tests/.env.dev b/tests/.env.dev
index 9e330159..96101fd4 100644
--- a/tests/.env.dev
+++ b/tests/.env.dev
@@ -4,6 +4,7 @@ PORT=2333
 DEBUG=true
 
 SUPERUSERS=[123123123]
+NICKNAME=["bot"]
 
 COMMAND_START=["", "/", "#"]
 COMMAND_SEP=["/", "."]