diff --git a/nonebot/adapters/cqhttp.py b/nonebot/adapters/cqhttp.py
index 6424c1d0..19614ccd 100644
--- a/nonebot/adapters/cqhttp.py
+++ b/nonebot/adapters/cqhttp.py
@@ -84,6 +84,9 @@ def _check_at_me(bot: "Bot", event: "Event"):
         if first_msg_seg == at_me_seg:
             event.to_me = True
             del event.message[0]
+            if event.message[0].type == "text":
+                event.message[0].data["text"] = event.message[0].data[
+                    "text"].lstrip()
 
         if not event.to_me:
             # check the last segment
diff --git a/nonebot/plugin.py b/nonebot/plugin.py
index ba526fcf..4dbfcd81 100644
--- a/nonebot/plugin.py
+++ b/nonebot/plugin.py
@@ -151,6 +151,8 @@ def on_command(cmd: Union[str, Tuple[str, ...]],
 
     async def _strip_cmd(bot, event, state: dict):
         message = event.message
+        print(message[0].data)
+        print(state["_prefix"])
         event.message = message.__class__(
             str(message)[len(state["_prefix"]["raw_command"]):].strip())
 
diff --git a/tests/bot.py b/tests/bot.py
index 31ffb6c8..b55faab4 100644
--- a/tests/bot.py
+++ b/tests/bot.py
@@ -20,7 +20,7 @@ nonebot.init()
 app = nonebot.get_asgi()
 
 # load builtin plugin
-nonebot.load_plugin("nonebot.plugins.base")
+nonebot.load_builtin_plugins()
 
 # load local plugins
 nonebot.load_plugins("test_plugins")
diff --git a/tests/test_plugins/test_message.py b/tests/test_plugins/test_message.py
index 76164bf7..e683b630 100644
--- a/tests/test_plugins/test_message.py
+++ b/tests/test_plugins/test_message.py
@@ -1,11 +1,12 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
+from nonebot.rule import to_me
 from nonebot.typing import Event
 from nonebot.plugin import on_message
 from nonebot.adapters.cqhttp import Bot
 
-test_message = on_message(state={"default": 1})
+test_message = on_message(to_me(), state={"default": 1})
 
 
 @test_message.handle()
diff --git a/tests/test_plugins/test_permission.py b/tests/test_plugins/test_permission.py
new file mode 100644
index 00000000..a7f577a7
--- /dev/null
+++ b/tests/test_plugins/test_permission.py
@@ -0,0 +1,15 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+from nonebot.rule import to_me
+from nonebot.typing import Event
+from nonebot.plugin import on_startswith
+from nonebot.adapters.cqhttp import Bot
+from nonebot.permission import GROUP_ADMIN
+
+test_command = on_startswith("hello", to_me(), permission=GROUP_ADMIN)
+
+
+@test_command.handle()
+async def test_handler(bot: Bot, event: Event, state: dict):
+    await test_command.finish("hello")