diff --git a/discord/ext/test/backend.py b/discord/ext/test/backend.py
index 5afb4dc..d734460 100644
--- a/discord/ext/test/backend.py
+++ b/discord/ext/test/backend.py
@@ -221,15 +221,7 @@ async def edit_message(self, channel_id: int, message_id: int, **fields: dhttp.M
 
         await callbacks.dispatch_event("edit_message", message.channel, message, fields)
 
-        out = facts.dict_from_message(message)
-        payload = fields.get("params").payload
-        # TODO : do something for files and stuff.
-        # if params.files:
-        #     return self.request(r, files=params.files, form=params.multipart)
-        # else:
-        #     return self.request(r, json=params.payload)
-        out.update(payload)
-        return out
+        return edit_message(message, **fields)
 
     async def add_reaction(self, channel_id: int, message_id: int, emoji: str) -> None:
         locs = _get_higher_locs(1)
@@ -853,6 +845,27 @@ def make_message(
     return state._get_message(data["id"])
 
 
+def edit_message(
+        message: discord.Message, **fields: dhttp.MultipartParameters
+) -> _types.JsonDict:
+    data = facts.dict_from_message(message)
+    payload = fields.get("params").payload
+    # TODO : do something for files and stuff.
+    # if params.files:
+    #     return self.request(r, files=params.files, form=params.multipart)
+    # else:
+    #     return self.request(r, json=params.payload)
+    data.update(payload)
+
+    i = 0
+    while i < len(_cur_config.messages[message.channel.id]):
+        if _cur_config.messages[message.channel.id][i].get("id") == data.get("id"):
+            _cur_config.messages[message.channel.id][i] = data
+        i += 1
+
+    return data
+
+
 MEMBER_MENTION: typing.Pattern = re.compile(r"<@!?[0-9]{17,21}>", re.MULTILINE)
 ROLE_MENTION: typing.Pattern = re.compile(r"<@&([0-9]{17,21})>", re.MULTILINE)
 CHANNEL_MENTION: typing.Pattern = re.compile(r"<#[0-9]{17,21}>", re.MULTILINE)
diff --git a/tests/test_edit.py b/tests/test_edit.py
index b1dc888..49847a7 100644
--- a/tests/test_edit.py
+++ b/tests/test_edit.py
@@ -9,6 +9,10 @@ async def test_edit(bot):
     channel = guild.channels[0]
 
     mes = await channel.send("Test Message")
+    persisted_mes1 = await channel.fetch_message(mes.id)
     edited_mes = await mes.edit(content="New Message")
+    persisted_mes2 = await channel.fetch_message(mes.id)
 
     assert edited_mes.content == "New Message"
+    assert persisted_mes1.content == "Test Message"
+    assert persisted_mes2.content == "New Message"