Migrate to Discord.py 2.0a0

Since the Discord.py repository has been archived, we can switch to the latest commit of 2.0a0, knowing no breaking change will occur (still pinned to the commit just in case).
This commits fixes any problem related to the migration:
- New avatar interface
- TZ aware datetimes
- Various inernal API changes

28 files changed, 174 insertions, 139 deletions

diff --git a/bot/converters.py b/bot/converters.py
index bd4044c7e..2e2d3d4c9 100644
--- a/bot/converters.py
+++ b/bot/converters.py
@@ -266,7 +266,7 @@ class Snowflake(IDConverter):
         snowflake = int(arg)
 
         try:
-            time = snowflake_time(snowflake)
+            time = snowflake_time(snowflake).replace(tzinfo=None)
         except (OverflowError, OSError) as e:
             # Not sure if this can ever even happen, but let's be safe.
             raise BadArgument(f"{error}: {e}")
diff --git a/bot/exts/filters/antispam.py b/bot/exts/filters/antispam.py
index 8c075fa95..7c4e3e0f5 100644
--- a/bot/exts/filters/antispam.py
+++ b/bot/exts/filters/antispam.py
@@ -103,7 +103,7 @@ class DeletionContext:
             colour=Colour(Colours.soft_red),
             title="Spam detected!",
             text=mod_alert_message,
-            thumbnail=last_message.author.avatar_url_as(static_format="png"),
+            thumbnail=last_message.author.avatar.url,
             channel_id=Channels.mod_alerts,
             ping_everyone=AntiSpamConfig.ping_everyone
         )
@@ -171,7 +171,9 @@ class AntiSpam(Cog):
         self.cache.append(message)
 
         earliest_relevant_at = datetime.utcnow() - timedelta(seconds=self.max_interval)
-        relevant_messages = list(takewhile(lambda msg: msg.created_at > earliest_relevant_at, self.cache))
+        relevant_messages = list(
+            takewhile(lambda msg: msg.created_at.replace(tzinfo=None) > earliest_relevant_at, self.cache)
+        )
 
         for rule_name in AntiSpamConfig.rules:
             rule_config = AntiSpamConfig.rules[rule_name]
@@ -180,7 +182,9 @@ class AntiSpam(Cog):
             # Create a list of messages that were sent in the interval that the rule cares about.
             latest_interesting_stamp = datetime.utcnow() - timedelta(seconds=rule_config['interval'])
             messages_for_rule = list(
-                takewhile(lambda msg: msg.created_at > latest_interesting_stamp, relevant_messages)
+                takewhile(
+                    lambda msg: msg.created_at.replace(tzinfo=None) > latest_interesting_stamp, relevant_messages
+                )
             )
 
             result = await rule_function(message, messages_for_rule, rule_config)
diff --git a/bot/exts/filters/filtering.py b/bot/exts/filters/filtering.py
index 10cc7885d..f29ba4694 100644
--- a/bot/exts/filters/filtering.py
+++ b/bot/exts/filters/filtering.py
@@ -226,7 +226,7 @@ class Filtering(Cog):
                 title="Username filtering alert",
                 text=log_string,
                 channel_id=Channels.mod_alerts,
-                thumbnail=member.avatar_url
+                thumbnail=member.avatar.url
             )
 
             # Update time when alert sent
@@ -386,7 +386,7 @@ class Filtering(Cog):
             colour=Colour(Colours.soft_red),
             title=f"{_filter['type'].title()} triggered!",
             text=message,
-            thumbnail=msg.author.avatar_url_as(static_format="png"),
+            thumbnail=msg.author.avatar.url,
             channel_id=Channels.mod_alerts,
             ping_everyone=ping_everyone,
             additional_embeds=stats.additional_embeds,
diff --git a/bot/exts/filters/token_remover.py b/bot/exts/filters/token_remover.py
index 93f1f3c33..3c66a70f4 100644
--- a/bot/exts/filters/token_remover.py
+++ b/bot/exts/filters/token_remover.py
@@ -108,7 +108,7 @@ class TokenRemover(Cog):
             colour=Colour(Colours.soft_red),
             title="Token removed!",
             text=log_message + "\n" + userid_message,
-            thumbnail=msg.author.avatar_url_as(static_format="png"),
+            thumbnail=msg.author.avatar.url,
             channel_id=Channels.mod_alerts,
             ping_everyone=mention_everyone,
         )
diff --git a/bot/exts/filters/webhook_remover.py b/bot/exts/filters/webhook_remover.py
index 25e267426..cc639b5fb 100644
--- a/bot/exts/filters/webhook_remover.py
+++ b/bot/exts/filters/webhook_remover.py
@@ -63,7 +63,7 @@ class WebhookRemover(Cog):
             colour=Colour(Colours.soft_red),
             title="Discord webhook URL removed!",
             text=message,
-            thumbnail=msg.author.avatar_url_as(static_format="png"),
+            thumbnail=msg.author.avatar.url,
             channel_id=Channels.mod_alerts
         )
 
diff --git a/bot/exts/fun/duck_pond.py b/bot/exts/fun/duck_pond.py
index 7f7e4585c..2b32f7acc 100644
--- a/bot/exts/fun/duck_pond.py
+++ b/bot/exts/fun/duck_pond.py
@@ -93,7 +93,7 @@ class DuckPond(Cog):
                 webhook=self.webhook,
                 content=message.clean_content,
                 username=message.author.display_name,
-                avatar_url=message.author.avatar_url
+                avatar_url=message.author.avatar.url
             )
 
         if message.attachments:
@@ -108,7 +108,7 @@ class DuckPond(Cog):
                     webhook=self.webhook,
                     embed=e,
                     username=message.author.display_name,
-                    avatar_url=message.author.avatar_url
+                    avatar_url=message.author.avatar.url
                 )
             except discord.HTTPException:
                 log.exception("Failed to send an attachment to the webhook")
diff --git a/bot/exts/info/information.py b/bot/exts/info/information.py
index 51d47b75c..aa7c72872 100644
--- a/bot/exts/info/information.py
+++ b/bot/exts/info/information.py
@@ -313,7 +313,7 @@ class Information(Cog):
         for field_name, field_content in fields:
             embed.add_field(name=field_name, value=field_content, inline=False)
 
-        embed.set_thumbnail(url=user.avatar_url_as(static_format="png"))
+        embed.set_thumbnail(url=user.avatar.url)
         embed.colour = user.colour if user.colour != Colour.default() else Colour.blurple()
 
         return embed
diff --git a/bot/exts/moderation/defcon.py b/bot/exts/moderation/defcon.py
index 6ac077b93..08032c543 100644
--- a/bot/exts/moderation/defcon.py
+++ b/bot/exts/moderation/defcon.py
@@ -137,7 +137,7 @@ class Defcon(Cog):
 
                 await self.mod_log.send_log_message(
                     Icons.defcon_denied, Colours.soft_red, "Entry denied",
-                    message, member.avatar_url_as(static_format="png")
+                    message, member.avatar.url
                 )
 
     @group(name='defcon', aliases=('dc',), invoke_without_command=True)
diff --git a/bot/exts/moderation/incidents.py b/bot/exts/moderation/incidents.py
index 561e0251e..fe7f234be 100644
--- a/bot/exts/moderation/incidents.py
+++ b/bot/exts/moderation/incidents.py
@@ -93,7 +93,7 @@ async def make_embed(incident: discord.Message, outcome: Signal, actioned_by: di
         timestamp=datetime.utcnow(),
         colour=colour,
     )
-    embed.set_footer(text=footer, icon_url=actioned_by.avatar_url)
+    embed.set_footer(text=footer, icon_url=actioned_by.avatar.url)
 
     if incident.attachments:
         attachment = incident.attachments[0]  # User-sent messages can only contain one attachment
@@ -252,7 +252,7 @@ class Incidents(Cog):
             await webhook.send(
                 embed=embed,
                 username=sub_clyde(incident.author.name),
-                avatar_url=incident.author.avatar_url,
+                avatar_url=incident.author.avatar.url,
                 file=attachment_file,
             )
         except Exception:
diff --git a/bot/exts/moderation/infraction/_scheduler.py b/bot/exts/moderation/infraction/_scheduler.py
index 6ba4e74e9..9f130f943 100644
--- a/bot/exts/moderation/infraction/_scheduler.py
+++ b/bot/exts/moderation/infraction/_scheduler.py
@@ -239,7 +239,7 @@ class InfractionScheduler:
             icon_url=icon,
             colour=Colours.soft_red,
             title=f"Infraction {log_title}: {' '.join(infr_type.split('_'))}",
-            thumbnail=user.avatar_url_as(static_format="png"),
+            thumbnail=user.avatar.url,
             text=textwrap.dedent(f"""
                 Member: {messages.format_user(user)}
                 Actor: {ctx.author.mention}{dm_log_text}{expiry_log_text}
@@ -333,7 +333,7 @@ class InfractionScheduler:
             icon_url=_utils.INFRACTION_ICONS[infr_type][1],
             colour=Colours.soft_green,
             title=f"Infraction {log_title}: {' '.join(infr_type.split('_'))}",
-            thumbnail=user.avatar_url_as(static_format="png"),
+            thumbnail=user.avatar.url,
             text="\n".join(f"{k}: {v}" for k, v in log_text.items()),
             footer=footer,
             content=log_content,
@@ -450,7 +450,7 @@ class InfractionScheduler:
             log_title = "expiration failed" if "Failure" in log_text else "expired"
 
             user = self.bot.get_user(user_id)
-            avatar = user.avatar_url_as(static_format="png") if user else None
+            avatar = user.avatar.url if user else None
 
             # Move reason to end so when reason is too long, this is not gonna cut out required items.
             log_text["Reason"] = log_text.pop("Reason")
diff --git a/bot/exts/moderation/infraction/management.py b/bot/exts/moderation/infraction/management.py
index 223a124d8..2f6aafa71 100644
--- a/bot/exts/moderation/infraction/management.py
+++ b/bot/exts/moderation/infraction/management.py
@@ -197,7 +197,7 @@ class ModManagement(commands.Cog):
 
         if user:
             user_text = messages.format_user(user)
-            thumbnail = user.avatar_url_as(static_format="png")
+            thumbnail = user.avatar.url
         else:
             user_text = f"<@{user_id}>"
             thumbnail = None
diff --git a/bot/exts/moderation/modlog.py b/bot/exts/moderation/modlog.py
index be2245650..18a0cb463 100644
--- a/bot/exts/moderation/modlog.py
+++ b/bot/exts/moderation/modlog.py
@@ -394,7 +394,7 @@ class ModLog(Cog, name="ModLog"):
         await self.send_log_message(
             Icons.user_ban, Colours.soft_red,
             "User banned", format_user(member),
-            thumbnail=member.avatar_url_as(static_format="png"),
+            thumbnail=member.avatar.url,
             channel_id=Channels.user_log
         )
 
@@ -415,7 +415,7 @@ class ModLog(Cog, name="ModLog"):
         await self.send_log_message(
             Icons.sign_in, Colours.soft_green,
             "User joined", message,
-            thumbnail=member.avatar_url_as(static_format="png"),
+            thumbnail=member.avatar.url,
             channel_id=Channels.user_log
         )
 
@@ -432,7 +432,7 @@ class ModLog(Cog, name="ModLog"):
         await self.send_log_message(
             Icons.sign_out, Colours.soft_red,
             "User left", format_user(member),
-            thumbnail=member.avatar_url_as(static_format="png"),
+            thumbnail=member.avatar.url,
             channel_id=Channels.user_log
         )
 
@@ -449,7 +449,7 @@ class ModLog(Cog, name="ModLog"):
         await self.send_log_message(
             Icons.user_unban, Colour.blurple(),
             "User unbanned", format_user(member),
-            thumbnail=member.avatar_url_as(static_format="png"),
+            thumbnail=member.avatar.url,
             channel_id=Channels.mod_log
         )
 
@@ -515,7 +515,7 @@ class ModLog(Cog, name="ModLog"):
             colour=Colour.blurple(),
             title="Member updated",
             text=message,
-            thumbnail=after.avatar_url_as(static_format="png"),
+            thumbnail=after.avatar.url,
             channel_id=Channels.user_log
         )
 
@@ -820,7 +820,7 @@ class ModLog(Cog, name="ModLog"):
             colour=colour,
             title="Voice state updated",
             text=message,
-            thumbnail=member.avatar_url_as(static_format="png"),
+            thumbnail=member.avatar.url,
             channel_id=Channels.voice_log
         )
 
diff --git a/bot/exts/moderation/silence.py b/bot/exts/moderation/silence.py
index 95e2792c3..366d4e1f5 100644
--- a/bot/exts/moderation/silence.py
+++ b/bot/exts/moderation/silence.py
@@ -9,6 +9,7 @@ from async_rediscache import RedisCache
 from discord import Guild, PermissionOverwrite, TextChannel, VoiceChannel
 from discord.ext import commands, tasks
 from discord.ext.commands import Context
+from discord.utils import MISSING
 
 from bot import constants
 from bot.bot import Bot
@@ -47,7 +48,16 @@ class SilenceNotifier(tasks.Loop):
     """Loop notifier for posting notices to `alert_channel` containing added channels."""
 
     def __init__(self, alert_channel: TextChannel):
-        super().__init__(self._notifier, seconds=1, minutes=0, hours=0, count=None, reconnect=True, loop=None)
+        super().__init__(
+            self._notifier,
+            seconds=1,
+            minutes=0,
+            hours=0,
+            count=None,
+            reconnect=True,
+            loop=None,
+            time=MISSING
+        )
         self._silenced_channels = {}
         self._alert_channel = alert_channel
 
diff --git a/bot/exts/moderation/watchchannels/_watchchannel.py b/bot/exts/moderation/watchchannels/_watchchannel.py
index 146426569..38a82e8a2 100644
--- a/bot/exts/moderation/watchchannels/_watchchannel.py
+++ b/bot/exts/moderation/watchchannels/_watchchannel.py
@@ -246,7 +246,7 @@ class WatchChannel(metaclass=CogABCMeta):
             await self.webhook_send(
                 cleaned_content,
                 username=msg.author.display_name,
-                avatar_url=msg.author.avatar_url
+                avatar_url=msg.author.avatar.url
             )
 
         if msg.attachments:
@@ -260,7 +260,7 @@ class WatchChannel(metaclass=CogABCMeta):
                 await self.webhook_send(
                     embed=e,
                     username=msg.author.display_name,
-                    avatar_url=msg.author.avatar_url
+                    avatar_url=msg.author.avatar.url
                 )
             except discord.HTTPException as exc:
                 self.log.exception(
@@ -297,7 +297,7 @@ class WatchChannel(metaclass=CogABCMeta):
         embed = Embed(description=f"{msg.author.mention} {message_jump}")
         embed.set_footer(text=textwrap.shorten(footer, width=256, placeholder="..."))
 
-        await self.webhook_send(embed=embed, username=msg.author.display_name, avatar_url=msg.author.avatar_url)
+        await self.webhook_send(embed=embed, username=msg.author.display_name, avatar_url=msg.author.avatar.url)
 
     async def list_watched_users(
         self, ctx: Context, oldest_first: bool = False, update_cache: bool = True
diff --git a/bot/exts/utils/clean.py b/bot/exts/utils/clean.py
index cb662e852..7163e4f59 100644
--- a/bot/exts/utils/clean.py
+++ b/bot/exts/utils/clean.py
@@ -107,7 +107,7 @@ class Clean(Cog):
         elif regex:
             predicate = predicate_regex          # Delete messages that match regex
         else:
-            predicate = None                     # Delete all messages
+            predicate = lambda *_: True          # Delete all messages
 
         # Default to using the invoking context's channel
         if not channels:
diff --git a/bot/exts/utils/ping.py b/bot/exts/utils/ping.py
index cf0e3265e..43d371d87 100644
--- a/bot/exts/utils/ping.py
+++ b/bot/exts/utils/ping.py
@@ -32,7 +32,7 @@ class Latency(commands.Cog):
         """
         # datetime.datetime objects do not have the "milliseconds" attribute.
         # It must be converted to seconds before converting to milliseconds.
-        bot_ping = (datetime.utcnow() - ctx.message.created_at).total_seconds() * 1000
+        bot_ping = (datetime.utcnow() - ctx.message.created_at.replace(tzinfo=None)).total_seconds() * 1000
         if bot_ping <= 0:
             bot_ping = "Your clock is out of sync, could not calculate ping."
         else:
diff --git a/bot/utils/checks.py b/bot/utils/checks.py
index 3d0c8a50c..fc0397fd0 100644
--- a/bot/utils/checks.py
+++ b/bot/utils/checks.py
@@ -134,7 +134,7 @@ def cooldown_with_role_bypass(rate: int, per: float, type: BucketType = BucketTy
     bypass = set(bypass_roles)
 
     # this handles the actual cooldown logic
-    buckets = CooldownMapping(Cooldown(rate, per, type))
+    buckets = CooldownMapping(Cooldown(rate, per), type)
 
     # will be called after the command has been parse but before it has been invoked, ensures that
     # the cooldown won't be updated if the user screws up their input to the command
@@ -149,7 +149,7 @@ def cooldown_with_role_bypass(rate: int, per: float, type: BucketType = BucketTy
         bucket = buckets.get_bucket(ctx.message)
         retry_after = bucket.update_rate_limit(current)
         if retry_after:
-            raise CommandOnCooldown(bucket, retry_after)
+            raise CommandOnCooldown(bucket, retry_after, type)
 
     def wrapper(command: Command) -> Command:
         # NOTE: this could be changed if a subclass of Command were to be used. I didn't see the need for it
diff --git a/bot/utils/messages.py b/bot/utils/messages.py
index abeb04021..913dd72d4 100644
--- a/bot/utils/messages.py
+++ b/bot/utils/messages.py
@@ -121,7 +121,7 @@ async def send_attachments(
     """
     webhook_send_kwargs = {
         'username': message.author.display_name,
-        'avatar_url': message.author.avatar_url,
+        'avatar_url': message.author.avatar.url,
     }
     webhook_send_kwargs.update(kwargs)
     webhook_send_kwargs['username'] = sub_clyde(webhook_send_kwargs['username'])
diff --git a/poetry.lock b/poetry.lock
index 81b51b8da..4068bec12 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -264,19 +264,23 @@ murmur = ["mmh3"]
 
 [[package]]
 name = "discord.py"
-version = "1.7.3"
+version = "2.0.0a0"
 description = "A Python wrapper for the Discord API"
 category = "main"
 optional = false
-python-versions = ">=3.5.3"
+python-versions = ">=3.8.0"
 
 [package.dependencies]
 aiohttp = ">=3.6.0,<3.8.0"
 
 [package.extras]
-docs = ["sphinx (==3.0.3)", "sphinxcontrib-trio (==1.1.2)", "sphinxcontrib-websupport"]
+docs = ["sphinx (==4.0.2)", "sphinxcontrib-trio (==1.1.2)", "sphinxcontrib-websupport"]
+speed = ["orjson (>=3.5.4)"]
 voice = ["PyNaCl (>=1.3.0,<1.5)"]
 
+[package.source]
+type = "url"
+url = "https://github.com/Rapptz/discord.py/archive/45d498c1b76deaf3b394d17ccf56112fa691d160.zip"
 [[package]]
 name = "distlib"
 version = "0.3.2"
@@ -539,7 +543,7 @@ python-versions = "*"
 
 [[package]]
 name = "more-itertools"
-version = "8.8.0"
+version = "8.9.0"
 description = "More routines for operating on iterables, beyond itertools"
 category = "main"
 optional = false
@@ -627,7 +631,7 @@ test = ["docutils", "pytest-cov", "pytest-pycodestyle", "pytest-runner"]
 
 [[package]]
 name = "platformdirs"
-version = "2.2.0"
+version = "2.3.0"
 description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
 category = "dev"
 optional = false
@@ -639,18 +643,19 @@ test = ["appdirs (==1.4.4)", "pytest (>=6)", "pytest-cov (>=2.7)", "pytest-mock
 
 [[package]]
 name = "pluggy"
-version = "0.13.1"
+version = "1.0.0"
 description = "plugin and hook calling mechanisms for python"
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+python-versions = ">=3.6"
 
 [package.extras]
 dev = ["pre-commit", "tox"]
+testing = ["pytest", "pytest-benchmark"]
 
 [[package]]
 name = "pre-commit"
-version = "2.14.0"
+version = "2.15.0"
 description = "A framework for managing and maintaining multi-language pre-commit hooks."
 category = "dev"
 optional = false
@@ -761,7 +766,7 @@ python-versions = "*"
 
 [[package]]
 name = "pytest"
-version = "6.2.4"
+version = "6.2.5"
 description = "pytest: simple powerful testing with Python"
 category = "dev"
 optional = false
@@ -773,7 +778,7 @@ attrs = ">=19.2.0"
 colorama = {version = "*", markers = "sys_platform == \"win32\""}
 iniconfig = "*"
 packaging = "*"
-pluggy = ">=0.12,<1.0.0a1"
+pluggy = ">=0.12,<2.0"
 py = ">=1.8.2"
 toml = "*"
 
@@ -873,7 +878,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*"
 
 [[package]]
 name = "rapidfuzz"
-version = "1.5.0"
+version = "1.5.1"
 description = "rapid fuzzy string matching"
 category = "main"
 optional = false
@@ -1016,7 +1021,7 @@ python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
 [[package]]
 name = "typing-extensions"
-version = "3.10.0.0"
+version = "3.10.0.2"
 description = "Backported and Experimental Type Hints for Python 3.5+"
 category = "main"
 optional = false
@@ -1069,7 +1074,7 @@ multidict = ">=4.0"
 [metadata]
 lock-version = "1.1"
 python-versions = "3.9.*"
-content-hash = "ceddbb2621849f480f736985d71f37cebefd08a9b38bc3943a6f72706258b6ee"
+content-hash = "f57b80eeba96037ea6ff08d033a7cea7a0b2e47711b64cb0a67fb73d0a03be64"
 
 [metadata.files]
 aio-pika = [
@@ -1289,10 +1294,7 @@ deepdiff = [
     {file = "deepdiff-4.3.2-py3-none-any.whl", hash = "sha256:59fc1e3e7a28dd0147b0f2b00e3e27181f0f0ef4286b251d5f214a5bcd9a9bc4"},
     {file = "deepdiff-4.3.2.tar.gz", hash = "sha256:91360be1d9d93b1d9c13ae9c5048fa83d9cff17a88eb30afaa0d7ff2d0fee17d"},
 ]
-"discord.py" = [
-    {file = "discord.py-1.7.3-py3-none-any.whl", hash = "sha256:c6f64db136de0e18e090f6752ea68bdd4ab0a61b82dfe7acecefa22d6477bb0c"},
-    {file = "discord.py-1.7.3.tar.gz", hash = "sha256:462cd0fe307aef8b29cbfa8dd613e548ae4b2cb581d46da9ac0d46fb6ea19408"},
-]
+"discord.py" = []
 distlib = [
     {file = "distlib-0.3.2-py2.py3-none-any.whl", hash = "sha256:23e223426b28491b1ced97dc3bbe183027419dfc7982b4fa2f05d5f3ff10711c"},
     {file = "distlib-0.3.2.zip", hash = "sha256:106fef6dc37dd8c0e2c0a60d3fca3e77460a48907f335fa28420463a6f799736"},
@@ -1470,8 +1472,8 @@ mccabe = [
     {file = "mccabe-0.6.1.tar.gz", hash = "sha256:dd8d182285a0fe56bace7f45b5e7d1a6ebcbf524e8f3bd87eb0f125271b8831f"},
 ]
 more-itertools = [
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+    {file = "rapidfuzz-1.5.1-cp39-cp39-win_amd64.whl", hash = "sha256:46f5931f7441e13574d0fe33e897212d00ff63f69c0db1d449afbc5e87bafd7f"},
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+    {file = "rapidfuzz-1.5.1-pp36-pypy36_pp73-manylinux1_x86_64.whl", hash = "sha256:e738ec4e680bebe4442befda5cdd18020c3721d4cd75f9bfe2fb94e78ef55618"},
+    {file = "rapidfuzz-1.5.1-pp36-pypy36_pp73-manylinux2010_x86_64.whl", hash = "sha256:cb083609923bc4ac602e6f1d61be61a25b35cccfb5ee208d2aa89eb0be357c69"},
+    {file = "rapidfuzz-1.5.1-pp36-pypy36_pp73-win32.whl", hash = "sha256:08ecef2995b6ed1187b375d8f28ba4557522f098a1515b6afb0e3b452997a3a4"},
+    {file = "rapidfuzz-1.5.1-pp37-pypy37_pp73-macosx_10_9_x86_64.whl", hash = "sha256:b6ff10d856fce55e2b1c681e4e7cd7da9b9eb6854571df60d6ed8904c777e64b"},
+    {file = "rapidfuzz-1.5.1-pp37-pypy37_pp73-manylinux1_x86_64.whl", hash = "sha256:b41c346f16cd1ee71b259106d3cfad3347bd8fff4ff20f334a12738df6736c01"},
+    {file = "rapidfuzz-1.5.1-pp37-pypy37_pp73-manylinux2010_x86_64.whl", hash = "sha256:f7148a53a0fd3466b82b81d94ad91aee7ce7947f37f16f9fb54319ea7df7f4af"},
+    {file = "rapidfuzz-1.5.1-pp37-pypy37_pp73-win32.whl", hash = "sha256:31d83af9ac39f47f47ce4830ee118e6fa53964cccd8161e9a478a326f2a994cf"},
+    {file = "rapidfuzz-1.5.1.tar.gz", hash = "sha256:4ebbd071425ee812548c301c60661a4f8faa5e5bcc97a6f0bef5b562585a8025"},
 ]
 redis = [
     {file = "redis-3.5.3-py2.py3-none-any.whl", hash = "sha256:432b788c4530cfe16d8d943a09d40ca6c16149727e4afe8c2c9d5580c59d9f24"},
@@ -1857,9 +1859,9 @@ toml = [
     {file = "toml-0.10.2.tar.gz", hash = "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"},
 ]
 typing-extensions = [
-    {file = "typing_extensions-3.10.0.0-py2-none-any.whl", hash = "sha256:0ac0f89795dd19de6b97debb0c6af1c70987fd80a2d62d1958f7e56fcc31b497"},
-    {file = "typing_extensions-3.10.0.0-py3-none-any.whl", hash = "sha256:779383f6086d90c99ae41cf0ff39aac8a7937a9283ce0a414e5dd782f4c94a84"},
-    {file = "typing_extensions-3.10.0.0.tar.gz", hash = "sha256:50b6f157849174217d0656f99dc82fe932884fb250826c18350e159ec6cdf342"},
+    {file = "typing_extensions-3.10.0.2-py2-none-any.whl", hash = "sha256:d8226d10bc02a29bcc81df19a26e56a9647f8b0a6d4a83924139f4a8b01f17b7"},
+    {file = "typing_extensions-3.10.0.2-py3-none-any.whl", hash = "sha256:f1d25edafde516b146ecd0613dabcc61409817af4766fbbcfb8d1ad4ec441a34"},
+    {file = "typing_extensions-3.10.0.2.tar.gz", hash = "sha256:49f75d16ff11f1cd258e1b988ccff82a3ca5570217d7ad8c5f48205dd99a677e"},
 ]
 urllib3 = [
     {file = "urllib3-1.26.6-py2.py3-none-any.whl", hash = "sha256:39fb8672126159acb139a7718dd10806104dec1e2f0f6c88aab05d17df10c8d4"},
diff --git a/pyproject.toml b/pyproject.toml
index 23cbba19b..6a4cc5bed 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,6 +7,7 @@ license = "MIT"
 
 [tool.poetry.dependencies]
 python = "3.9.*"
+"discord.py" = {url = "https://github.com/Rapptz/discord.py/archive/45d498c1b76deaf3b394d17ccf56112fa691d160.zip"}
 aio-pika = "~=6.1"
 aiodns = "~=2.0"
 aiohttp = "~=3.7"
@@ -17,7 +18,6 @@ beautifulsoup4 = "~=4.9"
 colorama = { version = "~=0.4.3", markers = "sys_platform == 'win32'" }
 coloredlogs = "~=14.0"
 deepdiff = "~=4.0"
-"discord.py" = "~=1.7.3"
 emoji = "~=0.6"
 feedparser = "~=6.0.2"
 rapidfuzz = "~=1.4"
diff --git a/tests/base.py b/tests/base.py
index d99b9ac31..79ff5bc7e 100644
--- a/tests/base.py
+++ b/tests/base.py
@@ -102,4 +102,4 @@ class CommandTestCase(unittest.IsolatedAsyncioTestCase):
         with self.assertRaises(commands.MissingPermissions) as cm:
             await cmd.can_run(ctx)
 
-        self.assertCountEqual(permissions.keys(), cm.exception.missing_perms)
+        self.assertCountEqual(permissions.keys(), cm.exception.missing_permissions)
diff --git a/tests/bot/exts/backend/test_error_handler.py b/tests/bot/exts/backend/test_error_handler.py
index 2b0549b98..462f718e6 100644
--- a/tests/bot/exts/backend/test_error_handler.py
+++ b/tests/bot/exts/backend/test_error_handler.py
@@ -107,7 +107,7 @@ class ErrorHandlerTests(unittest.IsolatedAsyncioTestCase):
         """Should send error with `ctx.send` when error is `CommandOnCooldown`."""
         self.ctx.reset_mock()
         cog = ErrorHandler(self.bot)
-        error = errors.CommandOnCooldown(10, 9)
+        error = errors.CommandOnCooldown(10, 9, type=None)
         self.assertIsNone(await cog.on_command_error(self.ctx, error))
         self.ctx.send.assert_awaited_once_with(error)
 
diff --git a/tests/bot/exts/filters/test_token_remover.py b/tests/bot/exts/filters/test_token_remover.py
index 51feae9cb..47aae97c4 100644
--- a/tests/bot/exts/filters/test_token_remover.py
+++ b/tests/bot/exts/filters/test_token_remover.py
@@ -26,7 +26,7 @@ class TokenRemoverTests(unittest.IsolatedAsyncioTestCase):
         self.msg.guild.get_member.return_value.bot = False
         self.msg.guild.get_member.return_value.__str__.return_value = "Woody"
         self.msg.author.__str__ = MagicMock(return_value=self.msg.author.name)
-        self.msg.author.avatar_url_as.return_value = "picture-lemon.png"
+        self.msg.author.avatar.url = "picture-lemon.png"
 
     def test_extract_user_id_valid(self):
         """Should consider user IDs valid if they decode into an integer ID."""
@@ -375,7 +375,7 @@ class TokenRemoverTests(unittest.IsolatedAsyncioTestCase):
             colour=Colour(constants.Colours.soft_red),
             title="Token removed!",
             text=log_msg + "\n" + userid_log_message,
-            thumbnail=self.msg.author.avatar_url_as.return_value,
+            thumbnail=self.msg.author.avatar.url,
             channel_id=constants.Channels.mod_alerts,
             ping_everyone=True,
         )
diff --git a/tests/bot/exts/info/test_information.py b/tests/bot/exts/info/test_information.py
index d8250befb..2e992c13b 100644
--- a/tests/bot/exts/info/test_information.py
+++ b/tests/bot/exts/info/test_information.py
@@ -84,7 +84,7 @@ class InformationCogTests(unittest.IsolatedAsyncioTestCase):
 
         self.assertEqual(dummy_embed.fields[0].value, str(dummy_role.id))
         self.assertEqual(dummy_embed.fields[1].value, f"#{dummy_role.colour.value:0>6x}")
-        self.assertEqual(dummy_embed.fields[2].value, "0.63 0.48 218")
+        self.assertEqual(dummy_embed.fields[2].value, "0.65 0.64 242")
         self.assertEqual(dummy_embed.fields[3].value, "1")
         self.assertEqual(dummy_embed.fields[4].value, "10")
         self.assertEqual(dummy_embed.fields[5].value, "0")
@@ -435,10 +435,9 @@ class UserEmbedTests(unittest.IsolatedAsyncioTestCase):
         ctx = helpers.MockContext()
 
         user = helpers.MockMember(id=217, colour=0)
-        user.avatar_url_as.return_value = "avatar url"
+        user.avatar.url = "avatar url"
         embed = await self.cog.create_user_embed(ctx, user)
 
-        user.avatar_url_as.assert_called_once_with(static_format="png")
         self.assertEqual(embed.thumbnail.url, "avatar url")
 
 
diff --git a/tests/bot/exts/moderation/test_incidents.py b/tests/bot/exts/moderation/test_incidents.py
index cbf7f7bcf..a356e245f 100644
--- a/tests/bot/exts/moderation/test_incidents.py
+++ b/tests/bot/exts/moderation/test_incidents.py
@@ -3,7 +3,7 @@ import enum
 import logging
 import typing as t
 import unittest
-from unittest.mock import AsyncMock, MagicMock, call, patch
+from unittest.mock import AsyncMock, MagicMock, Mock, call, patch
 
 import aiohttp
 import discord
@@ -379,7 +379,7 @@ class TestArchive(TestIncidents):
         # Define our own `incident` to be archived
         incident = MockMessage(
             content="this is an incident",
-            author=MockUser(name="author_name", avatar_url="author_avatar"),
+            author=MockUser(name="author_name", avatar=Mock(url="author_avatar")),
             id=123,
         )
         built_embed = MagicMock(discord.Embed, id=123)  # We patch `make_embed` to return this
diff --git a/tests/bot/utils/test_checks.py b/tests/bot/utils/test_checks.py
index 883465e0b..4ae11d5d3 100644
--- a/tests/bot/utils/test_checks.py
+++ b/tests/bot/utils/test_checks.py
@@ -32,6 +32,7 @@ class ChecksTests(unittest.IsolatedAsyncioTestCase):
     async def test_has_no_roles_check_without_guild(self):
         """`has_no_roles_check` should return `False` when `Context.guild` is None."""
         self.ctx.channel = MagicMock(DMChannel)
+        self.ctx.guild = None
         self.assertFalse(await checks.has_no_roles_check(self.ctx))
 
     async def test_has_no_roles_check_returns_false_with_unwanted_role(self):
diff --git a/tests/helpers.py b/tests/helpers.py
index 3978076ed..d3967af59 100644
--- a/tests/helpers.py
+++ b/tests/helpers.py
@@ -39,7 +39,7 @@ class HashableMixin(discord.mixins.EqualityComparable):
 
 
 class ColourMixin:
-    """A mixin for Mocks that provides the aliasing of color->colour like discord.py does."""
+    """A mixin for Mocks that provides the aliasing of (accent_)color->(accent_)colour like discord.py does."""
 
     @property
     def color(self) -> discord.Colour:
@@ -49,6 +49,14 @@ class ColourMixin:
     def color(self, color: discord.Colour) -> None:
         self.colour = color
 
+    @property
+    def accent_color(self) -> discord.Colour:
+        return self.accent_colour
+
+    @accent_color.setter
+    def accent_color(self, color: discord.Colour) -> None:
+        self.accent_colour = color
+
 
 class CustomMockMixin:
     """
@@ -241,7 +249,13 @@ class MockMember(CustomMockMixin, unittest.mock.Mock, ColourMixin, HashableMixin
 
 
 # Create a User instance to get a realistic Mock of `discord.User`
-user_instance = discord.User(data=unittest.mock.MagicMock(), state=unittest.mock.MagicMock())
+_user_data_mock = collections.defaultdict(unittest.mock.MagicMock, {
+    "accent_color": 0
+})
+user_instance = discord.User(
+    data=unittest.mock.MagicMock(get=unittest.mock.Mock(side_effect=_user_data_mock.get)),
+    state=unittest.mock.MagicMock()
+)
 
 
 class MockUser(CustomMockMixin, unittest.mock.Mock, ColourMixin, HashableMixin):
@@ -424,7 +438,12 @@ message_instance = discord.Message(state=state, channel=channel, data=message_da
 
 
 # Create a Context instance to get a realistic MagicMock of `discord.ext.commands.Context`
-context_instance = Context(message=unittest.mock.MagicMock(), prefix=unittest.mock.MagicMock())
+context_instance = Context(
+    message=unittest.mock.MagicMock(),
+    prefix="$",
+    bot=MockBot(),
+    view=None
+)
 context_instance.invoked_from_error_handler = None
 
 
@@ -532,7 +551,7 @@ class MockReaction(CustomMockMixin, unittest.mock.MagicMock):
         self.__str__.return_value = str(self.emoji)
 
 
-webhook_instance = discord.Webhook(data=unittest.mock.MagicMock(), adapter=unittest.mock.MagicMock())
+webhook_instance = discord.Webhook(data=unittest.mock.MagicMock(), session=unittest.mock.MagicMock())
 
 
 class MockAsyncWebhook(CustomMockMixin, unittest.mock.MagicMock):
diff --git a/tox.ini b/tox.ini
index b8293a3b6..9472c32f9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@ import-order-style=pycharm
 application_import_names=bot,tests
 exclude=.cache,.venv,.git,constants.py
 ignore=
-    B311,W503,E226,S311,T000
+    B311,W503,E226,S311,T000,E731
     # Missing Docstrings
     D100,D104,D105,D107,
     # Docstring Whitespace