diff --git a/.codecov.yml b/.codecov.yml
deleted file mode 100644
index 23325110..00000000
--- a/.codecov.yml
+++ /dev/null
@@ -1,57 +0,0 @@
-codecov:
-  require_ci_to_pass: yes
-  notify:
-    after_n_builds: 6
-    wait_for_ci: yes
-
-coverage:
-  precision: 2
-  round: down
-  range: "70...100"
-  status:
-    project:
-      default: false
-      bot:
-        paths:
-          - 'modmail/'
-        # basic
-        target: auto
-        threshold: 5%
-        base: auto
-        flags:
-          - unit
-       # advanced settings
-        branches:
-          - main
-        if_ci_failed: ignore #success, failure, error, ignore
-        informational: true
-        only_pulls: true
-    patch:
-      default:
-        # basic
-        target: auto
-        threshold: 5%
-        base: auto
-        # advanced
-        branches:
-          - main
-        if_ci_failed: ignore #success, failure, error, ignore
-        informational: true
-        only_pulls: true
-
-
-parsers:
-  gcov:
-    branch_detection:
-      conditional: yes
-      loop: yes
-      method: no
-      macro: no
-
-comment:
-  layout: "reach,diff,flags,files,footer"
-  behavior: default
-  require_changes: no
-
-github_checks:
-  annotations: false
diff --git a/.github/workflows/lint_test.yml b/.github/workflows/lint_test.yml
index 6db38e31..4a7bceed 100644
--- a/.github/workflows/lint_test.yml
+++ b/.github/workflows/lint_test.yml
@@ -92,11 +92,14 @@ jobs:
       # black and flake8 action. As pre-commit does not support user installs,
       # we set PIP_USER=0 to not do a user install.
       - name: Run pre-commit hooks
+        id: pre-commit
         run: export PIP_USER=0; SKIP="no-commit-to-branch,black,flake8" pre-commit run --all-files
 
       # Run black seperately as we don't want to reformat the files
       # just error if something isn't formatted correctly.
       - name: Check files with black
+        id: black
+        if: always() && (steps.pre-commit.outcome == 'success' || steps.pre-commit.outcome == 'failure')
         run: black . --check --diff --color
 
       # Run flake8 and have it format the linting errors in the format of
@@ -108,6 +111,8 @@ jobs:
       # Format used:
       # ::error file={filename},line={line},col={col}::{message}
       - name: Run flake8
+        id: flake8
+        if: always() && (steps.pre-commit.outcome == 'success' || steps.pre-commit.outcome == 'failure')
         run: "flake8 \
         --format='::error file=%(path)s,line=%(row)d,col=%(col)d::\
         [flake8] %(code)s: %(text)s'"
@@ -162,12 +167,50 @@ jobs:
       # This is saved to ./.coverage to be used by codecov to link a
       # coverage report to github.
       - name: Run tests and generate coverage report
-        run: python -m pytest -n auto --dist loadfile --cov --disable-warnings -q
+        id: run_tests
+        run: python -m pytest tests -n auto --dist loadfile --cov --disable-warnings -q
 
-      # This step will publish the coverage reports to codecov.io and
+      # This step will publish the coverage reports to coveralls.io and
       # print a "job" link in the output of the GitHub Action
-      - name: Publish coverage report to codecov.io
-        run: python -m codecov
+      - name: Publish coverage report to coveralls.io
+        # upload coverage even if a test run failed
+        # this is a test, and may be removed in the future
+        if: always() && (steps.run_tests.outcome == 'success' || steps.run_tests.outcome == 'failure')
+        # important that we don't fail the workflow when coveralls is down
+        continue-on-error: true
+        env:
+          COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          COVERALLS_FLAG_NAME: coverage-${{ runner.os }}-python-${{ env.PYTHON_VERSION }}
+          COVERALLS_PARALLEL: true
+          COVERALLS_SERVICE_NAME: github
+        run: python -m coveralls
+
+  coveralls-finish:
+    name: Indicate completion to coveralls.io
+    runs-on: ubuntu-latest
+    needs: test
+    # we don't want to fail the workflow when coveralls is down
+    continue-on-error: true
+    # we always want to ensure we attempt to send a finish to coveralls
+    if: always()
+    steps:
+      # Set up a consistent version of Python
+    - name: Set up Python 3.9
+      id: python
+      uses: actions/setup-python@v2
+      with:
+        python-version: '3.9'
+    - name: Coveralls Finished
+      continue-on-error: true
+      env:
+        COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        COVERALLS_SERVICE_NAME: github
+      # NOTE: this has a small thing where this will not always be the same with the poetry.lock file
+      # given how this is installed for one api request, its not worth pinning to me.
+      # any bugs caused by this can be solved when they occur
+      run: |
+        python3 -m pip install --upgrade coveralls
+        python3 -m coveralls --finish
 
   artifact:
     name: Generate Artifact
diff --git a/README.md b/README.md
index 2e521aee..214746f2 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,7 @@
 # Discord Modmail
 
 [![Lint & Test](https://img.shields.io/github/workflow/status/discord-modmail/modmail/Lint%20&%20Test/main?label=Lint+%26+Test&logo=github&style=flat)](https://github.com/discord-modmail/modmail/actions/workflows/lint_test.yml "Lint and Test")
-[![Code Coverage](https://img.shields.io/codecov/c/gh/discord-modmail/modmail/main?logo=codecov&style=flat&label=Code+Coverage)](https://app.codecov.io/gh/discord-modmail/modmail "Code Coverage")
-[![Codacy Grade](https://img.shields.io/codacy/grade/78be21a49835484595aea556d5920638?logo=codacy&style=flat&label=Code+Quality)](https://www.codacy.com/gh/discord-modmail/modmail/dashboard "Codacy Grade")
+[![Code Coverage](https://img.shields.io/coveralls/github/discord-modmail/modmail?logo=coveralls&style=flat&label=Code+Coverage)](https://coveralls.io/github/discord-modmail/modmail)
 [![Python](https://img.shields.io/static/v1?label=Python&message=3.8+%7C+3.9&color=blue&logo=Python&style=flat)](https://www.python.org/downloads/ "Python 3.8 | 3.9")
 [![License](https://img.shields.io/github/license/discord-modmail/modmail?style=flat&label=License)](./LICENSE "License file")
 [![Code Style](https://img.shields.io/static/v1?label=Code%20Style&message=black&color=000000&style=flat)](https://github.com/psf/black "The uncompromising python formatter")
diff --git a/modmail/__init__.py b/modmail/__init__.py
index 9377ffd2..1c3966eb 100644
--- a/modmail/__init__.py
+++ b/modmail/__init__.py
@@ -1,5 +1,7 @@
+import asyncio
 import logging
 import logging.handlers
+import os
 from pathlib import Path
 
 import coloredlogs
@@ -7,6 +9,12 @@
 from modmail.log import ModmailLogger
 
 
+# On windows aiodns's asyncio support relies on APIs like add_reader (which aiodns uses)
+# are not guaranteed to be available, and in particular are not available when using the
+# ProactorEventLoop on Windows, this method is only supported with Windows SelectorEventLoop
+if os.name == "nt":
+    asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())
+
 logging.TRACE = 5
 logging.NOTICE = 25
 logging.addLevelName(logging.TRACE, "TRACE")
diff --git a/modmail/bot.py b/modmail/bot.py
index de27ea08..06de9ea1 100644
--- a/modmail/bot.py
+++ b/modmail/bot.py
@@ -1,12 +1,12 @@
 import asyncio
 import logging
 import signal
+import socket
 import typing as t
-from typing import Any
 
+import aiohttp
 import arrow
 import discord
-from aiohttp import ClientSession
 from discord import Activity, AllowedMentions, Intents
 from discord.client import _cleanup_loop
 from discord.ext import commands
@@ -41,9 +41,12 @@ class ModmailBot(commands.Bot):
     def __init__(self, **kwargs):
         self.config = CONFIG
         self.start_time: t.Optional[arrow.Arrow] = None  # arrow.utcnow()
-        self.http_session: t.Optional[ClientSession] = None
+        self.http_session: t.Optional[aiohttp.ClientSession] = None
         self.dispatcher = Dispatcher()
 
+        self._connector = None
+        self._resolver = None
+
         status = discord.Status.online
         activity = Activity(type=discord.ActivityType.listening, name="users dming me!")
         # listen to messages mentioning the bot or matching the prefix
@@ -65,6 +68,24 @@ def __init__(self, **kwargs):
             **kwargs,
         )
 
+    async def create_connectors(self, *args, **kwargs) -> None:
+        """Re-create the connector and set up sessions before logging into Discord."""
+        # Use asyncio for DNS resolution instead of threads so threads aren't spammed.
+        self._resolver = aiohttp.AsyncResolver()
+
+        # Use AF_INET as its socket family to prevent HTTPS related problems both locally
+        # and in production.
+        self._connector = aiohttp.TCPConnector(
+            resolver=self._resolver,
+            family=socket.AF_INET,
+        )
+
+        # Client.login() will call HTTPClient.static_login() which will create a session using
+        # this connector attribute.
+        self.http.connector = self._connector
+
+        self.http_session = aiohttp.ClientSession(connector=self._connector)
+
     async def start(self, token: str, reconnect: bool = True) -> None:
         """
         Start the bot.
@@ -74,8 +95,8 @@ async def start(self, token: str, reconnect: bool = True) -> None:
         """
         try:
             # create the aiohttp session
-            self.http_session = ClientSession(loop=self.loop)
-            self.logger.trace("Created ClientSession.")
+            await self.create_connectors()
+            self.logger.trace("Created aiohttp.ClientSession.")
             # set start time to when we started the bot.
             # This is now, since we're about to connect to the gateway.
             # This should also be before we load any extensions, since if they have a load time, it should
@@ -122,7 +143,7 @@ def run(self, *args, **kwargs) -> None:
         except NotImplementedError:
             pass
 
-        def stop_loop_on_completion(f: Any) -> None:
+        def stop_loop_on_completion(f: t.Any) -> None:
             loop.stop()
 
         future = asyncio.ensure_future(self.start(*args, **kwargs), loop=loop)
@@ -164,10 +185,16 @@ async def close(self) -> None:
             except Exception:
                 self.logger.error(f"Exception occured while removing cog {cog.name}", exc_info=True)
 
+        await super().close()
+
         if self.http_session:
             await self.http_session.close()
 
-        await super().close()
+        if self._connector:
+            await self._connector.close()
+
+        if self._resolver:
+            await self._resolver.close()
 
     def load_extensions(self) -> None:
         """Load all enabled extensions."""
diff --git a/poetry.lock b/poetry.lock
index 71294634..936ceab3 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -31,6 +31,17 @@ yarl = ">=1.0,<2.0"
 [package.extras]
 speedups = ["aiodns", "brotlipy", "cchardet"]
 
+[[package]]
+name = "aioresponses"
+version = "0.7.2"
+description = "Mock out requests made by ClientSession from aiohttp package"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+aiohttp = ">=2.0.0,<4.0.0"
+
 [[package]]
 name = "arrow"
 version = "1.1.1"
@@ -84,21 +95,6 @@ python-versions = ">=2.7"
 docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
 testing = ["pytest (>=4.6)", "pytest-flake8", "pytest-cov", "pytest-black (>=0.3.7)", "pytest-mypy", "pytest-checkdocs (>=2.4)", "pytest-enabler (>=1.0.1)"]
 
-[[package]]
-name = "bandit"
-version = "1.7.0"
-description = "Security oriented static analyser for python code."
-category = "dev"
-optional = false
-python-versions = ">=3.5"
-
-[package.dependencies]
-colorama = {version = ">=0.3.9", markers = "platform_system == \"Windows\""}
-GitPython = ">=1.0.1"
-PyYAML = ">=5.3.1"
-six = ">=1.10.0"
-stevedore = ">=1.20.0"
-
 [[package]]
 name = "black"
 version = "21.8b0"
@@ -202,18 +198,6 @@ python-versions = ">=3.6"
 [package.dependencies]
 colorama = {version = "*", markers = "platform_system == \"Windows\""}
 
-[[package]]
-name = "codecov"
-version = "2.1.12"
-description = "Hosted coverage reports for GitHub, Bitbucket and Gitlab"
-category = "dev"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-
-[package.dependencies]
-coverage = "*"
-requests = ">=2.7.9"
-
 [[package]]
 name = "colorama"
 version = "0.4.4"
@@ -238,7 +222,7 @@ cron = ["capturer (>=2.4)"]
 
 [[package]]
 name = "coverage"
-version = "6.0.2"
+version = "6.1.2"
 description = "Code coverage measurement for Python"
 category = "dev"
 optional = false
@@ -250,6 +234,22 @@ tomli = {version = "*", optional = true, markers = "extra == \"toml\""}
 [package.extras]
 toml = ["tomli"]
 
+[[package]]
+name = "coveralls"
+version = "3.3.1"
+description = "Show coverage stats online via coveralls.io"
+category = "dev"
+optional = false
+python-versions = ">= 3.5"
+
+[package.dependencies]
+coverage = ">=4.1,<6.0.0 || >6.1,<6.1.1 || >6.1.1,<7.0"
+docopt = ">=0.6.1"
+requests = ">=1.0.0"
+
+[package.extras]
+yaml = ["PyYAML (>=3.10)"]
+
 [[package]]
 name = "discord.py"
 version = "2.0.0a0"
@@ -278,6 +278,14 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "docopt"
+version = "0.6.2"
+description = "Pythonic argument parser, that will make you smile"
+category = "dev"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "execnet"
 version = "1.9.0"
@@ -321,20 +329,6 @@ python-versions = ">=3.6.1,<4.0.0"
 [package.dependencies]
 flake8 = ">=3.7,<4.0"
 
-[[package]]
-name = "flake8-bandit"
-version = "2.1.2"
-description = "Automated security testing with bandit and flake8."
-category = "dev"
-optional = false
-python-versions = "*"
-
-[package.dependencies]
-bandit = "*"
-flake8 = "*"
-flake8-polyfill = "*"
-pycodestyle = "*"
-
 [[package]]
 name = "flake8-bugbear"
 version = "20.11.1"
@@ -436,29 +430,6 @@ python-dateutil = ">=2.8.1"
 [package.extras]
 dev = ["twine", "markdown", "flake8"]
 
-[[package]]
-name = "gitdb"
-version = "4.0.7"
-description = "Git Object Database"
-category = "dev"
-optional = false
-python-versions = ">=3.4"
-
-[package.dependencies]
-smmap = ">=3.0.1,<5"
-
-[[package]]
-name = "gitpython"
-version = "3.1.20"
-description = "Python Git Library"
-category = "dev"
-optional = false
-python-versions = ">=3.6"
-
-[package.dependencies]
-gitdb = ">=4.0.1,<5"
-typing-extensions = {version = ">=3.7.4.3", markers = "python_version < \"3.10\""}
-
 [[package]]
 name = "humanfriendly"
 version = "10.0"
@@ -688,14 +659,6 @@ category = "dev"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
 
-[[package]]
-name = "pbr"
-version = "5.6.0"
-description = "Python Build Reasonableness"
-category = "dev"
-optional = false
-python-versions = ">=2.6"
-
 [[package]]
 name = "pep8-naming"
 version = "0.12.1"
@@ -1050,14 +1013,6 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
 
-[[package]]
-name = "smmap"
-version = "4.0.0"
-description = "A pure Python implementation of a sliding window memory map manager"
-category = "dev"
-optional = false
-python-versions = ">=3.5"
-
 [[package]]
 name = "snowballstemmer"
 version = "2.1.0"
@@ -1066,17 +1021,6 @@ category = "dev"
 optional = false
 python-versions = "*"
 
-[[package]]
-name = "stevedore"
-version = "3.4.0"
-description = "Manage dynamic plugins for Python applications"
-category = "dev"
-optional = false
-python-versions = ">=3.6"
-
-[package.dependencies]
-pbr = ">=2.0.0,<2.1.0 || >2.1.0"
-
 [[package]]
 name = "taskipy"
 version = "1.8.1"
@@ -1206,7 +1150,7 @@ testing = ["pytest (>=4.6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytes
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.8"
-content-hash = "b85bebf7a796b0b37e647fd7289589ea03a147c155839dfd1bcd561ead1fde92"
+content-hash = "aaa5181c8d94a936811266da090c02a531780a7beaf35985198b82a06f5b306b"
 
 [metadata.files]
 aiodns = [
@@ -1252,6 +1196,10 @@ aiohttp = [
     {file = "aiohttp-3.7.4.post0-cp39-cp39-win_amd64.whl", hash = "sha256:02f46fc0e3c5ac58b80d4d56eb0a7c7d97fcef69ace9326289fb9f1955e65cfe"},
     {file = "aiohttp-3.7.4.post0.tar.gz", hash = "sha256:493d3299ebe5f5a7c66b9819eacdcfbbaaf1a8e84911ddffcdc48888497afecf"},
 ]
+aioresponses = [
+    {file = "aioresponses-0.7.2-py2.py3-none-any.whl", hash = "sha256:2f8ff624543066eb465b0238de68d29231e8488f41dc4b5a9dae190982cdae50"},
+    {file = "aioresponses-0.7.2.tar.gz", hash = "sha256:82e495d118b74896aa5b4d47e17effb5e2cc783e510ae395ceade5e87cabe89a"},
+]
 arrow = [
     {file = "arrow-1.1.1-py3-none-any.whl", hash = "sha256:77a60a4db5766d900a2085ce9074c5c7b8e2c99afeaa98ad627637ff6f292510"},
     {file = "arrow-1.1.1.tar.gz", hash = "sha256:dee7602f6c60e3ec510095b5e301441bc56288cb8f51def14dcb3079f623823a"},
@@ -1272,10 +1220,6 @@ attrs = [
     {file = "backports.entry_points_selectable-1.1.0-py2.py3-none-any.whl", hash = "sha256:a6d9a871cde5e15b4c4a53e3d43ba890cc6861ec1332c9c2428c92f977192acc"},
     {file = "backports.entry_points_selectable-1.1.0.tar.gz", hash = "sha256:988468260ec1c196dab6ae1149260e2f5472c9110334e5d51adcb77867361f6a"},
 ]
-bandit = [
-    {file = "bandit-1.7.0-py3-none-any.whl", hash = "sha256:216be4d044209fa06cf2a3e51b319769a51be8318140659719aa7a115c35ed07"},
-    {file = "bandit-1.7.0.tar.gz", hash = "sha256:8a4c7415254d75df8ff3c3b15cfe9042ecee628a1e40b44c15a98890fbfc2608"},
-]
 black = [
     {file = "black-21.8b0-py3-none-any.whl", hash = "sha256:2a0f9a8c2b2a60dbcf1ccb058842fb22bdbbcb2f32c6cc02d9578f90b92ce8b7"},
     {file = "black-21.8b0.tar.gz", hash = "sha256:570608d28aa3af1792b98c4a337dbac6367877b47b12b88ab42095cfc1a627c2"},
@@ -1422,11 +1366,6 @@ click = [
     {file = "click-8.0.3-py3-none-any.whl", hash = "sha256:353f466495adaeb40b6b5f592f9f91cb22372351c84caeb068132442a4518ef3"},
     {file = "click-8.0.3.tar.gz", hash = "sha256:410e932b050f5eed773c4cda94de75971c89cdb3155a72a0831139a79e5ecb5b"},
 ]
-codecov = [
-    {file = "codecov-2.1.12-py2.py3-none-any.whl", hash = "sha256:585dc217dc3d8185198ceb402f85d5cb5dbfa0c5f350a5abcdf9e347776a5b47"},
-    {file = "codecov-2.1.12-py3.8.egg", hash = "sha256:782a8e5352f22593cbc5427a35320b99490eb24d9dcfa2155fd99d2b75cfb635"},
-    {file = "codecov-2.1.12.tar.gz", hash = "sha256:a0da46bb5025426da895af90938def8ee12d37fcbcbbbc15b6dc64cf7ebc51c1"},
-]
 colorama = [
     {file = "colorama-0.4.4-py2.py3-none-any.whl", hash = "sha256:9f47eda37229f68eee03b24b9748937c7dc3868f906e8ba69fbcbdd3bc5dc3e2"},
     {file = "colorama-0.4.4.tar.gz", hash = "sha256:5941b2b48a20143d2267e95b1c2a7603ce057ee39fd88e7329b0c292aa16869b"},
@@ -1436,45 +1375,66 @@ coloredlogs = [
     {file = "coloredlogs-15.0.1.tar.gz", hash = "sha256:7c991aa71a4577af2f82600d8f8f3a89f936baeaf9b50a9c197da014e5bf16b0"},
 ]
 coverage = [
-    {file = "coverage-6.0.2-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:1549e1d08ce38259de2bc3e9a0d5f3642ff4a8f500ffc1b2df73fd621a6cdfc0"},
-    {file = "coverage-6.0.2-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:bcae10fccb27ca2a5f456bf64d84110a5a74144be3136a5e598f9d9fb48c0caa"},
-    {file = "coverage-6.0.2-cp310-cp310-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:53a294dc53cfb39c74758edaa6305193fb4258a30b1f6af24b360a6c8bd0ffa7"},
-    {file = "coverage-6.0.2-cp310-cp310-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:8251b37be1f2cd9c0e5ccd9ae0380909c24d2a5ed2162a41fcdbafaf59a85ebd"},
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-]
 humanfriendly = [
     {file = "humanfriendly-10.0-py2.py3-none-any.whl", hash = "sha256:1697e1a8a8f550fd43c2865cd84542fc175a61dcb779b6fee18cf6b6ccba1477"},
     {file = "humanfriendly-10.0.tar.gz", hash = "sha256:6b0b831ce8f15f7300721aa49829fc4e83921a9a301cc7f606be6686a2288ddc"},
@@ -1738,10 +1687,6 @@ pathspec = [
     {file = "pathspec-0.9.0-py2.py3-none-any.whl", hash = "sha256:7d15c4ddb0b5c802d161efc417ec1a2558ea2653c2e8ad9c19098201dc1c993a"},
     {file = "pathspec-0.9.0.tar.gz", hash = "sha256:e564499435a2673d586f6b2130bb5b95f04a3ba06f81b8f895b651a3c76aabb1"},
 ]
-pbr = [
-    {file = "pbr-5.6.0-py2.py3-none-any.whl", hash = "sha256:c68c661ac5cc81058ac94247278eeda6d2e6aecb3e227b0387c30d277e7ef8d4"},
-    {file = "pbr-5.6.0.tar.gz", hash = "sha256:42df03e7797b796625b1029c0400279c7c34fd7df24a7d7818a1abb5b38710dd"},
-]
 pep8-naming = [
     {file = "pep8-naming-0.12.1.tar.gz", hash = "sha256:bb2455947757d162aa4cad55dba4ce029005cd1692f2899a21d51d8630ca7841"},
     {file = "pep8_naming-0.12.1-py2.py3-none-any.whl", hash = "sha256:4a8daeaeb33cfcde779309fc0c9c0a68a3bbe2ad8a8308b763c5068f86eb9f37"},
@@ -2001,18 +1946,10 @@ six = [
     {file = "six-1.16.0-py2.py3-none-any.whl", hash = "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"},
     {file = "six-1.16.0.tar.gz", hash = "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926"},
 ]
-smmap = [
-    {file = "smmap-4.0.0-py2.py3-none-any.whl", hash = "sha256:a9a7479e4c572e2e775c404dcd3080c8dc49f39918c2cf74913d30c4c478e3c2"},
-    {file = "smmap-4.0.0.tar.gz", hash = "sha256:7e65386bd122d45405ddf795637b7f7d2b532e7e401d46bbe3fb49b9986d5182"},
-]
 snowballstemmer = [
     {file = "snowballstemmer-2.1.0-py2.py3-none-any.whl", hash = "sha256:b51b447bea85f9968c13b650126a888aabd4cb4463fca868ec596826325dedc2"},
     {file = "snowballstemmer-2.1.0.tar.gz", hash = "sha256:e997baa4f2e9139951b6f4c631bad912dfd3c792467e2f03d7239464af90e914"},
 ]
-stevedore = [
-    {file = "stevedore-3.4.0-py3-none-any.whl", hash = "sha256:920ce6259f0b2498aaa4545989536a27e4e4607b8318802d7ddc3a533d3d069e"},
-    {file = "stevedore-3.4.0.tar.gz", hash = "sha256:59b58edb7f57b11897f150475e7bc0c39c5381f0b8e3fa9f5c20ce6c89ec4aa1"},
-]
 taskipy = [
     {file = "taskipy-1.8.1-py3-none-any.whl", hash = "sha256:2b98f499966e40175d1f1306a64587f49dfa41b90d0d86c8f28b067cc58d0a56"},
     {file = "taskipy-1.8.1.tar.gz", hash = "sha256:7a2404125817e45d80e13fa663cae35da6e8ba590230094e815633653e25f98f"},
diff --git a/pyproject.toml b/pyproject.toml
index 245c8fad..c2d4b071 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,7 +34,6 @@ taskipy = "^1.6.0"
 black = "^21.7b0"
 flake8 = "~=3.8"
 flake8-annotations = "~=2.3"
-flake8-bandit = "^2.1.2"
 flake8-bugbear = "~=20.1"
 flake8-docstrings = "~=1.5"
 flake8-isort = "^4.0.0"
@@ -44,8 +43,9 @@ flake8-todo = "~=0.7"
 isort = "^5.9.2"
 pep8-naming = "~=0.11"
 # testing
-codecov = "^2.1.11"
+aioresponses = "^0.7.2"
 coverage = { extras = ["toml"], version = "^6.0.2" }
+coveralls = "^3.3.1"
 pytest = "^6.2.4"
 pytest-asyncio = "^0.15.1"
 pytest-cov = "^3.0.0"
@@ -65,7 +65,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.coverage.run]
 branch = true
-source_pkgs = ['modmail', 'tests.modmail']
+source_pkgs = ['modmail', 'tests']
 omit = ["modmail/plugins/**.*"]
 
 [tool.pytest.ini_options]
@@ -81,13 +81,13 @@ include = '\.pyi?$'
 [tool.taskipy.tasks]
 start = { cmd = "python -m modmail", help = "Run bot" }
 black = { cmd = "black --check .", help = "dry run of black" }
-codecov-validate = { cmd = "curl --data-binary @.codecov.yml https://codecov.io/validate", help = "Validate `.codecov.yml` with their api." }
 cov-server = { cmd = "coverage html", help = "Start an http.server for viewing coverage data." }
 post_cov-server = "python -m http.server 8012 --bind 127.0.0.1 --directory htmlcov"
 docs = { cmd = "mkdocs serve", help = "Run the docs on a local automatically reloading server" }
 export = { cmd = "python -m scripts.export_requirements", help = "Export the requirements from poetry.lock to requirements.txt" }
 flake8 = { cmd = "python -m flake8", help = "Lints code with flake8" }
 lint = { cmd = "pre-commit run --all-files", help = "Checks all files for CI errors" }
+lock = { cmd = 'poetry lock --no-update && task export --docs', help = 'Relock the dependencies without updating them. Also runs the export scripts' }
 precommit = { cmd = "pre-commit install --install-hooks", help = "Installs the precommit hook" }
 report = { cmd = "coverage report", help = "Show coverage report from previously run tests." }
 scripts = { cmd = 'python -m scripts', help = 'Run the scripts wrapper cli.' }
diff --git a/tests/conftest.py b/tests/conftest.py
index 5871ed8e..40c3ae9c 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1 +1,29 @@
+import aiohttp
+import aioresponses
 import pytest
+
+
+@pytest.fixture
+def aioresponse():
+    """Fixture to mock aiohttp responses."""
+    with aioresponses.aioresponses() as aioresponse:
+        yield aioresponse
+
+
+@pytest.fixture
+@pytest.mark.asyncio
+async def http_session(aioresponse) -> aiohttp.ClientSession:
+    """
+    Fixture function for a aiohttp.ClientSession.
+
+    Requests fixture aioresponse to ensure that all client sessions do not make actual requests.
+    """
+    resolver = aiohttp.AsyncResolver()
+    connector = aiohttp.TCPConnector(resolver=resolver)
+    client_session = aiohttp.ClientSession(connector=connector)
+
+    yield client_session
+
+    await client_session.close()
+    await connector.close()
+    await resolver.close()
diff --git a/tests/test_fixtures.py b/tests/test_fixtures.py
new file mode 100644
index 00000000..906c3301
--- /dev/null
+++ b/tests/test_fixtures.py
@@ -0,0 +1,42 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+import aiohttp
+import pytest
+
+
+if TYPE_CHECKING:
+    import aioresponses
+
+
+class TestSessionFixture:
+    """Grouping for aiohttp.ClientSession fixture tests."""
+
+    @pytest.mark.asyncio
+    async def test_session_fixture_no_requests(self, http_session: aiohttp.ClientSession):
+        """
+        Test all requests fail.
+
+        This means that aioresponses is being requested by the http_session fixture.
+        """
+        url = "https://github.com/"
+
+        with pytest.raises(aiohttp.ClientConnectionError):
+            await http_session.get(url)
+
+    @pytest.mark.asyncio
+    async def test_session_fixture_mock_requests(
+        self, aioresponse: aioresponses.aioresponses, http_session: aiohttp.ClientSession
+    ):
+        """
+        Test all requests fail.
+
+        This means that aioresponses is being requested by the http_session fixture.
+        """
+        url = "https://github.com/"
+        status = 200
+        aioresponse.get(url, status=status)
+
+        async with http_session.get(url) as resp:
+            assert status == resp.status