diff --git a/poetry.lock b/poetry.lock
index 439e9ac..95c12da 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -242,22 +242,6 @@ python-versions = "*"
 flake8 = ">=3"
 pydocstyle = ">=2.1"
 
-[[package]]
-name = "flake8-isort"
-version = "4.1.1"
-description = "flake8 plugin that integrates isort ."
-category = "dev"
-optional = false
-python-versions = "*"
-
-[package.dependencies]
-flake8 = ">=3.2.1,<5"
-isort = ">=4.3.5,<6"
-testfixtures = ">=6.8.0,<7"
-
-[package.extras]
-test = ["pytest-cov"]
-
 [[package]]
 name = "flake8-polyfill"
 version = "1.0.2"
@@ -582,19 +566,6 @@ mslex = {version = ">=0.3.0,<0.4.0", markers = "sys_platform == \"win32\""}
 psutil = ">=5.7.2,<6.0.0"
 toml = ">=0.10.0,<0.11.0"
 
-[[package]]
-name = "testfixtures"
-version = "6.18.3"
-description = "A collection of helpers and mock objects for unit tests and doc tests."
-category = "dev"
-optional = false
-python-versions = "*"
-
-[package.extras]
-build = ["setuptools-git", "twine", "wheel"]
-docs = ["django", "django (<2)", "mock", "sphinx", "sybil", "twisted", "zope.component"]
-test = ["django", "django (<2)", "mock", "pytest (>=3.6)", "pytest-cov", "pytest-django", "sybil", "twisted", "zope.component"]
-
 [[package]]
 name = "toml"
 version = "0.10.2"
@@ -663,7 +634,7 @@ multidict = ">=4.0"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.9.0"
-content-hash = "89bfcb528853c162769bb57754c12b678da8acce05a89dbd74579346bfdee889"
+content-hash = "34f3f8c455445471c46cc6cb535abf86528247f54399d5b45defb65a15b105d3"
 
 [metadata.files]
 aiohttp = [
@@ -825,10 +796,6 @@ flake8-docstrings = [
     {file = "flake8-docstrings-1.6.0.tar.gz", hash = "sha256:9fe7c6a306064af8e62a055c2f61e9eb1da55f84bb39caef2b84ce53708ac34b"},
     {file = "flake8_docstrings-1.6.0-py2.py3-none-any.whl", hash = "sha256:99cac583d6c7e32dd28bbfbef120a7c0d1b6dde4adb5a9fd441c4227a6534bde"},
 ]
-flake8-isort = [
-    {file = "flake8-isort-4.1.1.tar.gz", hash = "sha256:d814304ab70e6e58859bc5c3e221e2e6e71c958e7005239202fee19c24f82717"},
-    {file = "flake8_isort-4.1.1-py3-none-any.whl", hash = "sha256:c4e8b6dcb7be9b71a02e6e5d4196cefcef0f3447be51e82730fb336fff164949"},
-]
 flake8-polyfill = [
     {file = "flake8-polyfill-1.0.2.tar.gz", hash = "sha256:e44b087597f6da52ec6393a709e7108b2905317d0c0b744cdca6208e670d8eda"},
     {file = "flake8_polyfill-1.0.2-py2.py3-none-any.whl", hash = "sha256:12be6a34ee3ab795b19ca73505e7b55826d5f6ad7230d31b18e106400169b9e9"},
@@ -1182,10 +1149,6 @@ taskipy = [
     {file = "taskipy-1.9.0-py3-none-any.whl", hash = "sha256:02bd2c51c7356ed3f7f8853210ada1cd2ab273e68359ee865021c3057eec6615"},
     {file = "taskipy-1.9.0.tar.gz", hash = "sha256:449c160b557cdb1d9c17097a5ea4aa0cd5223723ddbaaa5d5032dd16274fb8f0"},
 ]
-testfixtures = [
-    {file = "testfixtures-6.18.3-py2.py3-none-any.whl", hash = "sha256:6ddb7f56a123e1a9339f130a200359092bd0a6455e31838d6c477e8729bb7763"},
-    {file = "testfixtures-6.18.3.tar.gz", hash = "sha256:2600100ae96ffd082334b378e355550fef8b4a529a6fa4c34f47130905c7426d"},
-]
 toml = [
     {file = "toml-0.10.2-py2.py3-none-any.whl", hash = "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b"},
     {file = "toml-0.10.2.tar.gz", hash = "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"},
diff --git a/pyproject.toml b/pyproject.toml
index 9dbeb80..09e1f25 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,6 @@ flake8 = "^3.9.2"
 flake8-annotations = "^2.6.2"
 flake8-bugbear = "^21.4.3"
 flake8-docstrings = "^1.6.0"
-flake8-isort = "^4.1.1"
 flake8-string-format = "^0.3.0"
 flake8-todo = "^0.7"
 isort = "^5.12.0"