diff --git a/.github/workflows/linting.yml b/.github/workflows/linting.yml
deleted file mode 100644
index a94ede00..00000000
--- a/.github/workflows/linting.yml
+++ /dev/null
@@ -1,27 +0,0 @@
-name: Linting
-
-on:
-  pull_request:
-    branches: [master]
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v2
-      - uses: ricardochaves/python-lint@v1.3.0
-        with:
-          python-root-list: "."
-          use-pylint: false
-          use-pycodestyle: false
-          use-flake8: true
-          use-black: false
-          use-mypy: false
-          use-isort: true
-          extra-pylint-options: ""
-          extra-pycodestyle-options: ""
-          extra-flake8-options: ""
-          extra-black-options: ""
-          extra-mypy-options: ""
-          extra-isort-options: ""
diff --git a/test-requirements.in b/test-requirements.in
index 78d67c59..49ac6d10 100644
--- a/test-requirements.in
+++ b/test-requirements.in
@@ -4,7 +4,6 @@ more-itertools
 wcwidth
 black
 coveralls
-flake8
 pylint
 pytest-cov
 mypy
diff --git a/test-requirements.txt b/test-requirements.txt
index 3992d92d..7ef1ad1d 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,5 +1,5 @@
 #
-# This file is autogenerated by pip-compile
+# This file is autogenerated by pip-compile with python 3.9
 # To update, run:
 #
 #    pip-compile --generate-hashes --output-file=test-requirements.txt test-requirements.in
@@ -95,10 +95,6 @@ coveralls==3.1.0 \
 docopt==0.6.2 \
     --hash=sha256:49b3a825280bd66b3aa83585ef59c4a8c82f2c8a522dbe754a8bc8d08c85c491
     # via coveralls
-flake8==3.9.2 \
-    --hash=sha256:07528381786f2a6237b061f6e96610a4167b226cb926e2aa2b6b1d78057c576b \
-    --hash=sha256:bf8fd333346d844f616e8d47905ef3a3384edae6b4e9beb0c5101e25e3110907
-    # via -r test-requirements.in
 idna==3.3 \
     --hash=sha256:84d9dd047ffa80596e0f246e2eab0b391788b0503584e8945f2368256d2735ff \
     --hash=sha256:9d643ff0a55b762d5cdb124b8eaa99c66322e2157b69160bc32796e824360e6d
@@ -106,12 +102,7 @@ idna==3.3 \
 importlib-metadata==4.8.2 \
     --hash=sha256:53ccfd5c134223e497627b9815d5030edf77d2ed573922f7a0b8f8bb81a1c100 \
     --hash=sha256:75bdec14c397f528724c1bfd9709d660b33a4d2e77387a3358f20b848bb5e5fb
-    # via
-    #   -r test-requirements.in
-    #   click
-    #   flake8
-    #   pluggy
-    #   pytest
+    # via -r test-requirements.in
 iniconfig==1.1.1 \
     --hash=sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3 \
     --hash=sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32
@@ -147,9 +138,7 @@ lazy-object-proxy==1.6.0 \
 mccabe==0.6.1 \
     --hash=sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42 \
     --hash=sha256:dd8d182285a0fe56bace7f45b5e7d1a6ebcbf524e8f3bd87eb0f125271b8831f
-    # via
-    #   flake8
-    #   pylint
+    # via pylint
 mock==4.0.3 \
     --hash=sha256:122fcb64ee37cfad5b3f48d7a7d51875d7031aaf3d8be7c42e2bee25044eee62 \
     --hash=sha256:7d3fbbde18228f4ff2f1f119a45cdffa458b4c0dee32eb4d2bb2f82554bac7bc
@@ -205,14 +194,6 @@ py==1.10.0 \
     --hash=sha256:21b81bda15b66ef5e1a777a21c4dcd9c20ad3efd0b3f817e7a809035269e1bd3 \
     --hash=sha256:3b80836aa6d1feeaa108e046da6423ab8f6ceda6468545ae8d02d9d58d18818a
     # via pytest
-pycodestyle==2.7.0 \
-    --hash=sha256:514f76d918fcc0b55c6680472f0a37970994e07bbb80725808c17089be302068 \
-    --hash=sha256:c389c1d06bf7904078ca03399a4816f974a1d590090fecea0c63ec26ebaf1cef
-    # via flake8
-pyflakes==2.3.1 \
-    --hash=sha256:7893783d01b8a89811dd72d7dfd4d84ff098e5eed95cfa8905b22bbffe52efc3 \
-    --hash=sha256:f5bc8ecabc05bb9d291eb5203d6810b49040f6ff446a756326104746cc00c1db
-    # via flake8
 pylint==2.9.3 \
     --hash=sha256:23a1dc8b30459d78e9ff25942c61bb936108ccbe29dd9e71c01dc8274961709a \
     --hash=sha256:5d46330e6b8886c31b5e3aba5ff48c10f4aa5e76cbf9002c6544306221e63fbc
@@ -290,48 +271,9 @@ tomli==1.2.1 \
     --hash=sha256:8dd0e9524d6f386271a36b41dbf6c57d8e32fd96fd22b6584679dc569d20899f \
     --hash=sha256:a5b75cb6f3968abb47af1b40c1819dc519ea82bcc065776a866e8d74c5ca9442
     # via black
-typed-ast==1.4.3 \
-    --hash=sha256:01ae5f73431d21eead5015997ab41afa53aa1fbe252f9da060be5dad2c730ace \
-    --hash=sha256:067a74454df670dcaa4e59349a2e5c81e567d8d65458d480a5b3dfecec08c5ff \
-    --hash=sha256:0fb71b8c643187d7492c1f8352f2c15b4c4af3f6338f21681d3681b3dc31a266 \
-    --hash=sha256:1b3ead4a96c9101bef08f9f7d1217c096f31667617b58de957f690c92378b528 \
-    --hash=sha256:2068531575a125b87a41802130fa7e29f26c09a2833fea68d9a40cf33902eba6 \
-    --hash=sha256:209596a4ec71d990d71d5e0d312ac935d86930e6eecff6ccc7007fe54d703808 \
-    --hash=sha256:2c726c276d09fc5c414693a2de063f521052d9ea7c240ce553316f70656c84d4 \
-    --hash=sha256:398e44cd480f4d2b7ee8d98385ca104e35c81525dd98c519acff1b79bdaac363 \
-    --hash=sha256:52b1eb8c83f178ab787f3a4283f68258525f8d70f778a2f6dd54d3b5e5fb4341 \
-    --hash=sha256:5feca99c17af94057417d744607b82dd0a664fd5e4ca98061480fd8b14b18d04 \
-    --hash=sha256:7538e495704e2ccda9b234b82423a4038f324f3a10c43bc088a1636180f11a41 \
-    --hash=sha256:760ad187b1041a154f0e4d0f6aae3e40fdb51d6de16e5c99aedadd9246450e9e \
-    --hash=sha256:777a26c84bea6cd934422ac2e3b78863a37017618b6e5c08f92ef69853e765d3 \
-    --hash=sha256:95431a26309a21874005845c21118c83991c63ea800dd44843e42a916aec5899 \
-    --hash=sha256:9ad2c92ec681e02baf81fdfa056fe0d818645efa9af1f1cd5fd6f1bd2bdfd805 \
-    --hash=sha256:9c6d1a54552b5330bc657b7ef0eae25d00ba7ffe85d9ea8ae6540d2197a3788c \
-    --hash=sha256:aee0c1256be6c07bd3e1263ff920c325b59849dc95392a05f258bb9b259cf39c \
-    --hash=sha256:af3d4a73793725138d6b334d9d247ce7e5f084d96284ed23f22ee626a7b88e39 \
-    --hash=sha256:b36b4f3920103a25e1d5d024d155c504080959582b928e91cb608a65c3a49e1a \
-    --hash=sha256:b9574c6f03f685070d859e75c7f9eeca02d6933273b5e69572e5ff9d5e3931c3 \
-    --hash=sha256:bff6ad71c81b3bba8fa35f0f1921fb24ff4476235a6e94a26ada2e54370e6da7 \
-    --hash=sha256:c190f0899e9f9f8b6b7863debfb739abcb21a5c054f911ca3596d12b8a4c4c7f \
-    --hash=sha256:c907f561b1e83e93fad565bac5ba9c22d96a54e7ea0267c708bffe863cbe4075 \
-    --hash=sha256:cae53c389825d3b46fb37538441f75d6aecc4174f615d048321b716df2757fb0 \
-    --hash=sha256:dd4a21253f42b8d2b48410cb31fe501d32f8b9fbeb1f55063ad102fe9c425e40 \
-    --hash=sha256:dde816ca9dac1d9c01dd504ea5967821606f02e510438120091b84e852367428 \
-    --hash=sha256:f2362f3cb0f3172c42938946dbc5b7843c2a28aec307c49100c8b38764eb6927 \
-    --hash=sha256:f328adcfebed9f11301eaedfa48e15bdece9b519fb27e6a8c01aa52a17ec31b3 \
-    --hash=sha256:f8afcf15cc511ada719a88e013cec87c11aff7b91f019295eb4530f96fe5ef2f \
-    --hash=sha256:fb1bbeac803adea29cedd70781399c99138358c26d05fcbd23c13016b7f5ec65
-    # via
-    #   astroid
-    #   black
-    #   mypy
 typing-extensions==4.0.0 \
     --hash=sha256:829704698b22e13ec9eaf959122315eabb370b0884400e9818334d8b677023d9
-    # via
-    #   astroid
-    #   black
-    #   importlib-metadata
-    #   mypy
+    # via mypy
 urllib3==1.26.7 \
     --hash=sha256:4987c65554f7a2dbf30c18fd48778ef124af6fab771a377103da0585e2336ece \
     --hash=sha256:c4fdf4019605b6e5423637e01bc9fe4daef873709a7973e195ceba0a62bbc844
@@ -347,3 +289,7 @@ zipp==3.5.0 \
     --hash=sha256:957cfda87797e389580cb8b9e3870841ca991e2125350677b2ca83a0e99390a3 \
     --hash=sha256:f5812b1e007e48cff63449a5e9f4e7ebea716b4111f9c4f9a645f91d579bf0c4
     # via importlib-metadata
+
+# WARNING: The following packages were not pinned, but pip requires them to be
+# pinned when the requirements file includes hashes. Consider using the --allow-unsafe flag.
+# setuptools
diff --git a/tox.ini b/tox.ini
index c041f514..ab6c04a9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,7 +12,8 @@ whitelist_externals=sh
 commands=
     mypy --install-types --non-interactive -p exodus_lambda -p tests
 	sh -c 'pylint exodus_lambda; test $(( $? & (1|2|4|32) )) = 0'
-	black --check .
+    black --check .
+    isort --check .
 
 [testenv:cov]
 usedevelop=true
@@ -65,6 +66,3 @@ addopts = -v
 
 [coverage:run]
 relative_files = true
-
-[flake8]
-max_line_length = 100