From f5dc400b58714eac331a2c87c3d1cc82d661666a Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 18:37:58 +0300
Subject: [PATCH 01/28] Run Flake8 only once on CI

---
 .github/workflows/flake8.yml         | 17 +++++++++++++++++
 .github/workflows/python-package.yml |  2 +-
 setup.cfg                            |  5 -----
 3 files changed, 18 insertions(+), 6 deletions(-)
 create mode 100644 .github/workflows/flake8.yml

diff --git a/.github/workflows/flake8.yml b/.github/workflows/flake8.yml
new file mode 100644
index 000000000..9198446dd
--- /dev/null
+++ b/.github/workflows/flake8.yml
@@ -0,0 +1,17 @@
+---
+name: Flake8
+
+on: push  # yamllint disable-line rule:truthy
+
+jobs:
+  flake8:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: TrueBrain/actions-flake8@v2
+        with:
+          plugins: >
+            flake8-2020>=1.6.1
+            flake8-bugbear>=22.1.11
+            flake8-comprehensions>=3.7.0
diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 80701edf3..1cdeee641 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -59,7 +59,7 @@ jobs:
           - '3.9'
           - '3.10'
         constraints: ['']
-        lint: ['--darker --flake8 --isort']
+        lint: ['--darker --isort']
         include:
           - os: ubuntu-latest
             python-version: '3.7'
diff --git a/setup.cfg b/setup.cfg
index af22cd34c..46a67c176 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -55,16 +55,11 @@ test =
     black>=21.7b1  # to prevent Mypy error about `gen_python_files`, see issue #189
     codespell>=2.1.0
     defusedxml>=0.7.1
-    flake8<4
-    flake8-2020>=1.6.1
-    flake8-bugbear>=22.1.11
-    flake8-comprehensions>=3.7.0
     mypy>=0.940
     pygments
     pylint>=2.13.0
     pytest>=6.2.0
     pytest-darker
-    pytest-flake8>=1.0.6
     pytest-isort>=1.1.0
     pytest-kwparametrize>=0.0.3
     pytest-mypy

From c48343d3c7cf1b185a6694333925104320714cfa Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 18:37:58 +0300
Subject: [PATCH 02/28] Run isort only once on CI

---
 .github/workflows/isort.yml          | 18 ++++++++++++++++++
 .github/workflows/python-package.yml |  6 +++---
 .github/workflows/test-future.yml    |  2 +-
 setup.cfg                            |  1 +
 4 files changed, 23 insertions(+), 4 deletions(-)
 create mode 100644 .github/workflows/isort.yml

diff --git a/.github/workflows/isort.yml b/.github/workflows/isort.yml
new file mode 100644
index 000000000..0f58fcd1f
--- /dev/null
+++ b/.github/workflows/isort.yml
@@ -0,0 +1,18 @@
+---
+name: isort
+
+on: push  # yamllint disable-line rule:truthy
+
+jobs:
+  isort:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v3
+      - run: pip install 'isort>=5.0.1'
+      - uses: Gobot1234/lint-action@v.1.8.2
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          isort: true
+          continue_on_error: false
diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 1cdeee641..3612a80dd 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -38,7 +38,7 @@ jobs:
             --run '
               python -m venv venv
               source venv/bin/activate
-              pip install -e '.[isort,test]'
+              pip install -e '.[test]'
               pytest
             ' \
             ./default.nix
@@ -59,7 +59,7 @@ jobs:
           - '3.9'
           - '3.10'
         constraints: ['']
-        lint: ['--darker --isort']
+        lint: ['--darker']
         include:
           - os: ubuntu-latest
             python-version: '3.7'
@@ -102,7 +102,7 @@ jobs:
         env:
           pip_options: ${{ matrix.upgrade }} ${{ matrix.constraints }}
         run: pip install ${pip_options}
-                 "dist/darker-${{ env.VERSION }}-py3-none-any.whl[isort,test]"
+                 "dist/darker-${{ env.VERSION }}-py3-none-any.whl[test]"
       - name: Run Pytest without Mypy and Pylint if Python < 3.9
         if: env.RUN_MYPY_AND_PYLINT == 'false'
         run: |
diff --git a/.github/workflows/test-future.yml b/.github/workflows/test-future.yml
index 7dae08a7b..472f6b80b 100644
--- a/.github/workflows/test-future.yml
+++ b/.github/workflows/test-future.yml
@@ -27,7 +27,7 @@ jobs:
             --constraint=constraints-future.txt \
             --upgrade \
             --upgrade-strategy=eager \
-            -e '.[isort,test]'
+            -e '.[test]'
       - name: Test with pytest
         run: |
           pytest
diff --git a/setup.cfg b/setup.cfg
index 46a67c176..a3ca25b93 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -55,6 +55,7 @@ test =
     black>=21.7b1  # to prevent Mypy error about `gen_python_files`, see issue #189
     codespell>=2.1.0
     defusedxml>=0.7.1
+    isort>=5.0.1
     mypy>=0.940
     pygments
     pylint>=2.13.0

From 2f3efe09dba1397a798f4d3ddcef985f9a8601db Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 18:37:58 +0300
Subject: [PATCH 03/28] Unique CI job names

---
 .github/workflows/bandit.yml      | 2 +-
 .github/workflows/test-future.yml | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/bandit.yml b/.github/workflows/bandit.yml
index 5479305d7..126939d9c 100644
--- a/.github/workflows/bandit.yml
+++ b/.github/workflows/bandit.yml
@@ -4,7 +4,7 @@ name: Security check - Bandit
 on: push  # yamllint disable-line rule:truthy
 
 jobs:
-  build:
+  bandit:
     runs-on: ubuntu-latest
 
     steps:
diff --git a/.github/workflows/test-future.yml b/.github/workflows/test-future.yml
index 472f6b80b..de64a670a 100644
--- a/.github/workflows/test-future.yml
+++ b/.github/workflows/test-future.yml
@@ -9,7 +9,7 @@ on:  # yamllint disable-line rule:truthy
     - cron: "05 20 * * 6"
 
 jobs:
-  build:
+  test-future:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3

From c9023fefba86822b1f7b04fbdf084d4237ea7cc1 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 18:37:58 +0300
Subject: [PATCH 04/28] No need for deep fetch for YAML lint

---
 .github/workflows/yaml-lint.yml | 2 --
 1 file changed, 2 deletions(-)

diff --git a/.github/workflows/yaml-lint.yml b/.github/workflows/yaml-lint.yml
index abd3fc96b..ba25d1bf3 100644
--- a/.github/workflows/yaml-lint.yml
+++ b/.github/workflows/yaml-lint.yml
@@ -6,7 +6,5 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
       - name: yaml-lint
         uses: ibiqlik/action-yamllint@v3

From 23455b6776f1ed9f33826603f2757bfbf2a2a9b5 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 18:37:58 +0300
Subject: [PATCH 05/28] Update change log

---
 CHANGES.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGES.rst b/CHANGES.rst
index 16e122b6b..050c7cfaf 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -7,6 +7,7 @@ Added
 -----
 - Add a CI workflow which verifies that the ``darker --help`` output in ``README.rst``
   is up to date.
+- Only run ``isort`` and ``flake8`` once in the CI build.
 
 Fixed
 -----

From cd801c6bf462e104f94b1f0d64a14a71a6c47061 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 18:37:58 +0300
Subject: [PATCH 06/28] Run mypy only once in CI

---
 .github/workflows/mypy.yml           | 18 ++++++++++++++++++
 .github/workflows/python-package.yml | 12 ++++++------
 2 files changed, 24 insertions(+), 6 deletions(-)
 create mode 100644 .github/workflows/mypy.yml

diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
new file mode 100644
index 000000000..d9a1bba7f
--- /dev/null
+++ b/.github/workflows/mypy.yml
@@ -0,0 +1,18 @@
+---
+name: mypy
+
+on: push  # yamllint disable-line rule:truthy
+
+jobs:
+  mypy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v3
+      - run: pip install 'mypy>=0.940'
+      - uses: Gobot1234/lint-action@v.1.8.2
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          mypy: true
+          continue_on_error: false
diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 3612a80dd..29943211a 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -69,7 +69,7 @@ jobs:
             constraints: '--constraint constraints-future.txt'
             upgrade: '--upgrade --upgrade-strategy=eager'
     env:
-      RUN_MYPY_AND_PYLINT: >-
+      RUN_PYLINT: >-
         ${{ matrix.python-version == '3.9' || matrix.python-version == '3.10' }}
     steps:
       - uses: actions/checkout@v3
@@ -103,12 +103,12 @@ jobs:
           pip_options: ${{ matrix.upgrade }} ${{ matrix.constraints }}
         run: pip install ${pip_options}
                  "dist/darker-${{ env.VERSION }}-py3-none-any.whl[test]"
-      - name: Run Pytest without Mypy and Pylint if Python < 3.9
-        if: env.RUN_MYPY_AND_PYLINT == 'false'
+      - name: Run Pytest without Pylint if Python < 3.9
+        if: env.RUN_PYLINT == 'false'
         run: |
           pytest ${{ matrix.lint }}
-      - name: Run Pytest with Mypy and Pylint if Python >= 3.9
-        if: env.RUN_MYPY_AND_PYLINT == 'true'
+      - name: Run Pytest with Pylint if Python >= 3.9
+        if: env.RUN_PYLINT == 'true'
         shell: python
         run: |
           import sys
@@ -117,7 +117,7 @@ jobs:
           import toml
 
           data = toml.load("pyproject.toml")
-          data["tool"]["darker"]["lint"] = ["pylint", "mypy"]
+          data["tool"]["darker"]["lint"] = ["pylint"]
           Path("pyproject.toml").write_text(toml.dumps(data))
           pytest_cmd = ["pytest"] + "${{ matrix.lint }}".split()
           retval = run(pytest_cmd).returncode

From a840ffebd6e5eede886f0dd544ef48320869d1a4 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 18:53:14 +0300
Subject: [PATCH 07/28] Switch to upstream lint-action, update to July 11

---
 .github/workflows/mypy.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
index d9a1bba7f..023fe62d4 100644
--- a/.github/workflows/mypy.yml
+++ b/.github/workflows/mypy.yml
@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v3
       - run: pip install 'mypy>=0.940'
-      - uses: Gobot1234/lint-action@v.1.8.2
+      - uses: wearerequired/lint-action@v2.0.1
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           mypy: true

From a8ea634f16df61864c3cd1d3dd2d2cebc5aca22b Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 19:02:33 +0300
Subject: [PATCH 08/28] Run Mypy only for `src/`

---
 .github/workflows/mypy.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
index 023fe62d4..1fd1f7348 100644
--- a/.github/workflows/mypy.yml
+++ b/.github/workflows/mypy.yml
@@ -15,4 +15,5 @@ jobs:
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           mypy: true
+          mypy_args: "src"
           continue_on_error: false

From eb0870994213fd9b5fba90aeb8138b0bb65272f2 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 19:05:26 +0300
Subject: [PATCH 09/28] Specify configuration file explicitly

---
 .github/workflows/mypy.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
index 1fd1f7348..91a1ce6f7 100644
--- a/.github/workflows/mypy.yml
+++ b/.github/workflows/mypy.yml
@@ -15,5 +15,5 @@ jobs:
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           mypy: true
-          mypy_args: "src"
+          mypy_args: "--config-file=mypy.ini src"
           continue_on_error: false

From f368e806e2d2073aab80baeff6b79e02a65de251 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 19:31:05 +0300
Subject: [PATCH 10/28] Install some deps for mypy. More specific ignore.

---
 .github/workflows/mypy.yml   | 4 ++--
 src/darker/help.py           | 2 +-
 src/darker/import_sorting.py | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
index 91a1ce6f7..758b4b00c 100644
--- a/.github/workflows/mypy.yml
+++ b/.github/workflows/mypy.yml
@@ -10,10 +10,10 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v3
-      - run: pip install 'mypy>=0.940'
+      - run: pip install -U isort mypy pytest types-toml
       - uses: wearerequired/lint-action@v2.0.1
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           mypy: true
-          mypy_args: "--config-file=mypy.ini src"
+          mypy_args: "src"
           continue_on_error: false
diff --git a/src/darker/help.py b/src/darker/help.py
index d5b04f470..411f280b0 100644
--- a/src/darker/help.py
+++ b/src/darker/help.py
@@ -11,7 +11,7 @@
 try:
     import isort
 except ImportError:
-    isort = None  # type: ignore
+    isort = None  # type: ignore[assignment]
     DESCRIPTION_PARTS.extend(
         ["\n", "\n", f"{ISORT_INSTRUCTION} to enable sorting of import definitions"]
     )
diff --git a/src/darker/import_sorting.py b/src/darker/import_sorting.py
index 1174d96f4..4f7344cb0 100644
--- a/src/darker/import_sorting.py
+++ b/src/darker/import_sorting.py
@@ -33,7 +33,7 @@ def isort_code(*args: Any, **kwargs: Any) -> str:  # type: ignore[misc]
             )
 except ImportError:
     # `isort` is an optional dependency. Prevent the `ImportError` if it's missing.
-    isort = None  # type: ignore
+    isort = None  # type: ignore[assignment]
 
     def isort_code(*args: Any, **kwargs: Any) -> str:  # type: ignore[misc]
         """Fake `isort.code()` function to use when `isort` isn't installed"""

From 6334127ad9e01cebceab1cbc887cc59f69e31835 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 19:37:48 +0300
Subject: [PATCH 11/28] Pytest-flake8, -isort & -mypy not needed

---
 constraints-oldest.txt | 2 --
 setup.cfg              | 2 --
 2 files changed, 4 deletions(-)

diff --git a/constraints-oldest.txt b/constraints-oldest.txt
index 90ea502c9..b497b73ce 100644
--- a/constraints-oldest.txt
+++ b/constraints-oldest.txt
@@ -15,8 +15,6 @@ mypy==0.940
 Pygments==2.4.0
 pylint==2.13.0
 pytest==6.2.0
-pytest-flake8==1.0.6
-pytest-isort==1.1.0
 pytest-kwparametrize==0.0.3
 pyupgrade==2.31.0
 regex==2021.4.4
diff --git a/setup.cfg b/setup.cfg
index a3ca25b93..9ecf7d1f2 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -61,9 +61,7 @@ test =
     pylint>=2.13.0
     pytest>=6.2.0
     pytest-darker
-    pytest-isort>=1.1.0
     pytest-kwparametrize>=0.0.3
-    pytest-mypy
     pyupgrade>=2.31.0
     regex>=2021.4.4
     requests_cache>=0.7

From c10b6a9a5ce75fcb9cccb872fbad037496a86fd6 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 19:40:10 +0300
Subject: [PATCH 12/28] Remove `bandit` dep, being run in its own workflow

---
 constraints-oldest.txt | 1 -
 setup.cfg              | 1 -
 2 files changed, 2 deletions(-)

diff --git a/constraints-oldest.txt b/constraints-oldest.txt
index b497b73ce..080431eb2 100644
--- a/constraints-oldest.txt
+++ b/constraints-oldest.txt
@@ -4,7 +4,6 @@
 # interpreter and Python ependencies. Keep this up-to-date with minimum
 # versions in `setup.cfg`.
 airium==0.2.3
-bandit==1.7.1
 black==21.8b0
 codespell==2.1.0
 defusedxml==0.7.1
diff --git a/setup.cfg b/setup.cfg
index 9ecf7d1f2..f336b80d4 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -51,7 +51,6 @@ color =
 test =
     # NOTE: remember to keep `constraints-oldest.txt` in sync with these
     airium>=0.2.3
-    bandit>=1.7.1
     black>=21.7b1  # to prevent Mypy error about `gen_python_files`, see issue #189
     codespell>=2.1.0
     defusedxml>=0.7.1

From 8f616819b1057cfc8d0e70a7694969f05330a20a Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 19:46:14 +0300
Subject: [PATCH 13/28] Add codespell workflow

---
 .github/workflows/codespell.yml | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 .github/workflows/codespell.yml

diff --git a/.github/workflows/codespell.yml b/.github/workflows/codespell.yml
new file mode 100644
index 000000000..08eb7a51b
--- /dev/null
+++ b/.github/workflows/codespell.yml
@@ -0,0 +1,15 @@
+---
+name: codespell
+
+on: push  # yamllint disable-line rule:truthy
+
+jobs:
+  codespell:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: codespell-project/actions-codespell@master
+        with:
+          ignore_words_list: nd
+          skip: .git,*.json

From c74551fabaf59191f36b5c46d34373ac59cb8048 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 19:48:10 +0300
Subject: [PATCH 14/28] Test if `actions-codespell` reads setup.cfg

---
 .github/workflows/codespell.yml | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/.github/workflows/codespell.yml b/.github/workflows/codespell.yml
index 08eb7a51b..6a5bbf0fe 100644
--- a/.github/workflows/codespell.yml
+++ b/.github/workflows/codespell.yml
@@ -10,6 +10,3 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: codespell-project/actions-codespell@master
-        with:
-          ignore_words_list: nd
-          skip: .git,*.json

From 88590c6a20e6ae715812478b75236287f1bffba3 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 19:50:52 +0300
Subject: [PATCH 15/28] Clean up old codespell related items

---
 .github/workflows/python-package.yml | 2 --
 constraints-oldest.txt               | 1 -
 setup.cfg                            | 1 -
 3 files changed, 4 deletions(-)

diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 29943211a..cc7725901 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -123,8 +123,6 @@ jobs:
           retval = run(pytest_cmd).returncode
           run(["git", "restore", "pyproject.toml"])
           sys.exit(retval)
-      - name: Check English spelling in the code base using codespell
-        run: codespell
       - name: Ensure modern Python style using pyupgrade
         # This script is written in a Linux / macos / windows portable way
         run: |
diff --git a/constraints-oldest.txt b/constraints-oldest.txt
index 080431eb2..f49b41591 100644
--- a/constraints-oldest.txt
+++ b/constraints-oldest.txt
@@ -5,7 +5,6 @@
 # versions in `setup.cfg`.
 airium==0.2.3
 black==21.8b0
-codespell==2.1.0
 defusedxml==0.7.1
 flake8-2020==1.6.1
 flake8-bugbear==22.1.11
diff --git a/setup.cfg b/setup.cfg
index f336b80d4..ece83077b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -52,7 +52,6 @@ test =
     # NOTE: remember to keep `constraints-oldest.txt` in sync with these
     airium>=0.2.3
     black>=21.7b1  # to prevent Mypy error about `gen_python_files`, see issue #189
-    codespell>=2.1.0
     defusedxml>=0.7.1
     isort>=5.0.1
     mypy>=0.940

From 860ba1f5c6dd800d52581fa30a6383bb9c763ba1 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 20:10:17 +0300
Subject: [PATCH 16/28] Add separate `pyupgrade` workflow

---
 .github/workflows/pyupgrade.yml | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 .github/workflows/pyupgrade.yml

diff --git a/.github/workflows/pyupgrade.yml b/.github/workflows/pyupgrade.yml
new file mode 100644
index 000000000..408f4094f
--- /dev/null
+++ b/.github/workflows/pyupgrade.yml
@@ -0,0 +1,23 @@
+---
+name: pyupgrade
+
+on: push  # yamllint disable-line rule:truthy
+
+jobs:
+  pyupgrade:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v3
+      - run: pip install pyupgrade
+      - name: Ensure modern Python style using pyupgrade
+        # This script is written in a Linux / macos / windows portable way
+        run: |
+          python -c "
+          import sys
+          from pyupgrade._main import main
+          from glob import glob
+          files = glob('**/*.py', recursive=True)
+          sys.exit(main(files + ['--py37-plus']))
+          " || ( git diff ; false )

From be2da2b04412c1bad5f93b8a5c179828a6300228 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 20:11:40 +0300
Subject: [PATCH 17/28] Follow a pyupgrade recommenadtion

---
 src/darker/tests/test_git.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/darker/tests/test_git.py b/src/darker/tests/test_git.py
index d0ad478c3..112b2d661 100644
--- a/src/darker/tests/test_git.py
+++ b/src/darker/tests/test_git.py
@@ -422,7 +422,7 @@ def encodings_repo(tmp_path_factory):
     git_repo.add({"file.py": content}, commit="iso-8859-1")
     git_repo.create_tag("iso-8859-1")
     # Commit with a utf-8 encoding cookie
-    content = "# coding: utf-8\npython = 'パイソン'\n".encode("utf-8")
+    content = "# coding: utf-8\npython = 'パイソン'\n".encode()
     git_repo.add({"file.py": content}, commit="utf-8")
     git_repo.create_tag("utf-8")
     # Current worktree content (not committed) with a shitfjs encoding cookie

From f4e0e21263b257cb9139cad4f4fa0b74eaaabdb3 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 20:11:50 +0300
Subject: [PATCH 18/28] Remove old pyupgrade items

---
 .github/workflows/python-package.yml | 9 ---------
 constraints-oldest.txt               | 1 -
 setup.cfg                            | 1 -
 3 files changed, 11 deletions(-)

diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index cc7725901..9d867298f 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -123,14 +123,5 @@ jobs:
           retval = run(pytest_cmd).returncode
           run(["git", "restore", "pyproject.toml"])
           sys.exit(retval)
-      - name: Ensure modern Python style using pyupgrade
-        # This script is written in a Linux / macos / windows portable way
-        run: |
-          python -c "
-          from pyupgrade._main import main
-          from glob import glob
-          files = glob('**/*.py', recursive=True)
-          main(files + ['--py37-plus'])
-          "
       - name: Check dependencies for known security vulterabilities using Safety
         run: safety check
diff --git a/constraints-oldest.txt b/constraints-oldest.txt
index f49b41591..158d1d6dc 100644
--- a/constraints-oldest.txt
+++ b/constraints-oldest.txt
@@ -14,7 +14,6 @@ Pygments==2.4.0
 pylint==2.13.0
 pytest==6.2.0
 pytest-kwparametrize==0.0.3
-pyupgrade==2.31.0
 regex==2021.4.4
 requests_cache==0.7
 ruamel.yaml==0.17.21
diff --git a/setup.cfg b/setup.cfg
index ece83077b..b781ab241 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -60,7 +60,6 @@ test =
     pytest>=6.2.0
     pytest-darker
     pytest-kwparametrize>=0.0.3
-    pyupgrade>=2.31.0
     regex>=2021.4.4
     requests_cache>=0.7
     ruamel.yaml>=0.17.21

From 0920bd44bc58fe59913085a3bbeaac6451fe186b Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 20:17:06 +0300
Subject: [PATCH 19/28] Run Safety as its own workflow

---
 .github/workflows/safety.yml | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 .github/workflows/safety.yml

diff --git a/.github/workflows/safety.yml b/.github/workflows/safety.yml
new file mode 100644
index 000000000..e2307455e
--- /dev/null
+++ b/.github/workflows/safety.yml
@@ -0,0 +1,15 @@
+---
+name: safety
+
+on: push  # yamllint disable-line rule:truthy
+
+jobs:
+  safety:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v3
+      - run: pip install -U safety
+      - name: Check dependencies for known security vulterabilities using Safety
+        run: safety check

From 1205cd64e105cda87776c8387c9bbbb63f0a2c15 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 20:19:36 +0300
Subject: [PATCH 20/28] Remove old traces of running Safety

---
 .github/workflows/python-package.yml | 2 --
 constraints-oldest.txt               | 1 -
 setup.cfg                            | 1 -
 3 files changed, 4 deletions(-)

diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 9d867298f..1659844c0 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -123,5 +123,3 @@ jobs:
           retval = run(pytest_cmd).returncode
           run(["git", "restore", "pyproject.toml"])
           sys.exit(retval)
-      - name: Check dependencies for known security vulterabilities using Safety
-        run: safety check
diff --git a/constraints-oldest.txt b/constraints-oldest.txt
index 158d1d6dc..518ca7479 100644
--- a/constraints-oldest.txt
+++ b/constraints-oldest.txt
@@ -17,7 +17,6 @@ pytest-kwparametrize==0.0.3
 regex==2021.4.4
 requests_cache==0.7
 ruamel.yaml==0.17.21
-safety==1.10.3
 toml==0.10.0
 twine==2.0.0
 types-toml==0.10.4
diff --git a/setup.cfg b/setup.cfg
index b781ab241..7a3be8c2d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -63,7 +63,6 @@ test =
     regex>=2021.4.4
     requests_cache>=0.7
     ruamel.yaml>=0.17.21
-    safety>=1.10.3
     twine>=2.0.0
     types-requests>=2.27.9
     types-toml>=0.10.4

From 63f5e1d79745c9a96e4148bd49bd1e8e794eac3a Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 20:35:27 +0300
Subject: [PATCH 21/28] Run Pylint in a separate workflow

---
 .github/workflows/pylint.yml | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 .github/workflows/pylint.yml

diff --git a/.github/workflows/pylint.yml b/.github/workflows/pylint.yml
new file mode 100644
index 000000000..2e4419f24
--- /dev/null
+++ b/.github/workflows/pylint.yml
@@ -0,0 +1,18 @@
+---
+name: pylint
+
+on: push  # yamllint disable-line rule:truthy
+
+jobs:
+  pylint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v3
+      - run: pip install pylint
+      - uses: wearerequired/lint-action@v2.0.1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          pylint: true
+          continue_on_error: false

From 47194465a109a6d7f6c02446db1bd56b2531aeb0 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 20:42:06 +0300
Subject: [PATCH 22/28] Remove old traces of running Pylint

---
 .github/workflows/python-package.yml | 25 ++-----------------------
 constraints-oldest.txt               |  1 -
 pyproject.toml                       |  3 ---
 setup.cfg                            |  1 -
 4 files changed, 2 insertions(+), 28 deletions(-)

diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 1659844c0..a2ff05034 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -59,7 +59,6 @@ jobs:
           - '3.9'
           - '3.10'
         constraints: ['']
-        lint: ['--darker']
         include:
           - os: ubuntu-latest
             python-version: '3.7'
@@ -68,9 +67,6 @@ jobs:
             python-version: '3.10'
             constraints: '--constraint constraints-future.txt'
             upgrade: '--upgrade --upgrade-strategy=eager'
-    env:
-      RUN_PYLINT: >-
-        ${{ matrix.python-version == '3.9' || matrix.python-version == '3.10' }}
     steps:
       - uses: actions/checkout@v3
         with:
@@ -103,23 +99,6 @@ jobs:
           pip_options: ${{ matrix.upgrade }} ${{ matrix.constraints }}
         run: pip install ${pip_options}
                  "dist/darker-${{ env.VERSION }}-py3-none-any.whl[test]"
-      - name: Run Pytest without Pylint if Python < 3.9
-        if: env.RUN_PYLINT == 'false'
+      - name: Run Pytest
         run: |
-          pytest ${{ matrix.lint }}
-      - name: Run Pytest with Pylint if Python >= 3.9
-        if: env.RUN_PYLINT == 'true'
-        shell: python
-        run: |
-          import sys
-          from pathlib import Path
-          from subprocess import run
-          import toml
-
-          data = toml.load("pyproject.toml")
-          data["tool"]["darker"]["lint"] = ["pylint"]
-          Path("pyproject.toml").write_text(toml.dumps(data))
-          pytest_cmd = ["pytest"] + "${{ matrix.lint }}".split()
-          retval = run(pytest_cmd).returncode
-          run(["git", "restore", "pyproject.toml"])
-          sys.exit(retval)
+          pytest --darker
diff --git a/constraints-oldest.txt b/constraints-oldest.txt
index 518ca7479..48aa296a2 100644
--- a/constraints-oldest.txt
+++ b/constraints-oldest.txt
@@ -11,7 +11,6 @@ flake8-bugbear==22.1.11
 flake8-comprehensions==3.7.0
 mypy==0.940
 Pygments==2.4.0
-pylint==2.13.0
 pytest==6.2.0
 pytest-kwparametrize==0.0.3
 regex==2021.4.4
diff --git a/pyproject.toml b/pyproject.toml
index 23d5b00af..5e49fb85a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,6 +15,3 @@ src = [
     "src",
 ]
 revision = "origin/master..."
-# The empty linter list is here so `.github/workflows/python-package.yml` can
-# add Pylint in certain run configurations:
-lint = []
diff --git a/setup.cfg b/setup.cfg
index 7a3be8c2d..3198bc0f9 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -56,7 +56,6 @@ test =
     isort>=5.0.1
     mypy>=0.940
     pygments
-    pylint>=2.13.0
     pytest>=6.2.0
     pytest-darker
     pytest-kwparametrize>=0.0.3

From c93aabc430676771941c1a0639f9b10ee0ba83fa Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 21:32:02 +0300
Subject: [PATCH 23/28] Build Darker distributions only one

Use artifact upload/download to share them between jobs
---
 .github/workflows/python-package.yml | 75 ++++++++++++++++++----------
 1 file changed, 49 insertions(+), 26 deletions(-)

diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index a2ff05034..e81432a0b 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -12,6 +12,42 @@ on:  # yamllint disable-line rule:truthy
 
 jobs:
 
+  build:
+    runs-on: ubuntu-latest
+    outputs:
+      darker-wheel-path: ${{ steps.get-darker-version.outputs.wheel-path }}
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-python@v3
+      - name: Upgrade pip, install wheel and twine
+        run: |
+          # strict dependency resolution added in pip 20.3
+          python -m pip install --upgrade 'pip>=20.3' wheel twine
+      - name: Build source distribution
+        run: python setup.py sdist
+      - name: Build wheel distribution
+        run: python setup.py bdist_wheel
+      - name: Validate distributions
+        run: twine check dist/*
+      - name: Upload distributions for test jobs
+        uses: actions/upload-artifact@v3
+        with:
+          name: dist
+          path: dist/
+          if-no-files-found: error
+      - name: Find out Darker version and output it for test jobs
+        id: get-darker-version
+        shell: python
+        run: |
+          from runpy import run_path
+          version = run_path("src/darker/version.py")["__version__"]
+          print(
+              "::set-output name=wheel-path::"
+              f"dist/darker-{version}-py3-none-any.whl"
+          )
+
   test-nixos:
     runs-on: ${{ matrix.os }}
     strategy:
@@ -23,13 +59,15 @@ jobs:
           - os: macos-latest
             python-version: python39
             # see https://github.com/cachix/install-nix-action/issues/135
+    needs:
+      - build
     steps:
       - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
       - uses: cachix/install-nix-action@v17
         with:
           nix_path: nixpkgs=channel:nixos-21.11
+      - name: Download distributions made by the build job
+        uses: actions/download-artifact@v3
       - name: Run tests in nix-shell
         run: |
           nix-shell \
@@ -38,13 +76,12 @@ jobs:
             --run '
               python -m venv venv
               source venv/bin/activate
-              pip install -e '.[test]'
+              pip install "${{needs.build.outputs.darker-wheel-path}}[test]"
               pytest
             ' \
             ./default.nix
 
-  build:
-
+  test:
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -67,38 +104,24 @@ jobs:
             python-version: '3.10'
             constraints: '--constraint constraints-future.txt'
             upgrade: '--upgrade --upgrade-strategy=eager'
+    needs:
+      - build
     steps:
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0
-
+          # need full history since Pytest runs Darker itself below
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python-version }}
-      - name: Upgrade pip, install wheel and twine
-        run: |
-          # strict dependency resolution added in pip 20.3
-          python -m pip install --upgrade 'pip>=20.3' wheel twine
-      - name: Build source distribution
-        run: python setup.py sdist
-      - name: Build wheel distribution
-        run: python setup.py bdist_wheel
-      - name: Validate distributions
-        run: twine check dist/*
-      - name: Get Darker version
-        shell: python
-        run: |
-          from os import environ
-          from pathlib import Path
-          from runpy import run_path
-          version = run_path("src/darker/version.py")["__version__"]
-          Path(environ["GITHUB_ENV"]).write_text(f"VERSION={version}\n")
-      - name: Install Darker and its dependencies
+      - name: Download distributions made by the build job
+        uses: actions/download-artifact@v3
+      - name: Install Darker and its dependencies from the wheel build earlier
         env:
           pip_options: ${{ matrix.upgrade }} ${{ matrix.constraints }}
         run: pip install ${pip_options}
-                 "dist/darker-${{ env.VERSION }}-py3-none-any.whl[test]"
+                 "${{needs.build.outputs.darker-wheel-path}}[test]"
       - name: Run Pytest
         run: |
           pytest --darker

From 0f9426c3f8edf182f68e37a584cda59e258c618a Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 21:45:25 +0300
Subject: [PATCH 24/28] Separate sdist build and dist validation job

---
 .github/workflows/python-package.yml | 48 ++++++++++++++++------------
 1 file changed, 28 insertions(+), 20 deletions(-)

diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index e81432a0b..bf7bda87e 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -1,5 +1,5 @@
 ---
-name: build
+name: Build and test
 
 on:  # yamllint disable-line rule:truthy
   push:
@@ -12,26 +12,18 @@ on:  # yamllint disable-line rule:truthy
 
 jobs:
 
-  build:
+  build-wheel:
     runs-on: ubuntu-latest
     outputs:
-      darker-wheel-path: ${{ steps.get-darker-version.outputs.wheel-path }}
+      wheel-path: ${{ steps.get-darker-version.outputs.wheel-path }}
     steps:
       - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
       - uses: actions/setup-python@v3
-      - name: Upgrade pip, install wheel and twine
-        run: |
-          # strict dependency resolution added in pip 20.3
-          python -m pip install --upgrade 'pip>=20.3' wheel twine
-      - name: Build source distribution
-        run: python setup.py sdist
+      - name: Install wheel
+        run: python -m pip install wheel
       - name: Build wheel distribution
         run: python setup.py bdist_wheel
-      - name: Validate distributions
-        run: twine check dist/*
-      - name: Upload distributions for test jobs
+      - name: Upload wheel for other jobs
         uses: actions/upload-artifact@v3
         with:
           name: dist
@@ -60,13 +52,13 @@ jobs:
             python-version: python39
             # see https://github.com/cachix/install-nix-action/issues/135
     needs:
-      - build
+      - build-wheel
     steps:
       - uses: actions/checkout@v3
       - uses: cachix/install-nix-action@v17
         with:
           nix_path: nixpkgs=channel:nixos-21.11
-      - name: Download distributions made by the build job
+      - name: Download wheel uploaded by the build-wheel job
         uses: actions/download-artifact@v3
       - name: Run tests in nix-shell
         run: |
@@ -76,7 +68,7 @@ jobs:
             --run '
               python -m venv venv
               source venv/bin/activate
-              pip install "${{needs.build.outputs.darker-wheel-path}}[test]"
+              pip install "${{needs.build-wheel.outputs.wheel-path}}[test]"
               pytest
             ' \
             ./default.nix
@@ -105,7 +97,7 @@ jobs:
             constraints: '--constraint constraints-future.txt'
             upgrade: '--upgrade --upgrade-strategy=eager'
     needs:
-      - build
+      - build-wheel
     steps:
       - uses: actions/checkout@v3
         with:
@@ -115,13 +107,29 @@ jobs:
         uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python-version }}
-      - name: Download distributions made by the build job
+      - name: Download wheel uploaded by the build-wheel job
         uses: actions/download-artifact@v3
       - name: Install Darker and its dependencies from the wheel build earlier
         env:
           pip_options: ${{ matrix.upgrade }} ${{ matrix.constraints }}
         run: pip install ${pip_options}
-                 "${{needs.build.outputs.darker-wheel-path}}[test]"
+                 "${{needs.build-wheel.outputs.wheel-path}}[test]"
       - name: Run Pytest
         run: |
           pytest --darker
+
+  build-sdist-validate-dists:
+    runs-on: ubuntu-latest
+    needs:
+      - build-wheel
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v3
+      - name: Install twine
+        run: python -m pip install twine
+      - name: Download wheel uploaded by the build-wheel job
+        uses: actions/download-artifact@v3
+      - name: Build source distribution
+        run: python setup.py sdist
+      - name: Validate distributions
+        run: twine check dist/*

From ede1f34b38bdd49aa77b1133325d3a550d607579 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 22:01:05 +0300
Subject: [PATCH 25/28] Update isort lint-action

---
 .github/workflows/isort.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/isort.yml b/.github/workflows/isort.yml
index 0f58fcd1f..241a17507 100644
--- a/.github/workflows/isort.yml
+++ b/.github/workflows/isort.yml
@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v3
       - run: pip install 'isort>=5.0.1'
-      - uses: Gobot1234/lint-action@v.1.8.2
+      - uses: wearerequired/lint-action@v2.0.1
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           isort: true

From 0b566687e88c19aa3f70284f5e535f18119e84fb Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 22:02:52 +0300
Subject: [PATCH 26/28] Typo in `safety.yml`

---
 .github/workflows/safety.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/safety.yml b/.github/workflows/safety.yml
index e2307455e..da8b8ecc8 100644
--- a/.github/workflows/safety.yml
+++ b/.github/workflows/safety.yml
@@ -11,5 +11,5 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v3
       - run: pip install -U safety
-      - name: Check dependencies for known security vulterabilities using Safety
+      - name: Check dependencies for known security vulnerabilities using Safety
         run: safety check

From 678b36e295f9f26d5ebfa54efa1582a85931767a Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 22:05:28 +0300
Subject: [PATCH 27/28] Update change log

---
 CHANGES.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CHANGES.rst b/CHANGES.rst
index 050c7cfaf..5c36d3d75 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -7,7 +7,7 @@ Added
 -----
 - Add a CI workflow which verifies that the ``darker --help`` output in ``README.rst``
   is up to date.
-- Only run ``isort`` and ``flake8`` once in the CI build.
+- Only run linters, security checks and package builds once in the CI build.
 
 Fixed
 -----

From 74eb9aea1f6428cb959c7162ccc772e2356a96c8 Mon Sep 17 00:00:00 2001
From: Antti Kaihola <13725+akaihola@users.noreply.github.com>
Date: Sun, 28 Aug 2022 22:06:50 +0300
Subject: [PATCH 28/28] Remove `mypy` from dependencies

---
 constraints-oldest.txt | 1 -
 setup.cfg              | 1 -
 2 files changed, 2 deletions(-)

diff --git a/constraints-oldest.txt b/constraints-oldest.txt
index 48aa296a2..b639e274e 100644
--- a/constraints-oldest.txt
+++ b/constraints-oldest.txt
@@ -9,7 +9,6 @@ defusedxml==0.7.1
 flake8-2020==1.6.1
 flake8-bugbear==22.1.11
 flake8-comprehensions==3.7.0
-mypy==0.940
 Pygments==2.4.0
 pytest==6.2.0
 pytest-kwparametrize==0.0.3
diff --git a/setup.cfg b/setup.cfg
index 3198bc0f9..b4b4c5b63 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -54,7 +54,6 @@ test =
     black>=21.7b1  # to prevent Mypy error about `gen_python_files`, see issue #189
     defusedxml>=0.7.1
     isort>=5.0.1
-    mypy>=0.940
     pygments
     pytest>=6.2.0
     pytest-darker