diff --git a/.github/workflows/github-ci.yaml b/.github/workflows/github-ci.yaml
index 9c89fe9e0..738a95d9c 100644
--- a/.github/workflows/github-ci.yaml
+++ b/.github/workflows/github-ci.yaml
@@ -69,9 +69,6 @@ jobs:
     - name: Install pypdf
       run: |
         pip install .
-    - name: Test with flake8
-      run: |
-        flake8 .
     - name: Test with pytest
       run: |
         python -m coverage run --parallel-mode -m pytest tests -vv
@@ -85,6 +82,39 @@ jobs:
         path: .coverage.*
         if-no-files-found: ignore
 
+  codestyle:
+    name: Check code style issues
+    runs-on: ubuntu-20.04
+    steps:
+    - name: Checkout Code
+      uses: actions/checkout@v3
+      with:
+        submodules: 'recursive'
+    - name: Cache Downloaded Files
+      id: cache-downloaded-files
+      uses: actions/cache@v3
+      with:
+        path: '**/tests/pdf_cache/*'
+        key: cache-downloaded-files
+    - name: Setup Python 3.11
+      uses: actions/setup-python@v4
+      with:
+        python-version: "3.11"
+        cache: 'pip'
+        cache-dependency-path: '**/requirements/ci-3.11.txt'
+    - name: Upgrade pip
+      run: |
+        python -m pip install --upgrade pip
+    - name: Install requirements
+      run: |
+        pip install -r requirements/ci-3.11.txt
+    - name: Install pypdf
+      run: |
+        pip install .
+    - name: Test with flake8
+      run: |
+        flake8 .
+
   package:
     name: Build & verify package
     runs-on: ubuntu-latest
@@ -140,7 +170,7 @@ jobs:
           python -m coverage combine
           python -m coverage xml
       - name: Upload Coverage to Codecov
-        uses: codecov/codecov-action@v2
+        uses: codecov/codecov-action@v3
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ./coverage.xml
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 8ae3040ef..4da54ab3c 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -17,11 +17,6 @@ repos:
         exclude: "docs/make.bat"
     -   id: check-added-large-files
         args: ['--maxkb=1000']
--   repo: https://github.com/pycqa/flake8
-    rev: 6.0.0
-    hooks:
-    -   id: flake8
-        args: ["--ignore", "E,W,F"]
 # -   repo: https://github.com/pre-commit/mirrors-mypy
 #     rev: v0.942
 #     hooks:
@@ -43,8 +38,18 @@ repos:
     -   id: blacken-docs
         additional_dependencies: [black==22.1.0]
         exclude: "docs/user/robustness.md"
+-   repo: https://github.com/charliermarsh/ruff-pre-commit
+    # Ruff version.
+    rev: 'v0.0.237'
+    hooks:
+    -   id: ruff
 -   repo: https://github.com/asottile/pyupgrade
     rev: v3.3.1
     hooks:
     -   id: pyupgrade
         args: [--py36-plus]
+-   repo: https://github.com/pycqa/flake8
+    rev: 6.0.0
+    hooks:
+    -   id: flake8
+        args: ["--ignore", "E,W,F"]
diff --git a/pypdf/_cmap.py b/pypdf/_cmap.py
index 1b2bae373..f74faa19d 100644
--- a/pypdf/_cmap.py
+++ b/pypdf/_cmap.py
@@ -344,8 +344,8 @@ def parse_bfrange(
     return None if closure_found else (a, b)
 
 
-def parse_bfchar(l: bytes, map_dict: Dict[Any, Any], int_entry: List[int]) -> None:
-    lst = [x for x in l.split(b" ") if x]
+def parse_bfchar(line: bytes, map_dict: Dict[Any, Any], int_entry: List[int]) -> None:
+    lst = [x for x in line.split(b" ") if x]
     map_dict[-1] = len(lst[0]) // 2
     while len(lst) > 1:
         map_to = ""
diff --git a/pypdf/_writer.py b/pypdf/_writer.py
index 965db269c..adc70e257 100644
--- a/pypdf/_writer.py
+++ b/pypdf/_writer.py
@@ -1031,7 +1031,7 @@ def encrypt(
             rev = 2
             keylen = int(40 / 8)
         P = permissions_flag
-        O = ByteStringObject(_alg33(owner_password, user_password, rev, keylen))  # type: ignore[arg-type]
+        O = ByteStringObject(_alg33(owner_password, user_password, rev, keylen))  # type: ignore[arg-type]  # noqa
         ID_1 = ByteStringObject(md5((repr(time.time())).encode("utf8")).digest())
         ID_2 = ByteStringObject(md5((repr(random.random())).encode("utf8")).digest())
         self._ID = ArrayObject((ID_1, ID_2))
diff --git a/pypdf/constants.py b/pypdf/constants.py
index 0ac40d08a..9ecdf0e82 100644
--- a/pypdf/constants.py
+++ b/pypdf/constants.py
@@ -43,7 +43,7 @@ class EncryptionDictAttributes:
     """
 
     R = "/R"  # number, required; revision of the standard security handler
-    O = "/O"  # 32-byte string, required
+    O = "/O"  # 32-byte string, required  # noqa
     U = "/U"  # 32-byte string, required
     P = "/P"  # integer flag, required; permitted operations
     ENCRYPT_METADATA = "/EncryptMetadata"  # boolean flag, optional