diff --git a/.github/workflows/cicd.yml b/.github/workflows/cicd.yml
index 0dbee5a..c938ac8 100644
--- a/.github/workflows/cicd.yml
+++ b/.github/workflows/cicd.yml
@@ -20,8 +20,8 @@ jobs:
       - run: pip install -U pip poetry
       - run: poetry config virtualenvs.create false
       - run: poetry install
-      - run: flake8 --max-line-length 88 src/ tests/
-      - run: black --diff --check src/ tests/
+      - run: ruff check src/ tests/
+      - run: ruff format --diff --check src/ tests/
       - run: mypy src/ tests/
       - run: pytest
 
diff --git a/examples/naval.py b/examples/naval.py
index 1410654..3694d8f 100644
--- a/examples/naval.py
+++ b/examples/naval.py
@@ -31,7 +31,7 @@ def ship_new(name):
 @click.option("--speed", metavar="KN", default=10, help="Speed in knots.")
 def ship_move(ship, x, y, speed):
     """Moves SHIP to the new location X,Y."""
-    click.echo("Moving ship %s to %s,%s with speed %s" % (ship, x, y, speed))
+    click.echo(f"Moving ship {ship} to {x},{y} with speed {speed}")
 
 
 @ship.command("shoot")
@@ -40,7 +40,7 @@ def ship_move(ship, x, y, speed):
 @click.argument("y", type=float)
 def ship_shoot(ship, x, y):
     """Makes SHIP fire to X,Y."""
-    click.echo("Ship %s fires to %s,%s" % (ship, x, y))
+    click.echo(f"Ship {ship} fires to {x},{y}")
 
 
 @cli.group("mine", cls=DYMGroup)
@@ -61,7 +61,7 @@ def mine():
 @click.option("ty", "--drifting", flag_value="drifting", help="Drifting mine.")
 def mine_set(x, y, ty):
     """Sets a mine at a specific coordinate."""
-    click.echo("Set %s mine at %s,%s" % (ty, x, y))
+    click.echo(f"Set {ty} mine at {x},{y}")
 
 
 @mine.command("remove")
@@ -69,7 +69,7 @@ def mine_set(x, y, ty):
 @click.argument("y", type=float)
 def mine_remove(x, y):
     """Removes a mine at a specific coordinate."""
-    click.echo("Removed mine at %s,%s" % (x, y))
+    click.echo(f"Removed mine at {x},{y}")
 
 
 if __name__ == "__main__":
diff --git a/pyproject.toml b/pyproject.toml
index 163abb2..ae57c79 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,10 +14,23 @@ click = ">=7"
 
 [tool.poetry.dev-dependencies]
 pytest = "^6.2.5"
-black = "^24.3.0"
-isort = "^5.9.3"
-flake8 = {version = "^7.0.0", python = ">=3.8.1"}
 mypy = "^0.910"
+ruff = "0.3.4"
+
+[tool.ruff]
+src = ["src"]
+target-version = "py38"
+
+[tool.ruff.lint]
+select = ["ALL"]
+ignore = ["ANN101", "COM812", "D", "FA", "ISC001"]
+
+[tool.ruff.lint.flake8-type-checking]
+strict = true
+
+[tool.ruff.lint.per-file-ignores]
+"examples/**" = ["ANN", "D", "INP001"]
+"tests/**" = ["ANN", "D", "INP001", "S101"]
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]
diff --git a/src/click_didyoumean/__init__.py b/src/click_didyoumean/__init__.py
index 15e01cb..f736a59 100644
--- a/src/click_didyoumean/__init__.py
+++ b/src/click_didyoumean/__init__.py
@@ -16,10 +16,10 @@ class DYMMixin:
     a certain command is not registered.
     """
 
-    def __init__(self, *args: typing.Any, **kwargs: typing.Any) -> None:
+    def __init__(self, *args: typing.Any, **kwargs: typing.Any) -> None:  # noqa: ANN401
         self.max_suggestions = kwargs.pop("max_suggestions", 3)
         self.cutoff = kwargs.pop("cutoff", 0.5)
-        super().__init__(*args, **kwargs)  # type: ignore
+        super().__init__(*args, **kwargs)  # type: ignore[call-arg]
 
     def resolve_command(
         self, ctx: click.Context, args: typing.List[str]
@@ -32,13 +32,13 @@ def resolve_command(
         to the raised exception message.
         """
         try:
-            return super(DYMMixin, self).resolve_command(ctx, args)  # type: ignore
+            return super().resolve_command(ctx, args)  # type: ignore[misc]
         except click.exceptions.UsageError as error:
             error_msg = str(error)
             original_cmd_name = click.utils.make_str(args[0])
             matches = difflib.get_close_matches(
                 original_cmd_name,
-                self.list_commands(ctx),  # type: ignore
+                self.list_commands(ctx),  # type: ignore[attr-defined]
                 self.max_suggestions,
                 self.cutoff,
             )
@@ -47,7 +47,7 @@ def resolve_command(
                 error_msg += "\n\n"
                 error_msg += f"Did you mean one of these?\n    {fmt_matches}"
 
-            raise click.exceptions.UsageError(error_msg, error.ctx)
+            raise click.exceptions.UsageError(error_msg, error.ctx) from error
 
 
 class DYMGroup(DYMMixin, click.Group):
diff --git a/tests/test_core.py b/tests/test_core.py
index 3e62a97..ce9541a 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -5,8 +5,8 @@
 from click_didyoumean import DYMCommandCollection, DYMGroup
 
 
-@pytest.fixture(scope="function")
-def runner(request):
+@pytest.fixture()
+def runner():
     return CliRunner()