diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index c36fa38cf..f7e20ea85 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -7,7 +7,7 @@ repos:
       rev: 'v0.0.292'
       hooks:
         - id: ruff
-          args: ["--fix"]
+          args: ["--fix", "--show-fixes"]
 
     - repo: https://github.com/pre-commit/pre-commit-hooks
       rev: v4.4.0
@@ -17,7 +17,7 @@ repos:
         - id: end-of-file-fixer
         - id: check-docstring-first
 
-    - repo: https://github.com/psf/black
+    - repo: https://github.com/psf/black-pre-commit-mirror
       rev: 23.9.1
       hooks:
         - id: black
diff --git a/.readthedocs.yml b/.readthedocs.yml
new file mode 100644
index 000000000..7e4965745
--- /dev/null
+++ b/.readthedocs.yml
@@ -0,0 +1,18 @@
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+version: 2
+
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+sphinx:
+  configuration: docs/conf.py
+
+python:
+  install:
+    - method: pip
+      path: .
+      extra_requirements:
+        - docs
diff --git a/flox/visualize.py b/flox/visualize.py
index 7d44c7d91..17c0a6596 100644
--- a/flox/visualize.py
+++ b/flox/visualize.py
@@ -179,7 +179,7 @@ def _visualize_cohorts(by, cohorts, ax=None):
 
 def visualize_groups_2d(labels, y0=0, **kwargs):
     colors = mpl.cm.tab10_r
-    for i, chunk in enumerate(labels):
+    for _i, chunk in enumerate(labels):
         chunk = np.atleast_2d(chunk)
         draw_mesh(
             *chunk.shape,
diff --git a/pyproject.toml b/pyproject.toml
index e41fb17eb..83cd04252 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,7 +41,6 @@ requires = [
     "numpy_groupies>=0.9.19",
     "toolz",
     "setuptools>=61.0.0",
-    "wheel",
     "setuptools_scm[toml]>=7.0",
 ]
 build-backend = "setuptools.build_meta"
@@ -77,6 +76,8 @@ ignore = [
     "E731",
 ]
 select = [
+    # Bugbear
+    # "B",
     # Pyflakes
     "F",
     # Pycodestyle
@@ -124,6 +125,8 @@ ignore_missing_imports = true
 
 [tool.pytest.ini_options]
 addopts = "--tb=short"
+minversion = "7"
+testpaths = ["tests"]
 
 
 [tool.codespell]