diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index eb7fa3ee..1c7dbd2a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,5 +1,9 @@
 name: numpydoc tests
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.number }}-${{ github.event.ref }}
+  cancel-in-progress: true
+
 on:
   push:
     branches: [main]
@@ -14,7 +18,21 @@ jobs:
         os: [Ubuntu]
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11-dev"]
         sphinx-version:
-          ["sphinx==4.2", "sphinx==4.5", "sphinx==5.0", "sphinx>=5.0"]
+          [
+            "sphinx==4.2",
+            "sphinx==4.5",
+            "sphinx==5.0",
+            "sphinx==5.3",
+            "sphinx==6.0",
+            "sphinx>6.0",
+          ]
+        exclude:
+          - os: Ubuntu
+            python-version: "3.7"
+            sphinx-version: "sphinx==6.0"
+          - os: Ubuntu
+            python-version: "3.7"
+            sphinx-version: "sphinx>6.0"
     steps:
       - uses: actions/checkout@v3
 
@@ -55,6 +73,7 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt install texlive texlive-latex-extra latexmk dvipng
+          pip install "sphinx<6"
 
       - name: Build documentation
         run: |
@@ -106,6 +125,7 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt install texlive texlive-latex-extra latexmk dvipng
+          pip install "sphinx<6"
 
       - name: Build documentation
         run: |
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 611379ed..0611ae01 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -3,7 +3,7 @@
 
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.3.0
+    rev: v4.4.0
     hooks:
       - id: trailing-whitespace
       - id: end-of-file-fixer
@@ -17,7 +17,7 @@ repos:
       - id: check-added-large-files
 
   - repo: https://github.com/psf/black
-    rev: 22.8.0
+    rev: 23.1.0
     hooks:
       - id: black
 
@@ -28,13 +28,13 @@ repos:
         files: \.(html|md|yml|yaml)
         args: [--prose-wrap=preserve]
 
-  - repo: https://github.com/asottile/blacken-docs
-    rev: v1.12.1
+  - repo: https://github.com/adamchainz/blacken-docs
+    rev: 1.13.0
     hooks:
       - id: blacken-docs
 
   - repo: https://github.com/asottile/pyupgrade
-    rev: v2.38.2
+    rev: v3.3.1
     hooks:
       - id: pyupgrade
         args: [--py37-plus]
diff --git a/doc/conf.py b/doc/conf.py
index 560334d9..315bac73 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -81,23 +81,17 @@
 
 html_theme = "pydata_sphinx_theme"
 html_theme_options = {
-    "github_url": "https://github.com/numpy/numpydoc",
     "show_prev_next": False,
-    "navbar_end": ["search-field.html", "navbar-icon-links.html"],
+    "navbar_end": ["theme-switcher", "search-field.html", "navbar-icon-links.html"],
+    "icon_links": [
+        {
+            "name": "GitHub",
+            "url": "https://github.com/numpy/numpydoc",
+            "icon": "fab fa-github-square",
+            "type": "fontawesome",
+        },
+    ],
 }
-# NOTE: The following is required for supporting of older sphinx toolchains.
-#       The "theme-switcher" templated should be added directly to navbar_end
-#       above and the following lines removed when the minimum supported
-#       version of pydata_sphinx_theme is 0.9.0
-# Add version switcher for versions of pydata_sphinx_theme that support it
-import packaging
-import pydata_sphinx_theme
-
-if packaging.version.parse(pydata_sphinx_theme.__version__) >= packaging.version.parse(
-    "0.9.0"
-):
-    html_theme_options["navbar_end"].insert(0, "theme-switcher")
-
 
 html_sidebars = {
     "**": [],
diff --git a/numpydoc/docscrape.py b/numpydoc/docscrape.py
index e5c07f59..317bdab2 100644
--- a/numpydoc/docscrape.py
+++ b/numpydoc/docscrape.py
@@ -408,7 +408,7 @@ def _parse(self):
             msg = "Docstring contains a Receives section but not Yields."
             raise ValueError(msg)
 
-        for (section, content) in sections:
+        for section, content in sections:
             if not section.startswith(".."):
                 section = (s.capitalize() for s in section.split(" "))
                 section = " ".join(section)
@@ -631,7 +631,6 @@ def __init__(self, obj, doc=None, config=None):
 
 
 class ClassDoc(NumpyDocString):
-
     extra_public_methods = ["__call__"]
 
     def __init__(self, cls, doc=None, modulename="", func_doc=FunctionDoc, config=None):
@@ -728,7 +727,15 @@ def _is_show_member(self, name):
         return True
 
 
-def get_doc_object(obj, what=None, doc=None, config=None):
+def get_doc_object(
+    obj,
+    what=None,
+    doc=None,
+    config=None,
+    class_doc=ClassDoc,
+    func_doc=FunctionDoc,
+    obj_doc=ObjDoc,
+):
     if what is None:
         if inspect.isclass(obj):
             what = "class"
@@ -742,10 +749,10 @@ def get_doc_object(obj, what=None, doc=None, config=None):
         config = {}
 
     if what == "class":
-        return ClassDoc(obj, func_doc=FunctionDoc, doc=doc, config=config)
+        return class_doc(obj, func_doc=func_doc, doc=doc, config=config)
     elif what in ("function", "method"):
-        return FunctionDoc(obj, doc=doc, config=config)
+        return func_doc(obj, doc=doc, config=config)
     else:
         if doc is None:
             doc = pydoc.getdoc(obj)
-        return ObjDoc(obj, doc, config=config)
+        return obj_doc(obj, doc, config=config)
diff --git a/numpydoc/docscrape_sphinx.py b/numpydoc/docscrape_sphinx.py
index 9a62cff9..26a8e6b3 100644
--- a/numpydoc/docscrape_sphinx.py
+++ b/numpydoc/docscrape_sphinx.py
@@ -11,6 +11,7 @@
 from sphinx.jinja2glue import BuiltinTemplateLoader
 
 from .docscrape import NumpyDocString, FunctionDoc, ClassDoc, ObjDoc
+from .docscrape import get_doc_object as get_doc_object_orig
 from .xref import make_xref
 
 
@@ -407,20 +408,10 @@ def __init__(self, obj, doc=None, config=None):
         ObjDoc.__init__(self, obj, doc=doc, config=config)
 
 
-# TODO: refactor to use docscrape.get_doc_object
 def get_doc_object(obj, what=None, doc=None, config=None, builder=None):
-    if what is None:
-        if inspect.isclass(obj):
-            what = "class"
-        elif inspect.ismodule(obj):
-            what = "module"
-        elif isinstance(obj, Callable):
-            what = "function"
-        else:
-            what = "object"
-
     if config is None:
         config = {}
+
     template_dirs = [os.path.join(os.path.dirname(__file__), "templates")]
     if builder is not None:
         template_loader = BuiltinTemplateLoader()
@@ -430,11 +421,12 @@ def get_doc_object(obj, what=None, doc=None, config=None, builder=None):
     template_env = SandboxedEnvironment(loader=template_loader)
     config["template"] = template_env.get_template("numpydoc_docstring.rst")
 
-    if what == "class":
-        return SphinxClassDoc(obj, func_doc=SphinxFunctionDoc, doc=doc, config=config)
-    elif what in ("function", "method"):
-        return SphinxFunctionDoc(obj, doc=doc, config=config)
-    else:
-        if doc is None:
-            doc = pydoc.getdoc(obj)
-        return SphinxObjDoc(obj, doc, config=config)
+    return get_doc_object_orig(
+        obj,
+        what=what,
+        doc=doc,
+        config=config,
+        class_doc=SphinxClassDoc,
+        func_doc=SphinxFunctionDoc,
+        obj_doc=SphinxObjDoc,
+    )
diff --git a/numpydoc/tests/test_docscrape.py b/numpydoc/tests/test_docscrape.py
index 227f8724..73dea61d 100644
--- a/numpydoc/tests/test_docscrape.py
+++ b/numpydoc/tests/test_docscrape.py
@@ -1443,7 +1443,6 @@ def __set__(self, obj, value):
             obj._set_axis(self.axis, value)
 
     class Dummy:
-
         attr = SpecialProperty(doc="test attribute")
 
     doc = get_doc_object(Dummy)
diff --git a/numpydoc/tests/test_validate.py b/numpydoc/tests/test_validate.py
index 080affab..f01cde50 100644
--- a/numpydoc/tests/test_validate.py
+++ b/numpydoc/tests/test_validate.py
@@ -506,12 +506,45 @@ def parameters_with_trailing_underscores(self, str_):
         """
         pass
 
+    def parameter_with_wrong_types_as_substrings(self, a, b, c, d, e, f):
+        r"""
+        Ensure PR06 doesn't fail when non-preferable types are substrings.
+
+        While PR06 checks for parameter types which contain non-preferable type
+        names like integer (int), string (str), and boolean (bool), PR06 should
+        not fail if those types are used only as susbtrings in, for example,
+        custom type names.
+
+        Parameters
+        ----------
+        a : Myint
+           Some text.
+        b : intClass
+           Some text.
+        c : Mystring
+           Some text.
+        d : stringClass
+           Some text.
+        e : Mybool
+           Some text.
+        f : boolClass
+           Some text.
+
+        See Also
+        --------
+        related : Something related.
+
+        Examples
+        --------
+        >>> result = 1 + 1
+        """
+        pass
+
 
 class BadGenericDocStrings:
     """Everything here has a bad docstring"""
 
     def func(self):
-
         """Some function.
 
         With several mistakes in the docstring.
@@ -1145,6 +1178,7 @@ def test_good_class(self, capsys):
             "warnings",
             "valid_options_in_parameter_description_sets",
             "parameters_with_trailing_underscores",
+            "parameter_with_wrong_types_as_substrings",
         ],
     )
     def test_good_functions(self, capsys, func):
diff --git a/numpydoc/validate.py b/numpydoc/validate.py
index cc058f0d..b975f831 100644
--- a/numpydoc/validate.py
+++ b/numpydoc/validate.py
@@ -584,7 +584,7 @@ def validate(obj_name):
                     ("string", "str"),
                 ]
                 for wrong_type, right_type in common_type_errors:
-                    if wrong_type in doc.parameter_type(param):
+                    if wrong_type in set(re.split(r"\W", doc.parameter_type(param))):
                         errs.append(
                             error(
                                 "PR06",
diff --git a/requirements/developer.txt b/requirements/developer.txt
index db79816f..b8de207e 100644
--- a/requirements/developer.txt
+++ b/requirements/developer.txt
@@ -1 +1 @@
-pre-commit>=2.20
+pre-commit>=3.0