diff --git a/sphinx/builders/html/_assets.py b/sphinx/builders/html/_assets.py
index 2fb8dcc28f8..a72c5000bbc 100644
--- a/sphinx/builders/html/_assets.py
+++ b/sphinx/builders/html/_assets.py
@@ -9,7 +9,7 @@
 from sphinx.errors import ThemeError
 
 if TYPE_CHECKING:
-    from sphinx.util._pathlib import _StrPath
+    from pathlib import Path
 
 
 class _CascadingStyleSheet:
@@ -124,7 +124,7 @@ def __getitem__(self, key):
         return os.fspath(self.filename)[key]
 
 
-def _file_checksum(outdir: _StrPath, filename: str | os.PathLike[str]) -> str:
+def _file_checksum(outdir: Path, filename: str | os.PathLike[str]) -> str:
     filename = os.fspath(filename)
     # Don't generate checksums for HTTP URIs
     if '://' in filename:
diff --git a/sphinx/environment/__init__.py b/sphinx/environment/__init__.py
index a6f97ee0137..9b9e9dd306a 100644
--- a/sphinx/environment/__init__.py
+++ b/sphinx/environment/__init__.py
@@ -24,6 +24,7 @@
 
 if TYPE_CHECKING:
     from collections.abc import Generator, Iterator
+    from pathlib import Path
 
     from docutils import nodes
     from docutils.nodes import Node
@@ -34,7 +35,6 @@
     from sphinx.domains import Domain
     from sphinx.events import EventManager
     from sphinx.project import Project
-    from sphinx.util._pathlib import _StrPath
 
 logger = logging.getLogger(__name__)
 
@@ -148,8 +148,8 @@ class BuildEnvironment:
 
     def __init__(self, app: Sphinx):
         self.app: Sphinx = app
-        self.doctreedir: _StrPath = app.doctreedir
-        self.srcdir: _StrPath = app.srcdir
+        self.doctreedir: Path = app.doctreedir
+        self.srcdir: Path = app.srcdir
         self.config: Config = None  # type: ignore[assignment]
         self.config_status: int = CONFIG_UNSET
         self.config_status_extra: str = ''
diff --git a/sphinx/testing/util.py b/sphinx/testing/util.py
index de8f523f95b..e76d4010c49 100644
--- a/sphinx/testing/util.py
+++ b/sphinx/testing/util.py
@@ -17,11 +17,10 @@
 
 if TYPE_CHECKING:
     from io import StringIO
+    from pathlib import Path
 
     from docutils.nodes import Node
 
-    from sphinx.util._pathlib import _StrPath
-
 __all__ = 'SphinxTestApp', 'SphinxTestAppWrapperForSkipBuilding'
 
 
@@ -82,8 +81,8 @@ class SphinxTestApp(application.Sphinx):
     def __init__(
         self,
         buildername: str = 'html',
-        srcdir: _StrPath | None = None,
-        builddir: _StrPath | None = None,
+        srcdir: Path | None = None,
+        builddir: Path | None = None,
         freshenv: bool = False,
         confoverrides: dict | None = None,
         status: IO | None = None,