diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index ddc5d7fede..251add0e1f 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -23,7 +23,7 @@ repos:
     hooks:
       - id: black
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.1.11
+    rev: v0.1.13
     hooks:
       - id: ruff
         types: [file]
diff --git a/src/trio/_core/_run.py b/src/trio/_core/_run.py
index c90989e560..72a582ac48 100644
--- a/src/trio/_core/_run.py
+++ b/src/trio/_core/_run.py
@@ -80,15 +80,6 @@
 
     PosArgT = TypeVarTuple("PosArgT")
 
-    # Needs to be guarded, since Unpack[] would be evaluated at runtime.
-    class _NurseryStartFunc(Protocol[Unpack[PosArgT], StatusT_co]):
-        """Type of functions passed to `nursery.start() <trio.Nursery.start>`."""
-
-        def __call__(
-            self, *args: Unpack[PosArgT], task_status: TaskStatus[StatusT_co]
-        ) -> Awaitable[object]:
-            ...
-
 
 DEADLINE_HEAP_MIN_PRUNE_THRESHOLD: Final = 1000
 
diff --git a/src/trio/_socket.py b/src/trio/_socket.py
index 1e530b14a1..940a183677 100644
--- a/src/trio/_socket.py
+++ b/src/trio/_socket.py
@@ -1061,7 +1061,7 @@ def recv(__self, __buflen: int, __flags: int = 0) -> Awaitable[bytes]:
     # _make_simple_sock_method_wrapper is typed, so this checks that the above is correct
     # this requires that we refrain from using `/` to specify pos-only
     # args, or mypy thinks the signature differs from typeshed.
-    recv = _make_simple_sock_method_wrapper(  # noqa: F811
+    recv = _make_simple_sock_method_wrapper(
         _stdlib_socket.socket.recv, _core.wait_readable
     )
 
@@ -1076,7 +1076,7 @@ def recv_into(
         ) -> Awaitable[int]:
             ...
 
-    recv_into = _make_simple_sock_method_wrapper(  # noqa: F811
+    recv_into = _make_simple_sock_method_wrapper(
         _stdlib_socket.socket.recv_into, _core.wait_readable
     )
 
@@ -1091,7 +1091,7 @@ def recvfrom(
         ) -> Awaitable[tuple[bytes, AddressFormat]]:
             ...
 
-    recvfrom = _make_simple_sock_method_wrapper(  # noqa: F811
+    recvfrom = _make_simple_sock_method_wrapper(
         _stdlib_socket.socket.recvfrom, _core.wait_readable
     )
 
@@ -1106,7 +1106,7 @@ def recvfrom_into(
         ) -> Awaitable[tuple[int, AddressFormat]]:
             ...
 
-    recvfrom_into = _make_simple_sock_method_wrapper(  # noqa: F811
+    recvfrom_into = _make_simple_sock_method_wrapper(
         _stdlib_socket.socket.recvfrom_into, _core.wait_readable
     )
 
@@ -1158,7 +1158,7 @@ def recvmsg_into(
         def send(__self, __bytes: Buffer, __flags: int = 0) -> Awaitable[int]:
             ...
 
-    send = _make_simple_sock_method_wrapper(  # noqa: F811
+    send = _make_simple_sock_method_wrapper(
         _stdlib_socket.socket.send, _core.wait_writable
     )
 
diff --git a/src/trio/_subprocess_platform/__init__.py b/src/trio/_subprocess_platform/__init__.py
index 88ff251166..a86772bd55 100644
--- a/src/trio/_subprocess_platform/__init__.py
+++ b/src/trio/_subprocess_platform/__init__.py
@@ -70,7 +70,7 @@ def create_pipe_from_child_output() -> Tuple["ClosableReceiveStream", int]:
 
 try:
     if sys.platform == "win32":
-        from .windows import wait_child_exiting  # noqa: F811
+        from .windows import wait_child_exiting
     elif sys.platform != "linux" and (TYPE_CHECKING or hasattr(_core, "wait_kevent")):
         from .kqueue import wait_child_exiting
     else:
@@ -86,11 +86,11 @@ def create_pipe_from_child_output() -> Tuple["ClosableReceiveStream", int]:
 
     elif os.name == "posix":
 
-        def create_pipe_to_child_stdin():  # noqa: F811
+        def create_pipe_to_child_stdin():
             rfd, wfd = os.pipe()
             return trio.lowlevel.FdStream(wfd), rfd
 
-        def create_pipe_from_child_output():  # noqa: F811
+        def create_pipe_from_child_output():
             rfd, wfd = os.pipe()
             return trio.lowlevel.FdStream(rfd), wfd
 
diff --git a/test-requirements.txt b/test-requirements.txt
index 88da8d534a..d5a55d220d 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -120,7 +120,7 @@ pytz==2023.3.post1
     # via babel
 requests==2.31.0
     # via sphinx
-ruff==0.1.9
+ruff==0.1.13
     # via -r test-requirements.in
 sniffio==1.3.0
     # via -r test-requirements.in