diff --git a/.github/workflows/test_and_deploy.yml b/.github/workflows/test_and_deploy.yml
index 59e373317..c645cc756 100644
--- a/.github/workflows/test_and_deploy.yml
+++ b/.github/workflows/test_and_deploy.yml
@@ -16,14 +16,13 @@ on:
 jobs:
   test:
     name: Test
-    uses: pyapp-kit/workflows/.github/workflows/test-pyrepo.yml@v1
+    uses: pyapp-kit/workflows/.github/workflows/test-pyrepo.yml@v2
     with:
       os: ${{ matrix.os }}
       python-version: ${{ matrix.python-version }}
       qt: ${{ matrix.qt }}
       pip-install-pre-release: ${{ github.event_name == 'schedule' }}
-      report-failures: ${{ github.event_name == 'schedule' }}
-    secrets: inherit
+      coverage-upload: artifact
     strategy:
       fail-fast: false
       matrix:
@@ -58,18 +57,24 @@ jobs:
 
   test-min-reqs:
     name: Test min reqs
-    uses: pyapp-kit/workflows/.github/workflows/test-pyrepo.yml@main
+    uses: pyapp-kit/workflows/.github/workflows/test-pyrepo.yml@v2
     with:
       os: ubuntu-latest
       python-version: ${{ matrix.python-version }}
       qt: pyqt5
       pip-install-min-reqs: true
-    secrets: inherit
+      coverage-upload: artifact
     strategy:
       fail-fast: false
       matrix:
         python-version: ["3.8", "3.9", "3.10", "3.11"]
 
+  upload_coverage:
+    if: always()
+    needs: [test, test-min-reqs]
+    uses: pyapp-kit/workflows/.github/workflows/upload-coverage.yml@v2
+    secrets: inherit
+
   test-pydantic1:
     name: Test pydantic1
     runs-on: ubuntu-latest
@@ -97,7 +102,7 @@ jobs:
           token: ${{ secrets.CODECOV_TOKEN }}
 
   test-dependents:
-    uses: pyapp-kit/workflows/.github/workflows/test-dependents.yml@v1
+    uses: pyapp-kit/workflows/.github/workflows/test-dependents.yml@v2
     with:
       dependency-repo: ${{ matrix.package }}
       dependency-ref: ${{ matrix.package-version }}
@@ -105,7 +110,7 @@ jobs:
       host-extras: "testing"
       qt: pyqt5
       python-version: "3.10"
-      post-install-cmd: "python -m pip install pytest-pretty lxml_html_clean"  # just for napari
+      post-install-cmd: "python -m pip install pytest-pretty lxml_html_clean" # just for napari
       pytest-args: ${{ matrix.pytest-args }}
     strategy:
       fail-fast: false
diff --git a/pyproject.toml b/pyproject.toml
index 826c20faf..086e58274 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -180,6 +180,7 @@ minversion = "6.0"
 testpaths = ["tests"]
 filterwarnings = [
     "error",
+    "ignore:Failed to disconnect::pytestqt",
     "ignore::DeprecationWarning:tqdm",
     "ignore::DeprecationWarning:docstring_parser",
     "ignore:distutils Version classes are deprecated:DeprecationWarning",
diff --git a/src/magicgui/signature.py b/src/magicgui/signature.py
index 835dd0df5..7170d25e8 100644
--- a/src/magicgui/signature.py
+++ b/src/magicgui/signature.py
@@ -15,6 +15,8 @@
 from __future__ import annotations
 
 import inspect
+import typing
+import warnings
 from types import MappingProxyType
 from typing import TYPE_CHECKING, Any, Callable, Sequence, cast
 
@@ -69,9 +71,65 @@ def make_annotated(annotation: Any = Any, options: dict | None = None) -> Any:
                     f"Every item in Annotated must be castable to a dict, got: {opt!r}"
                 ) from e
             _options.update(_opt)
+
+    annotation = _make_hashable(annotation)
+    _options = _make_hashable(_options)
     return Annotated[annotation, _options]
 
 
+# this is a stupid hack to deal with something that changed in typing-extensions
+# v4.12.0 (and probably python 3.13), where all items in Annotated must now be hashable
+# The PR that necessitated this was https://github.com/python/typing_extensions/pull/392
+
+
+class hashabledict(dict):
+    """Hashable immutable dict."""
+
+    def __hash__(self) -> int:  # type: ignore # noqa: D105
+        # we don't actually want to hash the contents, just the object itself.
+        return id(self)
+
+    def __setitem__(self, key: Any, value: Any) -> None:  # noqa: D105
+        warnings.warn(
+            "Mutating magicgui Annotation metadata after creation is not supported."
+            "This will raise an error in a future version.",
+            stacklevel=2,
+        )
+        super().__setitem__(key, value)
+
+    def __delitem__(self, key: Any) -> None:  # noqa: D105
+        raise TypeError("hashabledict is immutable")
+
+
+def _hashable(obj: Any) -> bool:
+    try:
+        hash(obj)
+        return True
+    except TypeError:
+        return False
+
+
+def _make_hashable(obj: Any) -> Any:
+    if _hashable(obj):
+        return obj
+    if isinstance(obj, dict):
+        return hashabledict({k: _make_hashable(v) for k, v in obj.items()})
+    if isinstance(obj, (list, tuple)):
+        return tuple(_make_hashable(v) for v in obj)
+    if isinstance(obj, set):
+        return frozenset(_make_hashable(v) for v in obj)
+    if (args := get_args(obj)) and (not _hashable(args)):
+        try:
+            obj = get_origin(obj)[_make_hashable(args)]
+        except TypeError:
+            # python 3.8 hack
+            if obj.__module__ == "typing" and hasattr(obj, "_name"):
+                generic = getattr(typing, obj._name)
+                return generic[_make_hashable(args)]
+            raise
+    return obj
+
+
 class _void:
     """private sentinel."""
 
diff --git a/src/magicgui/widgets/_function_gui.py b/src/magicgui/widgets/_function_gui.py
index 440ea0397..b15455ce9 100644
--- a/src/magicgui/widgets/_function_gui.py
+++ b/src/magicgui/widgets/_function_gui.py
@@ -64,7 +64,6 @@ def _inject_tooltips_from_docstrings(
             for split_key in k.split(","):
                 doc_params[split_key.strip()] = v
             del doc_params[k]
-
     for name, description in doc_params.items():
         # this is to catch potentially bad arg_name parsing in docstring_parser
         # if using napoleon style google docstringss
diff --git a/tests/test_types.py b/tests/test_types.py
index 01ab55321..242f7c1a1 100644
--- a/tests/test_types.py
+++ b/tests/test_types.py
@@ -1,6 +1,6 @@
 from enum import Enum
 from pathlib import Path
-from typing import TYPE_CHECKING, Optional, Union
+from typing import TYPE_CHECKING, List, Optional, Union
 from unittest.mock import Mock
 
 import pytest
@@ -117,7 +117,8 @@ def widget2(fn: Union[bytes, pathlib.Path, str]):
 
 def test_optional_type():
     @magicgui(x={"choices": ["a", "b"]})
-    def widget(x: Optional[str] = None): ...
+    def widget(x: Optional[str] = None):
+        ...
 
     assert isinstance(widget.x, widgets.ComboBox)
     assert widget.x.value is None
@@ -231,3 +232,10 @@ def test_pick_widget_literal():
     )
     assert cls == widgets.RadioButtons
     assert set(options["choices"]) == {"a", "b"}
+
+
+def test_redundant_annotation() -> None:
+    # just shouldn't raise
+    @magicgui
+    def f(a: Annotated[List[int], {"annotation": List[int]}]):
+        pass