Fix mypy errors

src/_pytest/config/__init__.py

@@ -309,7 +309,9 @@ def _prepareconfig(
     elif isinstance(args, os.PathLike):
         args = [os.fspath(args)]
     elif not isinstance(args, list):
-        msg = "`args` parameter expected to be a list of strings, got: {!r} (type: {})"
+        msg = (  # type:ignore[unreachable]
+            "`args` parameter expected to be a list of strings, got: {!r} (type: {})"
+        )
         raise TypeError(msg.format(args, type(args)))
 
     config = get_config(args, plugins)

src/_pytest/mark/structures.py

@@ -397,7 +397,7 @@ if TYPE_CHECKING:
     from _pytest.scope import _ScopeName
 
     class _SkipMarkDecorator(MarkDecorator):
-        @overload  # type: ignore[override,misc]
+        @overload  # type: ignore[override,misc,no-overload-impl]
         def __call__(self, arg: Markable) -> Markable:
             ...
 
@@ -415,7 +415,7 @@ if TYPE_CHECKING:
             ...
 
     class _XfailMarkDecorator(MarkDecorator):
-        @overload  # type: ignore[override,misc]
+        @overload  # type: ignore[override,misc,no-overload-impl]
         def __call__(self, arg: Markable) -> Markable:
             ...
 

testing/test_assertrewrite.py

@@ -1059,7 +1059,7 @@ class TestAssertionRewriteHookDetails:
                 e = OSError()
                 e.errno = 10
                 raise e
-                yield
+                yield  # type:ignore[unreachable]
 
             monkeypatch.setattr(
                 _pytest.assertion.rewrite, "atomic_write", atomic_write_failed