diff --git a/tenacity/__init__.py b/tenacity/__init__.py
index c6484a8..802bde7 100644
--- a/tenacity/__init__.py
+++ b/tenacity/__init__.py
@@ -205,7 +205,7 @@ def __exit__(
         self,
         exc_type: type[BaseException] | None,
         exc_value: BaseException | None,
-        traceback: t.Optional["types.TracebackType"],
+        traceback: "types.TracebackType | None",
     ) -> bool | None:
         if exc_type is not None and exc_value is not None:
             self.retry_state.set_exception((exc_type, exc_value, traceback))
@@ -221,7 +221,7 @@ async def __aexit__(
         self,
         exc_type: type[BaseException] | None,
         exc_value: BaseException | None,
-        traceback: t.Optional["types.TracebackType"],
+        traceback: "types.TracebackType | None",
     ) -> bool | None:
         return self.__exit__(exc_type, exc_value, traceback)
 
@@ -259,8 +259,8 @@ def __init__(
     def copy(
         self,
         sleep: t.Callable[[int | float], None] | object = _unset,
-        stop: t.Union["StopBaseT", object] = _unset,
-        wait: t.Union["WaitBaseT", object] = _unset,
+        stop: "StopBaseT | object" = _unset,
+        wait: "WaitBaseT | object" = _unset,
         retry: retry_base | object = _unset,
         before: t.Callable[["RetryCallState"], None] | object = _unset,
         after: t.Callable[["RetryCallState"], None] | object = _unset,
diff --git a/tenacity/wait.py b/tenacity/wait.py
index f06f3cc..dd1090c 100644
--- a/tenacity/wait.py
+++ b/tenacity/wait.py
@@ -34,7 +34,7 @@ def __call__(self, retry_state: "RetryCallState") -> float:
     def __add__(self, other: "wait_base") -> "wait_combine":
         return wait_combine(self, other)
 
-    def __radd__(self, other: "wait_base") -> typing.Union["wait_combine", "wait_base"]:
+    def __radd__(self, other: "wait_base") -> "wait_combine | wait_base":
         # make it possible to use multiple waits with the built-in sum function
         if other == 0:  # type: ignore[comparison-overlap]
             return self