SQ: Fix test on Python 3.14+

Author: davidfstr

tests.py

@@ -2067,15 +2067,24 @@ class Point2D(mypy_extensions.TypedDict):  # type: ignore[reportGeneralTypeIssue
         class Point3D(Point2D, total=False):  # type: ignore[reportGeneralTypeIssues]  # pyright
             z: int
 
-        self.assertRaisesRegex(
-            TypeNotSupportedError,
-            (
-                "trycast cannot determine which keys are required.*?"
-                "Suggest use a typing(_extensions)?.TypedDict.*?"
-                "strict=False"
-            ),
-            lambda: trycast(Point3D, {"x": 1, "y": 2}, strict=True),
-        )
+        if sys.version_info[:2] >= (3, 14):
+            self.assertRaisesRegex(
+                TypeNotSupportedError,
+                (
+                    "trycast cannot determine which keys exist"
+                ),
+                lambda: trycast(Point3D, {"x": 1, "y": 2}, strict=True),
+            )
+        else:
+            self.assertRaisesRegex(
+                TypeNotSupportedError,
+                (
+                    "trycast cannot determine which keys are required.*?"
+                    "Suggest use a typing(_extensions)?.TypedDict.*?"
+                    "strict=False"
+                ),
+                lambda: trycast(Point3D, {"x": 1, "y": 2}, strict=True),
+            )
 
     # NOTE: Cannot combine the following two if-checks with an `and`
     #       because that is too complicated for Pyre to understand.