diff --git a/src/itsdangerous/timed.py b/src/itsdangerous/timed.py
index 9187a44..548054c 100644
--- a/src/itsdangerous/timed.py
+++ b/src/itsdangerous/timed.py
@@ -127,7 +127,8 @@ def unsign(
             if ts_int is not None:
                 try:
                     ts_dt = self.timestamp_to_datetime(ts_int)
-                except ValueError as exc:
+                except (ValueError, OSError) as exc:
+                    # Windows raises OSError
                     raise BadTimeSignature(
                         "Malformed timestamp", payload=value
                     ) from exc
diff --git a/tests/test_itsdangerous/test_timed.py b/tests/test_itsdangerous/test_timed.py
index f677b72..56041f0 100644
--- a/tests/test_itsdangerous/test_timed.py
+++ b/tests/test_itsdangerous/test_timed.py
@@ -67,9 +67,6 @@ def test_malformed_timestamp(self, signer):
         assert "Malformed" in str(exc_info.value)
         assert exc_info.value.date_signed is None
 
-    @pytest.mark.skipif(
-        sys.platform == "win32", reason="Freezegun Invalid argument occurs on Windows"
-    )
     def test_malformed_future_timestamp(self, signer):
         signed = b"value.TgPVoaGhoQ.AGBfQ6G6cr07byTRt0zAdPljHOY"