Raise exception on unknown bytes

1 files changed, 4 insertions, 4 deletions

diff --git a/tests/test_core.py b/tests/test_core.py
index a1a39a4..bfb6c4f 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -60,7 +60,7 @@ class TestViewState(object):
         assert vs.decode() == ((True, '1q2w3e'), 0)
 
     def test_parse_unknown(self):
-        vs = ViewState()
-        vs.raw = b'\xff\x01\x99\x99\x99'
-        assert vs.decode() == b'\x99\x99\x99'
-
+        with pytest.raises(ViewStateException):
+            vs = ViewState()
+            vs.raw = b'\xff\x01\x99\x99\x99'
+            assert vs.decode()