1 files changed, 11 insertions, 0 deletions
diff --git a/test/test_except.py b/test/test_except.py
index 626c8be..40ca3ee 100644
--- a/test/test_except.py
+++ b/test/test_except.py
@@ -50,3 +50,14 @@ def test_invalidvalue():
 
     with raises(StackError):
         unpackb(b"\x91" * 3000)  # nested fixarray(len=1)
+
+
+def test_strict_map_key():
+    valid = {u"unicode": 1, b"bytes": 2}
+    packed = packb(valid, use_bin_type=True)
+    assert valid == unpackb(packed, raw=True)
+
+    invalid = {42: 1}
+    packed = packb(invalid, use_bin_type=True)
+    with raises(ValueError):
+        unpackb(packed, raw=True)