diff --git a/tests/extmod/uctypes_error.py b/tests/extmod/uctypes_error.py
index 95ba0fad44..68106ac782 100644
--- a/tests/extmod/uctypes_error.py
+++ b/tests/extmod/uctypes_error.py
@@ -35,3 +35,9 @@ try:
     S.x = 1 
 except TypeError:
     print('TypeError')
+
+# unsupported unary op
+try:
+    hash(S)
+except TypeError:
+    print('TypeError')
diff --git a/tests/extmod/uctypes_error.py.exp b/tests/extmod/uctypes_error.py.exp
index 802c260d2b..f2e9c12f7f 100644
--- a/tests/extmod/uctypes_error.py.exp
+++ b/tests/extmod/uctypes_error.py.exp
@@ -2,3 +2,4 @@ TypeError
 TypeError
 TypeError
 TypeError
+TypeError