1 files changed, 7 insertions, 0 deletions
diff --git a/Lib/test/test_extcall.py b/Lib/test/test_extcall.py
index 5525832..b183189 100644
--- a/Lib/test/test_extcall.py
+++ b/Lib/test/test_extcall.py
@@ -1,5 +1,6 @@
 from test.test_support import verify, verbose, TestFailed, sortdict
 from UserList import UserList
+from UserDict import UserDict
 
 def e(a, b):
     print(a, b)
@@ -25,6 +26,12 @@ f(1, 2, 3, **{'a':4, 'b':5})
 f(1, 2, 3, *(4, 5), **{'a':6, 'b':7})
 f(1, 2, 3, x=4, y=5, *(6, 7), **{'a':8, 'b':9})
 
+
+f(1, 2, 3, **UserDict(a=4, b=5))
+f(1, 2, 3, *(4, 5), **UserDict(a=6, b=7))
+f(1, 2, 3, x=4, y=5, *(6, 7), **UserDict(a=8, b=9))
+
+
 # Verify clearing of SF bug #733667
 try:
     e(c=3)