diff --git a/Lib/test/test_extcall.py b/Lib/test/test_extcall.py
index 6860751..4aa2dfc 100644
--- a/Lib/test/test_extcall.py
+++ b/Lib/test/test_extcall.py
@@ -201,6 +201,21 @@
       ...
     TypeError: h() argument after ** must be a mapping, not function
 
+    >>> h(**[])
+    Traceback (most recent call last):
+      ...
+    TypeError: h() argument after ** must be a mapping, not list
+
+    >>> h(a=1, **h)
+    Traceback (most recent call last):
+      ...
+    TypeError: h() argument after ** must be a mapping, not function
+
+    >>> h(a=1, **[])
+    Traceback (most recent call last):
+      ...
+    TypeError: h() argument after ** must be a mapping, not list
+
     >>> dir(**h)
     Traceback (most recent call last):
       ...