diff --git a/Lib/test/test_grammar.py b/Lib/test/test_grammar.py
index 5b20ab3..45e3c49 100644
--- a/Lib/test/test_grammar.py
+++ b/Lib/test/test_grammar.py
@@ -255,6 +255,10 @@
 d22v(*(1, 2, 3, 4))
 d22v(1, 2, *(3, 4, 5))
 d22v(1, *(2, 3), **{'d': 4})
+def d31v((x)): pass
+d31v(1)
+def d32v((x,)): pass
+d32v((1,))
 
 ### lambdef: 'lambda' [varargslist] ':' test
 print 'lambdef'
diff --git a/Lib/test/test_inspect.py b/Lib/test/test_inspect.py
index ce346b9..79be369 100644
--- a/Lib/test/test_inspect.py
+++ b/Lib/test/test_inspect.py
@@ -304,10 +304,12 @@
         self.assertArgSpecEquals(A.m, ['self'])
 
     def test_getargspec_sublistofone(self):
-        def sublistOfOne((foo)): return 1
-
+        def sublistOfOne((foo,)): return 1
         self.assertArgSpecEquals(sublistOfOne, [['foo']])
 
+        def fakeSublistOfOne((foo)): return 1
+        self.assertArgSpecEquals(fakeSublistOfOne, ['foo'])
+
     def test_classify_oldstyle(self):
         class A:
             def s(): pass