1.1 --- a/tests/attr_providers.py	Mon Oct 17 15:39:07 2016 +0200
     1.2 +++ b/tests/attr_providers.py	Mon Oct 17 18:56:34 2016 +0200
     1.3 @@ -16,6 +16,13 @@
     1.4  def f(x):
     1.5      return x.a, x.b
     1.6  
     1.7 +def g(x):
     1.8 +
     1.9 +    # Should only permit D instance and E.
    1.10 +
    1.11 +    x.a = 7
    1.12 +    x.b = 8
    1.13 +
    1.14  c = C()
    1.15  d = D()
    1.16  e = E()