Rubymine 8 does not show inherited functions in the auto-complete window

Create a SuperClass and put a few functions in there

Create a SubClass that inherits from the SuperClass                     "class SubClass < SuperClass"

In a spec file, create an instance of the SubClass                           "@variable = subclass.new"

Using the new variable, try to access the inherited functions          "@variable."

The functions of the SubClass appear in the code completion window, but the functions of the SuperClass do not.

Any ideas? I'm new to both Ruby and Rubymine