diff --git a/jedi/evaluate/syntax_tree.py b/jedi/evaluate/syntax_tree.py
index 083c451e..b934ed5a 100644
--- a/jedi/evaluate/syntax_tree.py
+++ b/jedi/evaluate/syntax_tree.py
@@ -149,28 +149,28 @@ def eval_node(context, element):
         return eval_or_test(context, element)
 
 
-def eval_trailer(context, base_contexts, trailer):
+def eval_trailer(context, atom_contexts, trailer):
     trailer_op, node = trailer.children[:2]
     if node == ')':  # `arglist` is optional.
         node = None
 
     if trailer_op == '[':
         trailer_op, node, _ = trailer.children
-        return base_contexts.get_item(
+        return atom_contexts.get_item(
             eval_subscript_list(context.evaluator, context, node),
             ContextualizedNode(context, trailer)
         )
     else:
-        debug.dbg('eval_trailer: %s in %s', trailer, base_contexts)
+        debug.dbg('eval_trailer: %s in %s', trailer, atom_contexts)
         if trailer_op == '.':
-            return base_contexts.py__getattribute__(
+            return atom_contexts.py__getattribute__(
                 name_context=context,
                 name_or_str=node
             )
         else:
             assert trailer_op == '(', 'trailer_op is actually %s' % trailer_op
             args = arguments.TreeArguments(context.evaluator, context, node, trailer)
-            return base_contexts.execute(args)
+            return atom_contexts.execute(args)
 
 
 def eval_atom(context, atom):