diff --git a/jedi/parser/tree.py b/jedi/parser/tree.py
index 0044973d..27fd89f0 100644
--- a/jedi/parser/tree.py
+++ b/jedi/parser/tree.py
@@ -763,14 +763,16 @@ class Class(ClassOrFunc):
             children = arglist.children
         except AttributeError:
             if arglist is not None:
-                yield arglist
+                for node_to_execute in arglist.nodes_to_execute():
+                    yield node_to_execute
         else:
             for argument in children:
                 if argument.type == 'argument':
                     # metaclass= or list comprehension or */**
                     raise NotImplementedError('Metaclasses not implemented')
                 else:
-                    yield argument
+                    for node_to_execute in argument.nodes_to_execute():
+                        yield node_to_execute
 
         # care for the class suite:
         for node in self.children[self.children.index(':'):]:
diff --git a/test/static_analysis/class_simple.py b/test/static_analysis/class_simple.py
new file mode 100644
index 00000000..3f84fde0
--- /dev/null
+++ b/test/static_analysis/class_simple.py
@@ -0,0 +1,13 @@
+class Base(object):
+    class Nested():
+        def foo():
+            pass
+
+
+class X(Base.Nested):
+    pass
+
+
+X().foo()
+#! 4 attribute-error
+X().bar()