diff --git a/jedi/evaluate/__init__.py b/jedi/evaluate/__init__.py
index ddc8ee25..422c0e97 100644
--- a/jedi/evaluate/__init__.py
+++ b/jedi/evaluate/__init__.py
@@ -268,9 +268,7 @@ class Evaluator(object):
                                     c = r.expression_list()[0]
                                     if c in ('*', '**'):
                                         t = 'tuple' if c == '*' else 'dict'
-                                        res_new = [er.Instance(
-                                            self, self.find_name(builtin.Builtin.scope, t)[0])
-                                        ]
+                                        res_new = self.execute(self.find_name(builtin.Builtin.scope, t)[0])
                                 if not r.assignment_details:
                                     # this means that there are no default params,
                                     # so just ignore it.
@@ -346,11 +344,11 @@ class Evaluator(object):
                     # not known. Therefore add a new instance for self. Otherwise
                     # take the existing.
                     if isinstance(scope, er.InstanceElement):
-                        inst = scope.instance
+                        result.append(scope.instance)
                     else:
-                        inst = er.Instance(self, er.Class(self, until()))
-                        inst.is_generated = True
-                    result.append(inst)
+                        for inst in self.execute(er.Class(self, until())):
+                            inst.is_generated = True
+                            result.append(inst)
                 elif par.isinstance(pr.Statement):
                     def is_execution(calls):
                         for c in calls:
@@ -599,7 +597,9 @@ class Evaluator(object):
                 # for pr.Literal
                 scopes = self.find_name(builtin.Builtin.scope, current.type_as_string())
                 # Make instances of those number/string objects.
-                scopes = [er.Instance(self, s, (current.value,)) for s in scopes]
+                scopes = itertools.chain.from_iterable(
+                    self.execute(s, (current.value,)) for s in scopes
+                )
             types = imports.strip_imports(self, scopes)
 
         return self.follow_path(path, types, scope, position=position)
@@ -665,7 +665,7 @@ class Evaluator(object):
                                            position=position))
         return self.follow_path(path, set(result), scope, position=position)
 
-    def execute(self, obj, params, evaluate_generator=False):
+    def execute(self, obj, params=(), evaluate_generator=False):
         if obj.isinstance(er.Function):
             obj = obj.get_decorated_func()
 
diff --git a/jedi/evaluate/dynamic.py b/jedi/evaluate/dynamic.py
index eaf5037e..ac479395 100644
--- a/jedi/evaluate/dynamic.py
+++ b/jedi/evaluate/dynamic.py
@@ -487,10 +487,6 @@ def _check_isinstance_type(evaluator, stmt, search_name):
 
     result = []
     for c in evaluator.eval_call(classes[0]):
-        if isinstance(c, er.Array):
-            result += c.get_index_types()
-        else:
-            result.append(c)
-    for i, c in enumerate(result):
-        result[i] = er.Instance(evaluator, c)
+        for typ in (c.get_index_types() if isinstance(c, er.Array) else [c]):
+            result += evaluator.execute(typ)
     return result
diff --git a/jedi/evaluate/representation.py b/jedi/evaluate/representation.py
index 4536e796..170d6905 100644
--- a/jedi/evaluate/representation.py
+++ b/jedi/evaluate/representation.py
@@ -80,7 +80,7 @@ class Instance(use_metaclass(CachedMetaClass, Executable)):
             return None
 
     @memoize_default([])
-    def _get_self_attributes(self):
+    def get_self_attributes(self):
         def add_self_dot_name(name):
             """
             Need to copy and rewrite the name, because names are now
@@ -117,8 +117,8 @@ class Instance(use_metaclass(CachedMetaClass, Executable)):
                     add_self_dot_name(n)
 
         for s in self.base.get_super_classes():
-            names += Instance(self._evaluator, s)._get_self_attributes()
-
+            for inst in self._evaluator.execute(s):
+                names += inst.get_self_attributes()
         return names
 
     def get_subscope_by_name(self, name):
@@ -142,7 +142,7 @@ class Instance(use_metaclass(CachedMetaClass, Executable)):
         Get the instance vars of a class. This includes the vars of all
         classes
         """
-        names = self._get_self_attributes()
+        names = self.get_self_attributes()
 
         class_names = self.base.instance_names()
         for var in class_names:
@@ -154,7 +154,7 @@ class Instance(use_metaclass(CachedMetaClass, Executable)):
         An Instance has two scopes: The scope with self names and the class
         scope. Instance variables have priority over the class scope.
         """
-        yield self, self._get_self_attributes()
+        yield self, self.get_self_attributes()
 
         names = []
         class_names = self.base.instance_names()
@@ -719,8 +719,8 @@ class Generator(use_metaclass(CachedMetaClass, pr.Base, Iterable)):
 
     def __getattr__(self, name):
         if name not in ['start_pos', 'end_pos', 'parent', 'get_imports',
-                        'asserts', 'doc', 'docstr', 'get_parent_until', 'get_code',
-                        'subscopes']:
+                        'asserts', 'doc', 'docstr', 'get_parent_until',
+                        'get_code', 'subscopes']:
             raise AttributeError("Accessing %s of %s is not allowed."
                                  % (self, name))
         return getattr(self.func, name)
@@ -801,7 +801,7 @@ class Array(use_metaclass(CachedMetaClass, pr.Base, Iterable)):
         """
         # `array.type` is a string with the type, e.g. 'list'.
         scope = self._evaluator.find_name(builtin.Builtin.scope, self._array.type)[0]
-        scope = Instance(self._evaluator, scope)
+        scope = self._evaluator.execute(scope)[0]  # builtins only have one class
         names = scope.get_defined_names()
         return [ArrayMethod(n) for n in names]
 
diff --git a/jedi/evaluate/stdlib.py b/jedi/evaluate/stdlib.py
index bbb3572b..5fe41ffa 100644
--- a/jedi/evaluate/stdlib.py
+++ b/jedi/evaluate/stdlib.py
@@ -77,7 +77,7 @@ def builtins_super(evaluator, obj, params):
             cls = er.Class(evaluator, cls)
             su = cls.get_super_classes()
             if su:
-                return [er.Instance(evaluator, su[0])]
+                return evaluator.execute(su[0])
     return []