diff --git a/jedi/common/context.py b/jedi/common/context.py
index b690ad33..92a5fe01 100644
--- a/jedi/common/context.py
+++ b/jedi/common/context.py
@@ -53,7 +53,7 @@ class BaseContextSet(object):
         return len(self._set)
 
     def __repr__(self):
-        return '%s(%s)' % (self.__class__.__name__, ', '.join(str(s) for s in self._set))
+        return 'S{%s}' % (', '.join(str(s) for s in self._set))
 
     def filter(self, filter_func):
         return self.__class__(filter(filter_func, self._set))
diff --git a/jedi/evaluate/finder.py b/jedi/evaluate/finder.py
index 82c11fee..1cdacaaf 100644
--- a/jedi/evaluate/finder.py
+++ b/jedi/evaluate/finder.py
@@ -282,7 +282,7 @@ def _check_isinstance_type(context, element, search_name):
     for cls_or_tup in lazy_context_cls.infer():
         if isinstance(cls_or_tup, iterable.Sequence) and cls_or_tup.array_type == 'tuple':
             for lazy_context in cls_or_tup.py__iter__():
-                context_set |= lazy_context.infer().execute_evaluated(context)
+                context_set |= lazy_context.infer().execute_evaluated()
         else:
-            context_set |= helpers.execute_evaluated(cls_or_tup)
+            context_set |= cls_or_tup.execute_evaluated()
     return context_set