diff --git a/jedi/evaluate/compiled/__init__.py b/jedi/evaluate/compiled/__init__.py
index 77ed844e..5171448f 100644
--- a/jedi/evaluate/compiled/__init__.py
+++ b/jedi/evaluate/compiled/__init__.py
@@ -39,7 +39,6 @@ class CheckAttribute(object):
 class CompiledObject(Base):
     # comply with the parser
     start_pos = 0, 0
-    asserts = []
     path = None  # modules have this attribute - set it to None.
 
     def __init__(self, obj, parent=None):
diff --git a/jedi/evaluate/finder.py b/jedi/evaluate/finder.py
index c5906dab..85a1329f 100644
--- a/jedi/evaluate/finder.py
+++ b/jedi/evaluate/finder.py
@@ -388,12 +388,18 @@ def check_flow_information(evaluator, flow, search_name, pos):
 
     result = []
     if flow.is_scope():
-        for ass in reversed(flow.asserts):
-            if pos is None or ass.start_pos > pos:
-                continue
-            result = _check_isinstance_type(evaluator, ass.assertion(), search_name)
-            if result:
-                break
+        # Check for asserts.
+        try:
+            names = reversed(flow.names_dict[search_name.value])
+        except (KeyError, AttributeError):
+            names = []
+
+        for name in names:
+            ass = name.get_parent_until(pr.AssertStmt)
+            if isinstance(ass, pr.AssertStmt) and pos is not None and ass.start_pos < pos:
+                result = _check_isinstance_type(evaluator, ass.assertion(), search_name)
+                if result:
+                    break
 
     if isinstance(flow, (pr.IfStmt, pr.WhileStmt)):
         element = flow.children[1]
diff --git a/jedi/evaluate/iterable.py b/jedi/evaluate/iterable.py
index 29816cd4..a3ea1970 100644
--- a/jedi/evaluate/iterable.py
+++ b/jedi/evaluate/iterable.py
@@ -88,7 +88,7 @@ class Generator(use_metaclass(CachedMetaClass, IterableWrapper, GeneratorMixin))
 
     def __getattr__(self, name):
         if name not in ['start_pos', 'end_pos', 'parent', 'get_imports',
-                        'asserts', 'doc', 'docstr', 'get_parent_until',
+                        'doc', 'docstr', 'get_parent_until',
                         'get_code', 'subscopes']:
             raise AttributeError("Accessing %s of %s is not allowed."
                                  % (self, name))
diff --git a/jedi/evaluate/representation.py b/jedi/evaluate/representation.py
index e1ed6d4a..6a80a5fe 100644
--- a/jedi/evaluate/representation.py
+++ b/jedi/evaluate/representation.py
@@ -231,7 +231,7 @@ class Instance(use_metaclass(CachedMetaClass, Executed)):
 
     def __getattr__(self, name):
         if name not in ['start_pos', 'end_pos', 'get_imports', 'type',
-                        'doc', 'raw_doc', 'asserts']:
+                        'doc', 'raw_doc']:
             raise AttributeError("Instance %s: Don't touch this (%s)!"
                                  % (self, name))
         return getattr(self.base, name)
@@ -449,7 +449,7 @@ class Class(use_metaclass(CachedMetaClass, Wrapper)):
         raise KeyError("Couldn't find subscope.")
 
     def __getattr__(self, name):
-        if name not in ['start_pos', 'end_pos', 'parent', 'asserts', 'raw_doc',
+        if name not in ['start_pos', 'end_pos', 'parent', 'raw_doc',
                         'doc', 'get_imports', 'get_parent_until', 'get_code',
                         'subscopes', 'names_dict', 'type']:
             raise AttributeError("Don't touch this: %s of %s !" % (name, self))
@@ -667,11 +667,6 @@ class FunctionExecution(Executed):
     def yields(self):
         return self._copy_list(self.base.yields)
 
-    @common.safe_property
-    @memoize_default([])
-    def asserts(self):
-        return self._copy_list(self.base.asserts)
-
     @common.safe_property
     @memoize_default([])
     def statements(self):
diff --git a/jedi/parser/tree.py b/jedi/parser/tree.py
index 52150efd..668bb5bb 100644
--- a/jedi/parser/tree.py
+++ b/jedi/parser/tree.py
@@ -526,12 +526,6 @@ class Scope(BaseNode, DocstringMixin):
         # returns will be in "normal" modules.
         return self._search_in_scope(ReturnStmt)
 
-    @property
-    def asserts(self):
-        # Needed here for fast_parser, because the fast_parser splits and
-        # returns will be in "normal" modules.
-        return self._search_in_scope(AssertStmt)
-
     @property
     def subscopes(self):
         return self._search_in_scope(Scope)
@@ -1203,8 +1197,3 @@ class CompFor(BaseNode):
 
     def get_defined_names(self):
         return _defined_names(self.children[1])
-
-    @property
-    def asserts(self):
-        """Since it's a scope, it can be asked for asserts."""
-        return []