diff --git a/jedi/evaluate/analysis.py b/jedi/evaluate/analysis.py
index dee947ff..d48a043c 100644
--- a/jedi/evaluate/analysis.py
+++ b/jedi/evaluate/analysis.py
@@ -203,10 +203,10 @@ def _check_for_exception_catch(node_context, jedi_name, exception, payload=None)
     while obj is not None and not isinstance(obj, (tree.Function, tree.Class)):
         if isinstance(obj, tree.Flow):
             # try/except catch check
-            if obj.isinstance(tree.TryStmt) and check_try_for_except(obj, exception):
+            if obj.type == 'try_stmt' and check_try_for_except(obj, exception):
                 return True
             # hasattr check
-            if exception == AttributeError and obj.isinstance(tree.IfStmt, tree.WhileStmt):
+            if exception == AttributeError and obj.type in ('if_stmt', 'while_stmt'):
                 if check_hasattr(obj.children[1], obj.children[3]):
                     return True
         obj = obj.parent
diff --git a/jedi/evaluate/finder.py b/jedi/evaluate/finder.py
index 82e75948..7a3f2e10 100644
--- a/jedi/evaluate/finder.py
+++ b/jedi/evaluate/finder.py
@@ -165,11 +165,11 @@ class NameFinder(object):
 def _name_to_types(evaluator, context, tree_name):
     types = []
     node = tree_name.get_definition()
-    if node.isinstance(tree.ForStmt):
+    if node.type == 'for_stmt':
         types = pep0484.find_type_from_comment_hint_for(context, node, tree_name)
         if types:
             return types
-    if node.isinstance(tree.WithStmt):
+    if node.type == 'with_stmt':
         types = pep0484.find_type_from_comment_hint_with(context, node, tree_name)
         if types:
             return types
@@ -180,9 +180,9 @@ def _name_to_types(evaluator, context, tree_name):
             container_types = context.eval_node(node.children[3])
             for_types = iterable.py__iter__types(evaluator, container_types, node.children[3])
             types = check_tuple_assignments(evaluator, for_types, tree_name)
-    elif node.isinstance(tree.ExprStmt):
+    elif node.type == 'expr_stmt':
         types = _remove_statements(evaluator, context, node, tree_name)
-    elif node.isinstance(tree.WithStmt):
+    elif node.type == 'with_stmt':
         types = context.eval_node(node.node_from_name(tree_name))
     elif isinstance(node, tree.Import):
         types = imports.infer_import(context, tree_name)
diff --git a/jedi/parser/tree.py b/jedi/parser/tree.py
index eb04417b..83469bb9 100644
--- a/jedi/parser/tree.py
+++ b/jedi/parser/tree.py
@@ -120,9 +120,6 @@ class Base(object):
     """
     __slots__ = ()
 
-    def isinstance(self, *cls):
-        return isinstance(self, cls)
-
     def get_root_node(self):
         scope = self
         while scope.parent is not None:
@@ -142,7 +139,7 @@ class Base(object):
         scope = self if include_current else self.parent
         while scope.parent is not None:
             # TODO why if classes?
-            if classes and reverse != scope.isinstance(*classes):
+            if classes and reverse != isinstance(scope, classes):
                 break
             scope = scope.parent
         return scope
@@ -166,7 +163,7 @@ class Base(object):
         scope = self
         while scope.parent is not None:
             parent = scope.parent
-            if scope.isinstance(Node, Leaf) and parent.type != 'simple_stmt':
+            if isinstance(scope, (Node, Leaf)) and parent.type != 'simple_stmt':
                 if scope.type == 'testlist_comp':
                     try:
                         if isinstance(scope.children[1], CompFor):
@@ -608,9 +605,9 @@ class BaseNode(Base):
         after the node, including the #
         """
         try:
-            if self.isinstance(ForStmt):
+            if self.type == 'for_stmt':
                 whitespace = self.children[5].first_leaf().prefix
-            elif self.isinstance(WithStmt):
+            elif self.type == 'with_stmt':
                 whitespace = self.children[3].first_leaf().prefix
             else:
                 whitespace = self.last_leaf().get_next_leaf().prefix