diff --git a/ast.c b/ast.c
index 2d219092c7..a1af214b33 100644
--- a/ast.c
+++ b/ast.c
@@ -83,7 +83,7 @@ ast_parse_done(rb_ast_t *ast)
  *  SyntaxError is raised if the given _string_ is invalid syntax.
  *
  *    RubyVM::AbstractSyntaxTree.parse("x = 1 + 2")
- *    # => #<RubyVM::AbstractSyntaxTree::Node(NODE_SCOPE(0) 1:0, 1:9): >
+ *    # => #<RubyVM::AbstractSyntaxTree::Node:SCOPE@1:0-1:9>
  */
 static VALUE
 rb_ast_s_parse(VALUE module, VALUE str)
@@ -112,7 +112,7 @@ rb_ast_parse_str(VALUE str)
  *   valid Ruby syntax.
  *
  *     RubyVM::AbstractSyntaxTree.parse_file("my-app/app.rb")
- *     # => #<RubyVM::AbstractSyntaxTree::Node(NODE_SCOPE(0) 1:0, 31:3): >
+ *     # => #<RubyVM::AbstractSyntaxTree::Node:SCOPE@1:0-31:3>
  */
 static VALUE
 rb_ast_s_parse_file(VALUE module, VALUE path)
@@ -208,14 +208,14 @@ script_lines(VALUE path)
  *   Returns AST nodes of the given _proc_ or _method_.
  *
  *     RubyVM::AbstractSyntaxTree.of(proc {1 + 2})
- *     # => #<RubyVM::AbstractSyntaxTree::Node(NODE_SCOPE(0) 1:35, 1:42): >
+ *     # => #<RubyVM::AbstractSyntaxTree::Node:SCOPE@1:35-1:42>
  *
  *     def hello
  *       puts "hello, world"
  *     end
  *
  *     RubyVM::AbstractSyntaxTree.of(method(:hello))
- *     # => #<RubyVM::AbstractSyntaxTree::Node(NODE_SCOPE(0) 1:0, 3:3): >
+ *     # => #<RubyVM::AbstractSyntaxTree::Node:SCOPE@1:0-3:3>
  */
 static VALUE
 rb_ast_s_of(VALUE module, VALUE body)