1 files changed, 13 insertions, 14 deletions
diff --git a/spec/ruby/core/string/insert_spec.rb b/spec/ruby/core/string/insert_spec.rb
index 588b8ab272..483f3c9367 100644
--- a/spec/ruby/core/string/insert_spec.rb
+++ b/spec/ruby/core/string/insert_spec.rb
@@ -1,5 +1,5 @@
 # -*- encoding: utf-8 -*-
-
+# frozen_string_literal: false
 require_relative '../../spec_helper'
 require_relative 'fixtures/classes'
 
@@ -41,26 +41,16 @@ describe "String#insert with index, other" do
     "abcd".insert(-3, other).should == "abXYZcd"
   end
 
-  it "taints self if string to insert is tainted" do
-    str = "abcd"
-    str.insert(0, "T".taint).tainted?.should == true
-
-    str = "abcd"
-    other = mock('T')
-    def other.to_str() "T".taint end
-    str.insert(0, other).tainted?.should == true
-  end
-
   it "raises a TypeError if other can't be converted to string" do
     -> { "abcd".insert(-6, Object.new)}.should raise_error(TypeError)
     -> { "abcd".insert(-6, [])        }.should raise_error(TypeError)
     -> { "abcd".insert(-6, mock('x')) }.should raise_error(TypeError)
   end
 
-  it "raises a #{frozen_error_class} if self is frozen" do
+  it "raises a FrozenError if self is frozen" do
     str = "abcd".freeze
-    -> { str.insert(4, '')  }.should raise_error(frozen_error_class)
-    -> { str.insert(4, 'X') }.should raise_error(frozen_error_class)
+    -> { str.insert(4, '')  }.should raise_error(FrozenError)
+    -> { str.insert(4, 'X') }.should raise_error(FrozenError)
   end
 
   it "inserts a character into a multibyte encoded string" do
@@ -79,4 +69,13 @@ describe "String#insert with index, other" do
       "あれ".insert 0, pat
     end.should raise_error(Encoding::CompatibilityError)
   end
+
+  it "should not call subclassed string methods" do
+    cls = Class.new(String) do
+      def replace(arg)
+        raise "should not call replace"
+      end
+    end
+    cls.new("abcd").insert(0, 'X').should == "Xabcd"
+  end
 end