1 files changed, 6 insertions, 15 deletions
diff --git a/spec/ruby/core/hash/shared/to_s.rb b/spec/ruby/core/hash/shared/to_s.rb
index b0e3705d01..7864d7cd4c 100644
--- a/spec/ruby/core/hash/shared/to_s.rb
+++ b/spec/ruby/core/hash/shared/to_s.rb
@@ -2,7 +2,6 @@ require_relative '../../../spec_helper'
 require_relative '../fixtures/classes'
 
 describe :hash_to_s, shared: true do
-
   it "returns a string representation with same order as each()" do
     h = { a: [1, 2], b: -2, d: -6, nil => nil }
 
@@ -25,7 +24,7 @@ describe :hash_to_s, shared: true do
   end
 
   it "does not call #to_s on a String returned from #inspect" do
-    str = "abc"
+    str = +"abc"
     str.should_not_receive(:to_s)
 
     { a: str }.send(@method).should == '{:a=>"abc"}'
@@ -77,22 +76,14 @@ describe :hash_to_s, shared: true do
     y.send(@method).should == "{1=>{0=>{...}}}"
   end
 
-  ruby_version_is ''...'2.7' do
-    it "returns a tainted string if self is tainted and not empty" do
-      {}.taint.send(@method).tainted?.should be_false
-      { nil => nil }.taint.send(@method).tainted?.should be_true
-    end
-
-    it "returns an untrusted string if self is untrusted and not empty" do
-      {}.untrust.send(@method).untrusted?.should be_false
-      { nil => nil }.untrust.send(@method).untrusted?.should be_true
-    end
-  end
-
   it "does not raise if inspected result is not default external encoding" do
     utf_16be = mock("utf_16be")
-    utf_16be.should_receive(:inspect).and_return(%<"utf_16be \u3042">.encode!(Encoding::UTF_16BE))
+    utf_16be.should_receive(:inspect).and_return(%<"utf_16be \u3042">.encode(Encoding::UTF_16BE))
 
     {a: utf_16be}.send(@method).should == '{:a=>"utf_16be \u3042"}'
   end
+
+  it "works for keys and values whose #inspect return a frozen String" do
+    { true => false }.to_s.should == "{true=>false}"
+  end
 end