1 files changed, 10 insertions, 18 deletions
diff --git a/spec/ruby/core/string/b_spec.rb b/spec/ruby/core/string/b_spec.rb
index 89fcedf7c4..d181447709 100644
--- a/spec/ruby/core/string/b_spec.rb
+++ b/spec/ruby/core/string/b_spec.rb
@@ -1,24 +1,16 @@
 # -*- encoding: utf-8 -*-
-require File.expand_path('../../../spec_helper', __FILE__)
+# frozen_string_literal: false
+require_relative '../../spec_helper'
 
 describe "String#b" do
-  with_feature :encoding do
-    it "returns an ASCII-8BIT encoded string" do
-      "Hello".b.should == "Hello".force_encoding(Encoding::ASCII_8BIT)
-      "こんちには".b.should == "こんちには".force_encoding(Encoding::ASCII_8BIT)
-    end
-
-    it "returns new string without modifying self" do
-      str = "こんちには"
-      str.b.should_not equal(str)
-      str.should == "こんちには"
-    end
+  it "returns a binary encoded string" do
+    "Hello".b.should == "Hello".force_encoding(Encoding::BINARY)
+    "こんちには".b.should == "こんちには".force_encoding(Encoding::BINARY)
+  end
 
-    it "copies own tainted/untrusted status to the returning value" do
-      utf_8 = "こんちには".taint.untrust
-      ret = utf_8.b
-      ret.tainted?.should be_true
-      ret.untrusted?.should be_true
-    end
+  it "returns new string without modifying self" do
+    str = "こんちには"
+    str.b.should_not.equal?(str)
+    str.should == "こんちには"
   end
 end