1 files changed, 10 insertions, 13 deletions
diff --git a/spec/ruby/core/string/chop_spec.rb b/spec/ruby/core/string/chop_spec.rb
index 266d973f67..2113da543b 100644
--- a/spec/ruby/core/string/chop_spec.rb
+++ b/spec/ruby/core/string/chop_spec.rb
@@ -1,4 +1,5 @@
 # -*- encoding: utf-8 -*-
+# frozen_string_literal: false
 require_relative '../../spec_helper'
 require_relative 'fixtures/classes'
 
@@ -46,19 +47,15 @@ describe "String#chop" do
 
   it "returns a new string when applied to an empty string" do
     s = ""
-    s.chop.should_not equal(s)
+    s.chop.should_not.equal?(s)
   end
 
-  ruby_version_is ''...'3.0' do
-    it "returns subclass instances when called on a subclass" do
-      StringSpecs::MyString.new("hello\n").chop.should be_an_instance_of(StringSpecs::MyString)
-    end
+  it "returns String instances when called on a subclass" do
+    StringSpecs::MyString.new("hello\n").chop.should.instance_of?(String)
   end
 
-  ruby_version_is '3.0' do
-    it "returns String instances when called on a subclass" do
-      StringSpecs::MyString.new("hello\n").chop.should be_an_instance_of(String)
-    end
+  it "returns a String in the same encoding as self" do
+    "abc\n\n".encode("US-ASCII").chop.encoding.should == Encoding::US_ASCII
   end
 end
 
@@ -102,21 +99,21 @@ describe "String#chop!" do
 
   it "returns self if modifications were made" do
     str = "hello"
-    str.chop!.should equal(str)
+    str.chop!.should.equal?(str)
   end
 
   it "returns nil when called on an empty string" do
-    "".chop!.should be_nil
+    "".chop!.should == nil
   end
 
   it "raises a FrozenError on a frozen instance that is modified" do
-    -> { "string\n\r".freeze.chop! }.should raise_error(FrozenError)
+    -> { "string\n\r".freeze.chop! }.should.raise(FrozenError)
   end
 
   # see [ruby-core:23666]
   it "raises a FrozenError on a frozen instance that would not be modified" do
     a = ""
     a.freeze
-    -> { a.chop! }.should raise_error(FrozenError)
+    -> { a.chop! }.should.raise(FrozenError)
   end
 end