1 files changed, 6 insertions, 12 deletions
diff --git a/spec/ruby/core/string/shared/strip.rb b/spec/ruby/core/string/shared/strip.rb
index 9c232b4694..39c7232ff9 100644
--- a/spec/ruby/core/string/shared/strip.rb
+++ b/spec/ruby/core/string/shared/strip.rb
@@ -2,19 +2,13 @@ require_relative '../../../spec_helper'
 require_relative '../fixtures/classes'
 
 describe :string_strip, shared: true do
-  ruby_version_is '3.0' do
-    it "returns String instances when called on a subclass" do
-      StringSpecs::MyString.new(" hello ").send(@method).should be_an_instance_of(String)
-      StringSpecs::MyString.new(" ").send(@method).should be_an_instance_of(String)
-      StringSpecs::MyString.new("").send(@method).should be_an_instance_of(String)
-    end
+  it "returns a String in the same encoding as self" do
+    " hello ".encode("US-ASCII").send(@method).encoding.should == Encoding::US_ASCII
   end
 
-  ruby_version_is ''...'3.0' do
-    it "returns subclass instances when called on a subclass" do
-      StringSpecs::MyString.new(" hello ").send(@method).should be_an_instance_of(StringSpecs::MyString)
-      StringSpecs::MyString.new(" ").send(@method).should be_an_instance_of(StringSpecs::MyString)
-      StringSpecs::MyString.new("").send(@method).should be_an_instance_of(StringSpecs::MyString)
-    end
+  it "returns String instances when called on a subclass" do
+    StringSpecs::MyString.new(" hello ").send(@method).should.instance_of?(String)
+    StringSpecs::MyString.new(" ").send(@method).should.instance_of?(String)
+    StringSpecs::MyString.new("").send(@method).should.instance_of?(String)
   end
 end