1 files changed, 14 insertions, 4 deletions
diff --git a/spec/ruby/core/string/shared/succ.rb b/spec/ruby/core/string/shared/succ.rb
index 7ca488dd88..25602103b6 100644
--- a/spec/ruby/core/string/shared/succ.rb
+++ b/spec/ruby/core/string/shared/succ.rb
@@ -59,10 +59,20 @@ describe :string_succ, shared: true do
     "\xFF\xFF".send(@method).should == "\x01\x00\x00"
   end
 
-  it "returns subclass instances when called on a subclass" do
-    StringSpecs::MyString.new("").send(@method).should be_an_instance_of(StringSpecs::MyString)
-    StringSpecs::MyString.new("a").send(@method).should be_an_instance_of(StringSpecs::MyString)
-    StringSpecs::MyString.new("z").send(@method).should be_an_instance_of(StringSpecs::MyString)
+  ruby_version_is ''...'3.0' do
+    it "returns subclass instances when called on a subclass" do
+      StringSpecs::MyString.new("").send(@method).should be_an_instance_of(StringSpecs::MyString)
+      StringSpecs::MyString.new("a").send(@method).should be_an_instance_of(StringSpecs::MyString)
+      StringSpecs::MyString.new("z").send(@method).should be_an_instance_of(StringSpecs::MyString)
+    end
+  end
+
+  ruby_version_is '3.0' do
+    it "returns String instances when called on a subclass" do
+      StringSpecs::MyString.new("").send(@method).should be_an_instance_of(String)
+      StringSpecs::MyString.new("a").send(@method).should be_an_instance_of(String)
+      StringSpecs::MyString.new("z").send(@method).should be_an_instance_of(String)
+    end
   end
 
   ruby_version_is ''...'2.7' do