2 files changed, 36 insertions, 5 deletions
diff --git a/spec/ruby/core/unboundmethod/shared/dup.rb b/spec/ruby/core/unboundmethod/shared/dup.rb
new file mode 100644
index 0000000000..fd30f75c5b
--- /dev/null
+++ b/spec/ruby/core/unboundmethod/shared/dup.rb
@@ -0,0 +1,32 @@
+describe :unboundmethod_dup, shared: true do
+  it "returns a copy of self" do
+    a = Class.instance_method(:instance_method)
+    b = a.send(@method)
+
+    a.should == b
+    a.should_not.equal?(b)
+  end
+
+  ruby_version_is "3.4" do
+    it "copies instance variables" do
+      method = Class.instance_method(:instance_method)
+      method.instance_variable_set(:@ivar, 1)
+      cl = method.send(@method)
+      cl.instance_variables.should == [:@ivar]
+    end
+
+    it "copies the finalizer" do
+      code = <<-'RUBY'
+        obj = Class.instance_method(:instance_method)
+
+        ObjectSpace.define_finalizer(obj, Proc.new { STDOUT.write "finalized\n" })
+
+        obj.clone
+
+        exit 0
+      RUBY
+
+      ruby_exe(code).lines.sort.should == ["finalized\n", "finalized\n"]
+    end
+  end
+end
diff --git a/spec/ruby/core/unboundmethod/shared/to_s.rb b/spec/ruby/core/unboundmethod/shared/to_s.rb
index 38503c3c60..848c1eba2e 100644
--- a/spec/ruby/core/unboundmethod/shared/to_s.rb
+++ b/spec/ruby/core/unboundmethod/shared/to_s.rb
@@ -8,8 +8,8 @@ describe :unboundmethod_to_s, shared: true do
   end
 
   it "returns a String" do
-    @from_module.send(@method).should be_kind_of(String)
-    @from_method.send(@method).should be_kind_of(String)
+    @from_module.send(@method).should.is_a?(String)
+    @from_method.send(@method).should.is_a?(String)
   end
 
   it "the String reflects that this is an UnboundMethod object" do
@@ -20,12 +20,11 @@ describe :unboundmethod_to_s, shared: true do
   it "the String shows the method name, Module defined in and Module extracted from" do
     @from_module.send(@method).should =~ /\bfrom_mod\b/
     @from_module.send(@method).should =~ /\bUnboundMethodSpecs::Mod\b/
-    @from_method.send(@method).should =~ /\bUnboundMethodSpecs::Methods\b/
   end
 
   it "returns a String including all details" do
-    @from_module.send(@method).should.start_with? "#<UnboundMethod: UnboundMethodSpecs::Methods(UnboundMethodSpecs::Mod)#from_mod"
-    @from_method.send(@method).should.start_with? "#<UnboundMethod: UnboundMethodSpecs::Methods(UnboundMethodSpecs::Mod)#from_mod"
+    @from_module.send(@method).should.start_with? "#<UnboundMethod: UnboundMethodSpecs::Mod#from_mod"
+    @from_method.send(@method).should.start_with? "#<UnboundMethod: UnboundMethodSpecs::Mod#from_mod"
   end
 
   it "does not show the defining module if it is the same as the origin" do