1 files changed, 16 insertions, 0 deletions
diff --git a/spec/ruby/core/method/parameters_spec.rb b/spec/ruby/core/method/parameters_spec.rb
index 7d2b37fac7..8495aef4d2 100644
--- a/spec/ruby/core/method/parameters_spec.rb
+++ b/spec/ruby/core/method/parameters_spec.rb
@@ -22,6 +22,8 @@ describe "Method#parameters" do
       local_is_not_parameter = {}
     end
 
+    def forward_parameters(...) end
+
     def underscore_parameters(_, _, _ = 1, *_, _:, _: 2, **_, &_); end
 
     define_method(:one_optional_defined_method) {|x = 1|}
@@ -267,6 +269,20 @@ describe "Method#parameters" do
     end
   end
 
+  ruby_version_is ""..."3.1" do
+    it "returns [:rest, :*], [:block, :&] for forward parameters operator" do
+      m = MethodSpecs::Methods.new
+      m.method(:forward_parameters).parameters.should == [[:rest, :*], [:block, :&]]
+    end
+  end
+
+  ruby_version_is "3.1" do
+    it "returns [:rest, :*], [:keyrest, :**], [:block, :&] for forward parameters operator" do
+      m = MethodSpecs::Methods.new
+      m.method(:forward_parameters).parameters.should == [[:rest, :*], [:keyrest, :**], [:block, :&]]
+    end
+  end
+
   it "returns the args and block for a splat and block argument" do
     m = MethodSpecs::Methods.new
     m.method(:one_splat_one_block).parameters.should == [[:rest, :args], [:block, :block]]