1 files changed, 4 insertions, 0 deletions
diff --git a/test/ruby/test_compile_prism.rb b/test/ruby/test_compile_prism.rb
index 5ed41569f5..bccc4d4695 100644
--- a/test/ruby/test_compile_prism.rb
+++ b/test/ruby/test_compile_prism.rb
@@ -1545,6 +1545,10 @@ a
       CODE
     end
 
+    def test_repeated_required_underscore
+      assert_prism_eval("def self.m(a, _, _, b); end; method(:m).parameters")
+    end
+
     def test_locals_in_parameters
       assert_prism_eval("def self.m(a = b = c = 1); [a, b, c]; end; self.m")
     end