1 files changed, 8 insertions, 0 deletions
diff --git a/test/ruby/test_parse.rb b/test/ruby/test_parse.rb
index 6eef3e9ae0..7229d0acb5 100644
--- a/test/ruby/test_parse.rb
+++ b/test/ruby/test_parse.rb
@@ -1149,6 +1149,14 @@ x = __ENCODING__
     end
   end
 
+  def test_command_def_cmdarg
+    assert_valid_syntax("\n#{<<~"begin;"}\n#{<<~'end;'}")
+    begin;
+      m def x(); end
+      1.tap do end
+    end;
+  end
+
 =begin
   def test_past_scope_variable
     assert_warning(/past scope/) {catch {|tag| eval("BEGIN{throw tag}; tap {a = 1}; a")}}