skip on Prism generated iseq

test/ruby/test_iseq.rb

@@ -835,8 +835,14 @@ class TestISeq < Test::Unit::TestCase
   end
 
   def test_unused_param
-    assert_equal true, RubyVM::InstructionSequence.of(method(:block_using_method)).to_a.dig(11, :use_block)
-    assert_equal nil, RubyVM::InstructionSequence.of(method(:block_unused_method)).to_a.dig(11, :use_block)
+    a = RubyVM::InstructionSequence.of(method(:block_using_method)).to_a
+
+    omit 'TODO: Prism' if a.dig(4, :parser) != :"parse.y"
+
+    assert_equal true, a.dig(11, :use_block)
+
+    b = RubyVM::InstructionSequence.of(method(:block_unused_method)).to_a
+    assert_equal nil, b.dig(11, :use_block)
   end
 
   def test_compile_prism_with_invalid_object_type