diff --git a/test/irb/test_pager.rb b/test/irb/test_pager.rb
index 5a61b0e91..d0d0a2785 100644
--- a/test/irb/test_pager.rb
+++ b/test/irb/test_pager.rb
@@ -54,6 +54,8 @@ def test_overflow
     end
 
     def test_callback_delay
+      omit if RUBY_ENGINE == "truffleruby"
+
       actual_events = []
       overflow_callback = ->(lines) do
         actual_events << [:callback_called, lines]
diff --git a/test/irb/test_ruby_lex.rb b/test/irb/test_ruby_lex.rb
index 533e27443..40c772be1 100644
--- a/test/irb/test_ruby_lex.rb
+++ b/test/irb/test_ruby_lex.rb
@@ -14,6 +14,8 @@ def teardown
     end
 
     def test_interpolate_token_with_heredoc_and_unclosed_embexpr
+      omit if RUBY_ENGINE == "truffleruby"
+
       code = <<~'EOC'
         ①+<<A-②
         #{③*<<B/④