diff --git a/test/etc/test_etc.rb b/test/etc/test_etc.rb
index dc0d5c0fd8..51977e8f3d 100644
--- a/test/etc/test_etc.rb
+++ b/test/etc/test_etc.rb
@@ -178,6 +178,10 @@ class TestEtc < Test::Unit::TestCase
     omit "This test is flaky and intermittently failing now on ModGC workflow" if ENV['GITHUB_WORKFLOW'] == 'ModGC'
 
     assert_ractor(<<~RUBY, require: 'etc', timeout: 60)
+      class Ractor
+        alias join take
+      end unless Ractor.method_defined? :value # compat with Ruby 3.4 and olders
+
       10.times.map do
         Ractor.new do
           100.times do
@@ -204,6 +208,10 @@ class TestEtc < Test::Unit::TestCase
 
   def test_ractor_unsafe
     assert_ractor(<<~RUBY, require: 'etc')
+      class Ractor
+        alias value take
+      end unless Ractor.method_defined? :value # compat with Ruby 3.4 and olders
+
       r = Ractor.new do
         begin
           Etc.passwd