diff --git a/Gemfile b/Gemfile
index ba909e8..6669eae 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,5 +6,5 @@ group :development do
   gem "bundler"
   gem "rake"
   gem "test-unit"
-  gem "test-unit-ruby-core"
+  gem "test-unit-ruby-core", ">= 1.0.7"
 end
diff --git a/test/uri/test_common.rb b/test/uri/test_common.rb
index fef3f70..fef785a 100644
--- a/test/uri/test_common.rb
+++ b/test/uri/test_common.rb
@@ -74,9 +74,6 @@ def test_extract
   def test_ractor
     return unless defined?(Ractor)
     assert_ractor(<<~RUBY, require: 'uri')
-      class Ractor
-        alias value take unless method_defined? :value # compat with Ruby 3.4 and olders
-      end
       r = Ractor.new { URI.parse("https://ruby-lang.org/").inspect }
       assert_equal(URI.parse("https://ruby-lang.org/").inspect, r.value)
     RUBY