diff --git a/pipelines/rails-ci/pipeline.rb b/pipelines/rails-ci/pipeline.rb
index e084a31..9845c96 100644
--- a/pipelines/rails-ci/pipeline.rb
+++ b/pipelines/rails-ci/pipeline.rb
@@ -16,7 +16,7 @@
     build_context.rubies << Buildkite::Config::RubyConfig.master_debug_ruby
     build_context.default_ruby = Buildkite::Config::RubyConfig.master_ruby
   else
-    build_context.setup_rubies %w(2.4 2.5 2.6 2.7 3.0 3.1 3.2 3.3 3.4.0-preview2)
+    build_context.setup_rubies %w(2.4 2.5 2.6 2.7 3.0 3.1 3.2 3.3 3.4.0-rc1)
   end
 
   group do
diff --git a/test/buildkite_config/test_build_context.rb b/test/buildkite_config/test_build_context.rb
index 176a9c4..9eb3e4b 100644
--- a/test/buildkite_config/test_build_context.rb
+++ b/test/buildkite_config/test_build_context.rb
@@ -169,11 +169,11 @@ def test_setup_preview_rubies
 
     sub.stub(:min_ruby, Gem::Version.new("2.7")) do
       sub.stub(:max_ruby, Gem::Version.new("3.5")) do
-        sub.setup_rubies %w(3.4.0-preview2 3.3 3.2 3.1 3.0)
+        sub.setup_rubies %w(3.4.0-rc1 3.3 3.2 3.1 3.0)
       end
     end
 
-    assert_equal "3.4.0-preview2", sub.default_ruby.version.to_s
+    assert_equal "3.4.0-rc1", sub.default_ruby.version.to_s
   end
 
   def test_setup_rubies_default_ruby