diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a30d3195c..9b00f9b29 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -17,14 +17,14 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["2.4.10", "2.5.8", "2.6.6", "2.7.2", "jruby-9.2"]
+        ruby: ["2.4.10", "2.5.8", "2.6.6", "2.7.2", "3.0.0", "jruby-9.2"]
         test_command: ["bundle exec rake test"]
         include:
           - ruby: "head"
             test_command: "bundle exec rake test || true"
           - ruby: "truffleruby"
             test_command: "bundle exec rake test || true"
-          - ruby: "2.7.2"
+          - ruby: "3.0.0"
             test_command: "./ci/run_rubocop_specs || true"
     steps:
     - uses: actions/checkout@v2
diff --git a/lib/parser/current.rb b/lib/parser/current.rb
index 326ad6dd1..5f84bdff0 100644
--- a/lib/parser/current.rb
+++ b/lib/parser/current.rb
@@ -94,8 +94,8 @@ def warn_syntax_deviation(feature, version)
 
   else # :nocov:
     # Keep this in sync with released Ruby.
-    warn_syntax_deviation 'parser/ruby27', '2.7.x'
-    require 'parser/ruby27'
-    CurrentRuby = Ruby27
+    warn_syntax_deviation 'parser/ruby30', '3.0.x'
+    require 'parser/ruby30'
+    CurrentRuby = Ruby30
   end
 end