diff --git a/test/ruby/test_env.rb b/test/ruby/test_env.rb
index e8ae762d03..b01c3b12ee 100644
--- a/test/ruby/test_env.rb
+++ b/test/ruby/test_env.rb
@@ -496,7 +496,7 @@ class TestEnv < Test::Unit::TestCase
     end
   end
 
-  def test_frozen
+  def test_frozen_env
     assert_raise(TypeError) { ENV.freeze }
   end