diff --git a/activesupport/test/core_ext/secure_random_test.rb b/activesupport/test/core_ext/secure_random_test.rb
index 88c8a37c5d..4b73233971 100644
--- a/activesupport/test/core_ext/secure_random_test.rb
+++ b/activesupport/test/core_ext/secure_random_test.rb
@@ -20,7 +20,7 @@ class SecureRandomTest < ActiveSupport::TestCase
     assert_equal 24, s1.length
   end
 
-  def test_base36_lowercase
+  def test_base36
     s1 = SecureRandom.base36
     s2 = SecureRandom.base36