diff --git a/actionpack/test/dispatch/request/session_test.rb b/actionpack/test/dispatch/request/session_test.rb
index 80d5a1317160895f4f612d6926cd473d1357921f..3f36d4f1a9d8116025421f9a16887eff47cd7837 100644
--- a/actionpack/test/dispatch/request/session_test.rb
+++ b/actionpack/test/dispatch/request/session_test.rb
@@ -52,6 +52,15 @@ def test_values
         assert_equal %w[ftw awesome], s.values
       end
 
+      def test_clear
+        env = {}
+        s = Session.create(store, env, {})
+        s['rails'] = 'ftw'
+        s['adequate'] = 'awesome'
+        s.clear
+        assert_equal([], s.values)
+      end
+
       private
       def store
         Class.new {