diff --git a/test/ruby/test_mmtk.rb b/test/ruby/test_mmtk.rb
index 4ca268a81abf88..b17013a17d5ca2 100644
--- a/test/ruby/test_mmtk.rb
+++ b/test/ruby/test_mmtk.rb
@@ -84,6 +84,7 @@ def test_plan_name
     #assert_in_out_err(['--mmtk-plan=NoGC', '-e puts GC::MMTk.plan_name'], '', ['NoGC'])
     assert_in_out_err(['--mmtk-plan=MarkSweep', '-e puts GC::MMTk.plan_name'], '', ['MarkSweep'])
     assert_in_out_err(['--mmtk-plan=Immix', '-e puts GC::MMTk.plan_name'], '', ['Immix'])
+    assert_in_out_err(['--mmtk-plan=StickyImmix', '-e puts GC::MMTk.plan_name'], '', ['StickyImmix'])
   end
 
   def test_max_heap