diff --git a/tests/testthat/test_TunerADBO.R b/tests/testthat/test_TunerADBO.R
index 2bc24ba2..5d677bff 100644
--- a/tests/testthat/test_TunerADBO.R
+++ b/tests/testthat/test_TunerADBO.R
@@ -7,7 +7,7 @@ test_that("adbo tuner works", {
     minsplit  = to_tune(2, 128),
     cp        = to_tune(1e-04, 1e-1))
 
-  rush_plan(n_workers = 4)
+  rush::rush_plan(n_workers = 4)
   instance = ti_async(
     task = tsk("pima"),
     learner = learner,