diff --git a/tests/testthat/helper_expectations.R b/tests/testthat/helper_expectations.R
index b4589e35..90bb34e7 100644
--- a/tests/testthat/helper_expectations.R
+++ b/tests/testthat/helper_expectations.R
@@ -1,24 +1,22 @@
 expect_prediction_clust = function(p) {
   expect_prediction(p)
-  checkmate::expect_r6(p, "PredictionClust",
+  expect_r6(p, "PredictionClust",
     public = c("row_ids", "truth", "predict_types", "prob", "partition")
   )
-  checkmate::expect_numeric(p$truth, any.missing = TRUE, len = length(p$row_ids), null.ok = TRUE)
-  checkmate::expect_numeric(p$partition,
+  expect_numeric(p$truth, any.missing = TRUE, len = length(p$row_ids), null.ok = TRUE)
+  expect_numeric(p$partition,
     any.missing = FALSE, len = length(p$row_ids),
     null.ok = TRUE
   )
   if ("prob" %in% p$predict_types) {
-    checkmate::expect_matrix(p$prob, "numeric", any.missing = FALSE, nrows = length(p$row_ids))
+    expect_matrix(p$prob, "numeric", any.missing = FALSE, nrows = length(p$row_ids))
   }
 }
 
-expect_task_clust = function(task) {
-  checkmate::expect_r6(task, "TaskClust")
-}
+expect_task_clust = function(task) expect_r6(task, "TaskClust")
 
 expect_prediction_complete = function(p, predict_type) {
-  expect_false(checkmate::anyMissing(p[[predict_type]]))
+  expect_false(anyMissing(p[[predict_type]]))
 }
 
 expect_prediction_exclusive = function(p, predict_type) {
diff --git a/tests/testthat/test_mlr_learners_clust_ap.R b/tests/testthat/test_mlr_learners_clust_ap.R
index 2071f692..54d3995d 100644
--- a/tests/testthat/test_mlr_learners_clust_ap.R
+++ b/tests/testthat/test_mlr_learners_clust_ap.R
@@ -24,7 +24,7 @@ test_that("Learner properties are respected", {
     parset = parset_list[[i]]
     learner$param_set$values = parset
 
-    suppressWarnings({p = learner$train(task)$predict(task)})
+    p = suppressWarnings(learner$train(task)$predict(task))
     expect_prediction_clust(p)
 
     if ("complete" %in% learner$properties) {