diff --git a/tests/testthat/helper.R b/tests/testthat/helper.R
index 9310591f5..e990395f6 100644
--- a/tests/testthat/helper.R
+++ b/tests/testthat/helper.R
@@ -1,5 +1,4 @@
 # for graph learner tests
-loadNamespace("mlr3pipelines")
 loadNamespace("mlr3")
 
 # Create 6x6 point grid with 1m distance between points
@@ -203,6 +202,8 @@ test_graph_learner = function(task, resampling,
   learner = "classif.featureless",
   measure = "classif.ce") {
 
+  loadNamespace("mlr3pipelines")
+
   if (!is.null(time_var)) {
     task$set_col_roles(time_var, "time")
     task$set_col_roles(space_var, "space")
diff --git a/tests/testthat/test-1-autoplot.R b/tests/testthat/test-1-autoplot.R
index 35aed8079..f689ecb9c 100644
--- a/tests/testthat/test-1-autoplot.R
+++ b/tests/testthat/test-1-autoplot.R
@@ -1,6 +1,9 @@
 # generic tests
 
 test_that("errors are thrown for non-valid argument settings", {
+  skip_if_not_installed("sf")
+  skip_if_not_installed("patchwork")
+  skip_if_not_installed("ggtext")
   task = test_make_twoclass_task()
   # type does not matter here
   rsp = rsmp("spcv_coords")
@@ -454,6 +457,9 @@ test_that("plot() works for 'repeated_spcv_cstf'", {
 })
 
 test_that("autoplot time + space", {
+  skip_if_not_installed("sf")
+  skip_if_not_installed("patchwork")
+  skip_if_not_installed("ggtext")
   # special data with five temporal levels
   data = cookfarm_sample
   b = mlr3::as_data_backend(data)
diff --git a/tests/testthat/test-ResamplingRepeatedSpCVDisc.R b/tests/testthat/test-ResamplingRepeatedSpCVDisc.R
index 8a9620ba1..37937a5f0 100644
--- a/tests/testthat/test-ResamplingRepeatedSpCVDisc.R
+++ b/tests/testthat/test-ResamplingRepeatedSpCVDisc.R
@@ -29,6 +29,7 @@ test_that("resampling iterations equals folds * repeats", {
 })
 
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - radius + buffer", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("repeated_spcv_disc",
@@ -55,6 +56,7 @@ test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - radius + buffer"
 })
 
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - radius", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("repeated_spcv_disc",
@@ -80,6 +82,7 @@ test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - radius", {
 })
 
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - replace", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("repeated_spcv_disc",
diff --git a/tests/testthat/test-ResamplingRepeatedSpCVTiles.R b/tests/testthat/test-ResamplingRepeatedSpCVTiles.R
index a68d66a9b..d70464dc6 100644
--- a/tests/testthat/test-ResamplingRepeatedSpCVTiles.R
+++ b/tests/testthat/test-ResamplingRepeatedSpCVTiles.R
@@ -1,4 +1,5 @@
 test_that("folds can be printed", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   rsp = rsmp("repeated_spcv_tiles",
     repeats = 2, nsplit = c(4L, 3L), reassign = FALSE)
@@ -8,6 +9,7 @@ test_that("folds can be printed", {
 })
 
 test_that("reps can be printed", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   rsp = rsmp("repeated_spcv_tiles",
     repeats = 5, nsplit = c(4L, 3L), reassign = FALSE)
@@ -17,6 +19,7 @@ test_that("reps can be printed", {
 })
 
 test_that("resampling iterations equals folds * repeats", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   rsp = rsmp("repeated_spcv_tiles",
     repeats = 2, reassign = FALSE, nsplit = c(4L, 3L))
@@ -26,6 +29,7 @@ test_that("resampling iterations equals folds * repeats", {
 })
 
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - nsplit + dsplit", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("repeated_spcv_tiles",
@@ -50,6 +54,7 @@ test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - nsplit + dsplit"
 })
 
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - reassign", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("repeated_spcv_tiles",
@@ -73,6 +78,7 @@ test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - reassign", {
 })
 
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - user_rotation", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("repeated_spcv_tiles",
@@ -98,6 +104,7 @@ test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - user_rotation",
 })
 
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - random rotation", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("repeated_spcv_tiles",
@@ -123,6 +130,7 @@ test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - random rotation"
 })
 
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - random offset", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("repeated_spcv_tiles",
@@ -148,6 +156,7 @@ test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - random offset",
 })
 
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - user offset", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("repeated_spcv_tiles",
diff --git a/tests/testthat/test-ResamplingSpCVBlock.R b/tests/testthat/test-ResamplingSpCVBlock.R
index af7991ddc..976b7ec21 100644
--- a/tests/testthat/test-ResamplingSpCVBlock.R
+++ b/tests/testthat/test-ResamplingSpCVBlock.R
@@ -73,6 +73,7 @@ test_that("mlr3spatiotempcv indices are the same as blockCV indices: selection =
 })
 
 test_that("mlr3spatiotempcv indices are the same as blockCV indices: cols and rows", {
+  skip_if_not_installed("sf")
   task = test_make_blockCV_test_task()
 
   sf::sf_use_s2(use_s2 = FALSE)
@@ -102,6 +103,7 @@ test_that("mlr3spatiotempcv indices are the same as blockCV indices: cols and ro
 })
 
 test_that("mlr3spatiotempcv indices are the same as blockCV indices: rasterLayer", {
+  skip_if_not_installed("sf")
 
   # cran test failure (Error: no arguments in initialization list)
   testthat::skip_on_os("solaris")
@@ -140,6 +142,7 @@ test_that("mlr3spatiotempcv indices are the same as blockCV indices: rasterLayer
 })
 
 test_that("Error when selection = checkboard and folds > 2", {
+  skip_if_not_installed("sf")
   task = test_make_blockCV_test_task()
   expect_error(rsmp("spcv_block", range = 10000L,
     selection = "checkerboard", folds = 5)$instantiate(task))
diff --git a/tests/testthat/test-ResamplingSpCVDisc.R b/tests/testthat/test-ResamplingSpCVDisc.R
index a995ad002..6991b0e80 100644
--- a/tests/testthat/test-ResamplingSpCVDisc.R
+++ b/tests/testthat/test-ResamplingSpCVDisc.R
@@ -1,4 +1,5 @@
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated)", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("spcv_disc", folds = 3L, radius = 200L, buffer = 200L)
diff --git a/tests/testthat/test-ResamplingSpCVTiles.R b/tests/testthat/test-ResamplingSpCVTiles.R
index 48872cbe9..0b0660974 100644
--- a/tests/testthat/test-ResamplingSpCVTiles.R
+++ b/tests/testthat/test-ResamplingSpCVTiles.R
@@ -1,4 +1,5 @@
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated)", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("spcv_tiles", reassign = FALSE, nsplit = c(4L, 3L))
@@ -21,6 +22,7 @@ test_that("mlr3spatiotempcv is equal to sperrorest (repeated)", {
 })
 
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - nsplit + dsplit", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("spcv_tiles",
@@ -44,6 +46,7 @@ test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - nsplit + dsplit"
 })
 
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - reassign", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("spcv_tiles",
@@ -67,6 +70,7 @@ test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - reassign", {
 })
 
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - user_rotation", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("spcv_tiles",
@@ -92,6 +96,7 @@ test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - user_rotation",
 })
 
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - random rotation", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("spcv_tiles",
@@ -117,6 +122,7 @@ test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - random rotation"
 })
 
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - random offset", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("spcv_tiles",
@@ -142,6 +148,7 @@ test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - random offset",
 })
 
 test_that("mlr3spatiotempcv is equal to sperrorest (repeated) - user offset", {
+  skip_if_not_installed("sperrorest")
   task = tsk("ecuador")
   set.seed(42)
   rsp = rsmp("spcv_tiles",
diff --git a/tests/testthat/test-TaskClassifST.R b/tests/testthat/test-TaskClassifST.R
index 182794d2c..6a52fb777 100644
--- a/tests/testthat/test-TaskClassifST.R
+++ b/tests/testthat/test-TaskClassifST.R
@@ -25,6 +25,7 @@ test_that("coordinates can be used as features", {
 })
 
 test_that("sf objects can be used for task creation", {
+  skip_if_not_installed("sf")
   task = test_make_sf_twoclass_task()
 
   expect_output(print(task))
@@ -33,6 +34,7 @@ test_that("sf objects can be used for task creation", {
 })
 
 test_that("sf objects can be used for task creation", {
+  skip_if_not_installed("sf")
   task = test_make_sf_regr_task()
 
   expect_output(print(task))
@@ -42,6 +44,7 @@ test_that("sf objects can be used for task creation", {
 
 # https://github.com/mlr-org/mlr3spatiotempcv/issues/151
 test_that("tasks created from sf objects do not duplicate rows", {
+  skip_if_not_installed("sf")
   data = test_make_sf_twoclass_df()
 
   task = TaskClassifST$new(
diff --git a/tests/testthat/test-as_task.R b/tests/testthat/test-as_task.R
index 1f7b59ae5..75fca4c8a 100644
--- a/tests/testthat/test-as_task.R
+++ b/tests/testthat/test-as_task.R
@@ -18,6 +18,7 @@ test_that("as_task_classif_st.data.rame works", {
 })
 
 test_that("as_task_classif_st.sf works", {
+  skip_if_not_installed("sf")
   data("ecuador", package = "mlr3spatiotempcv")
   ecuador_sf = sf::st_as_sf(ecuador, coords = c("x", "y"), crs = "epsg:32717")
   new_task = as_task_classif_st(ecuador_sf, target = "slides", positive = "TRUE")
@@ -48,6 +49,7 @@ test_that("as_task_regr_st.data.rame works", {
 })
 
 test_that("as_task_regr_st.sf works", {
+  skip_if_not_installed("sf")
   data("cookfarm_sample", package = "mlr3spatiotempcv")
   cookfarm_sf = sf::st_as_sf(cookfarm_sample, coords = c("x", "y"), crs = 26911)
   new_task = as_task_regr_st(cookfarm_sf, target = "PHIHOX")
diff --git a/tests/testthat/test-autotuner.R b/tests/testthat/test-autotuner.R
index e59a3808f..fe8795a96 100644
--- a/tests/testthat/test-autotuner.R
+++ b/tests/testthat/test-autotuner.R
@@ -1,4 +1,8 @@
 test_that("AutoTuner works with sptcv methods", {
+
+  skip_if_not_installed("mlr3tuning")
+  skip_if_not_installed("paradox")
+
   library("paradox")
   library("mlr3tuning")
   library("mlr3spatiotempcv")
diff --git a/tests/testthat/test-helper-DataBackend.R b/tests/testthat/test-helper-DataBackend.R
index 0844075b0..f0da469a4 100644
--- a/tests/testthat/test-helper-DataBackend.R
+++ b/tests/testthat/test-helper-DataBackend.R
@@ -1,6 +1,7 @@
 test_that("get_coordinates function works", {
 
   skip_if_not_installed("mlr3spatial")
+  skip_if_not_installed("sf")
   requireNamespace("mlr3spatial", quietly = TRUE)
   task_1 = tsk("ecuador")
 
@@ -15,6 +16,7 @@ test_that("get_coordinates function works", {
 
 test_that("get_crs function works", {
   skip_if_not_installed("mlr3spatial")
+  skip_if_not_installed("sf")
   requireNamespace("mlr3spatial", quietly = TRUE)
 
   task_1 = tsk("ecuador")
@@ -30,6 +32,7 @@ test_that("get_crs function works", {
 test_that("assert_spatial_task function works", {
 
   skip_if_not_installed("mlr3spatial")
+  skip_if_not_installed("sf")
   requireNamespace("mlr3spatial", quietly = TRUE)
 
   task_1 = tsk("ecuador")
diff --git a/tests/testthat/test-mlr_sptcv_generic.R b/tests/testthat/test-mlr_sptcv_generic.R
index 99e17db98..fb107512b 100644
--- a/tests/testthat/test-mlr_sptcv_generic.R
+++ b/tests/testthat/test-mlr_sptcv_generic.R
@@ -1,6 +1,8 @@
 library(mlr3)
 
 test_that("no duplicated ids", {
+  skip_if_not_installed("blockCV")
+  skip_if_not_installed("sf")
   spcv_rsp = mlr_resamplings$mget(
     as.data.table(mlr_resamplings)[map_lgl(key, grepl, pattern = "spcv"), key]
   )
@@ -17,6 +19,8 @@ test_that("no duplicated ids", {
 })
 
 test_that("grouping throws errors when 'groups' is set", {
+  skip_if_not_installed("blockCV")
+  skip_if_not_installed("sf")
   task = test_make_twoclass_task(group = TRUE)
 
   spcv_rsp = rsmps(c("spcv_coords", "spcv_env"), folds = 2)
@@ -31,6 +35,8 @@ test_that("grouping throws errors when 'groups' is set", {
 })
 
 test_that("train and test set getter functions are working", {
+  skip_if_not_installed("blockCV")
+  skip_if_not_installed("sf")
   task = test_make_twoclass_task()
 
   spcv_rsp = rsmps(c("spcv_coords", "spcv_env"), folds = 2)
@@ -45,6 +51,8 @@ test_that("train and test set getter functions are working", {
 })
 
 test_that("train and test set getter functions are working", {
+  skip_if_not_installed("blockCV")
+  skip_if_not_installed("sf")
   task = test_make_twoclass_task()
 
   spcv_rsp = rsmps(c("repeated_spcv_coords", "repeated_spcv_env"), folds = 2)