diff --git a/tests/testthat/test-C5.R b/tests/testthat/test-C5.R
index 264f044..cce914c 100644
--- a/tests/testthat/test-C5.R
+++ b/tests/testthat/test-C5.R
@@ -66,6 +66,7 @@ test_that('check model reduction', {
 # ------------------------------------------------------------------------------
 
 test_that('check C5 parsnip interface', {
+  skip_if_not_installed("modeldata")
 
   set.seed(4779)
   expect_error(
diff --git a/tests/testthat/test-cart.R b/tests/testthat/test-cart.R
index 73918a2..54077d6 100644
--- a/tests/testthat/test-cart.R
+++ b/tests/testthat/test-cart.R
@@ -99,6 +99,8 @@ test_that('check model reduction', {
 # ------------------------------------------------------------------------------
 
 test_that('check CART parsnip interface', {
+  skip_if_not_installed("modeldata")
+
   set.seed(4779)
   expect_error(
     reg_mod <- bag_tree(cost_complexity = .001, min_n = 3) %>%
@@ -204,6 +206,7 @@ test_that('mode specific package dependencies', {
 
 test_that('case weights', {
   skip_if_not_installed("modeldata")
+
   data("two_class_dat", package = "modeldata")
   set.seed(1)
   wts <- runif(nrow(two_class_dat))
diff --git a/tests/testthat/test-mars.R b/tests/testthat/test-mars.R
index 26f9e45..f6c94db 100644
--- a/tests/testthat/test-mars.R
+++ b/tests/testthat/test-mars.R
@@ -1,5 +1,7 @@
 test_that('check mars opt', {
   skip_if_not_installed("earth")
+  skip_if_not_installed("modeldata")
+
   set.seed(36323)
   check_pruning <- function(x, ...) {
     rlang::eval_tidy(x$call$pmethod) == "backward"
@@ -91,6 +93,8 @@ test_that('check model reduction', {
 
 test_that('check MARS parsnip interface', {
   skip_if_not_installed("earth")
+  skip_if_not_installed("modeldata")
+
   set.seed(4779)
   expect_error(
     reg_mod <- bag_mars(num_terms = 5, prod_degree = 2) %>%
diff --git a/tests/testthat/test-nnet.R b/tests/testthat/test-nnet.R
index cffc5fe..cbc8501 100644
--- a/tests/testthat/test-nnet.R
+++ b/tests/testthat/test-nnet.R
@@ -1,6 +1,8 @@
 
 test_that('check nnet parsnip interface', {
   skip_if_not_installed("nnet")
+  skip_if_not_installed("modeldata")
+
   data(two_class_dat, package = "modeldata")
 
   set.seed(4779)
diff --git a/tests/testthat/test-validation.R b/tests/testthat/test-validation.R
index ea8e505..a871251 100644
--- a/tests/testthat/test-validation.R
+++ b/tests/testthat/test-validation.R
@@ -88,6 +88,8 @@ test_that('validate imps', {
 
 test_that('bad inputs', {
   skip_if_not_installed("earth")
+  skip_if_not_installed("modeldata")
+
   expect_error(
     bagger(mpg ~ ., data = mtcars, base_model = letters[1:2]),
     "should be a single character value."