diff --git a/tests/testthat/project-MASS/MASS.R b/tests/testthat/project-MASS/MASS.R
deleted file mode 100644
index 09972541..00000000
--- a/tests/testthat/project-MASS/MASS.R
+++ /dev/null
@@ -1 +0,0 @@
-library(MASS)
diff --git a/tests/testthat/test-bundlePackage.R b/tests/testthat/test-bundlePackage.R
index 140bc1e7..1d321fdc 100644
--- a/tests/testthat/test-bundlePackage.R
+++ b/tests/testthat/test-bundlePackage.R
@@ -1,4 +1,7 @@
 test_that("can snapshot deps with renv", {
+  skip_if_not_installed("foreign")
+  skip_if_not_installed("MASS")
+
   app_dir <- local_temp_app(list(foo.R = "library(foreign); library(MASS)"))
 
   expect_snapshot(pkgs <- bundlePackages(app_dir))
@@ -13,6 +16,9 @@ test_that("can snapshot deps with renv", {
 })
 
 test_that("can snapshot deps with packrat (option)", {
+  skip_if_not_installed("foreign")
+  skip_if_not_installed("MASS")
+
   withr::local_options(rsconnect.packrat = TRUE)
 
   app_dir <- local_temp_app(list(foo.R = "library(foreign); library(MASS)"))
@@ -28,6 +34,9 @@ test_that("can snapshot deps with packrat (option)", {
 })
 
 test_that("can snapshot deps with packrat (env var)", {
+  skip_if_not_installed("foreign")
+  skip_if_not_installed("MASS")
+
   withr::local_envvar(RSCONNECT_PACKRAT = "TRUE")
 
   app_dir <- local_temp_app(list(foo.R = "library(foreign); library(MASS)"))
@@ -43,6 +52,9 @@ test_that("can snapshot deps with packrat (env var)", {
 })
 
 test_that("can capture deps from renv lockfile", {
+  skip_if_not_installed("foreign")
+  skip_if_not_installed("MASS")
+
   withr::local_options(renv.verbose = FALSE)
 
   app_dir <- local_temp_app(list(foo.R = "library(foreign); library(MASS)"))
@@ -60,6 +72,9 @@ test_that("can capture deps from renv lockfile", {
 })
 
 test_that("can capture deps with packrat even when renv lockfile present", {
+  skip_if_not_installed("foreign")
+  skip_if_not_installed("MASS")
+
   withr::local_envvar(RSCONNECT_PACKRAT = "TRUE")
   withr::local_options(renv.verbose = FALSE)
 
diff --git a/tests/testthat/test-bundlePackagePackrat.R b/tests/testthat/test-bundlePackagePackrat.R
index e8411d1d..b427347a 100644
--- a/tests/testthat/test-bundlePackagePackrat.R
+++ b/tests/testthat/test-bundlePackagePackrat.R
@@ -27,6 +27,7 @@ test_that("uninstalled packages error", {
 })
 
 test_that("recommended packages are snapshotted", {
+  skip_if_not_installed("MASS")
   app <- local_temp_app(list("index.Rmd" = c(
     "```{r}",
     "library(MASS)",
diff --git a/tests/testthat/test-bundlePackageRenv.R b/tests/testthat/test-bundlePackageRenv.R
index 49453afe..73eaf5a1 100644
--- a/tests/testthat/test-bundlePackageRenv.R
+++ b/tests/testthat/test-bundlePackageRenv.R
@@ -18,6 +18,8 @@ test_that("manifest has correct data types", {
 
 test_that("recommended packages are snapshotted", {
   skip_on_cran()
+  skip_if_not_installed("MASS")
+
   withr::local_options(renv.verbose = TRUE)
   app <- local_temp_app(list("index.Rmd" = c(
     "```{r}",
@@ -30,6 +32,8 @@ test_that("recommended packages are snapshotted", {
 
 test_that("extra packages are snapshotted", {
   skip_on_cran()
+  skip_if_not_installed("foreign")
+
   withr::local_options(renv.verbose = TRUE)
   app <- local_temp_app(list("index.Rmd" = ""))
   deps <- snapshotRenvDependencies(app, extraPackages = c("foreign"))
@@ -39,6 +43,7 @@ test_that("extra packages are snapshotted", {
 test_that("works with BioC packages", {
   skip_on_cran()
   skip_on_ci()
+
   app <- local_temp_app(list("index.R" = c(
     "library(Biobase)"
   )))
@@ -68,6 +73,8 @@ test_that("works with BioC packages", {
 # https://github.com/rstudio/rsconnect/issues/968
 test_that("large directories are analyzed", {
   skip_on_cran()
+  skip_if_not_installed("foreign")
+
   app_dir <- local_temp_app(list("foo.R" = "library(foreign)"))
   data_dir <- file.path(app_dir, "data")
   dir.create(data_dir)
@@ -83,6 +90,9 @@ test_that("large directories are analyzed", {
 # parseRenvDependencies ---------------------------------------------------
 
 test_that("gets DESCRIPTION from renv & system libraries", {
+  skip_if_not_installed("foreign")
+  skip_if_not_installed("MASS")
+
   withr::local_options(renv.verbose = FALSE)
 
   app_dir <- local_temp_app(list("foo.R" = "library(foreign); library(MASS)"))
@@ -98,6 +108,9 @@ test_that("gets DESCRIPTION from renv & system libraries", {
 
 
 test_that("errors if library and project are inconsistent", {
+  skip_if_not_installed("foreign")
+  skip_if_not_installed("MASS")
+
   withr::local_options(renv.verbose = FALSE)
 
   app_dir <- local_temp_app(list("foo.R" = "library(foreign); library(MASS)"))
diff --git a/tests/testthat/test-writeManifest.R b/tests/testthat/test-writeManifest.R
index b9ac440b..dc0662d1 100644
--- a/tests/testthat/test-writeManifest.R
+++ b/tests/testthat/test-writeManifest.R
@@ -9,6 +9,8 @@ makeManifest <- function(appDir, appPrimaryDoc = NULL, ...) {
 
 test_that("renv.lock is included for renv projects", {
   skip_on_cran()
+  skip_if_not_installed("foreign")
+  skip_if_not_installed("MASS")
 
   withr::local_options(renv.verbose = FALSE)
 
@@ -23,6 +25,8 @@ test_that("renv.lock is included for renv projects", {
 
 test_that("renv.lock is not included for non-renv projects", {
   skip_on_cran()
+  skip_if_not_installed("foreign")
+  skip_if_not_installed("MASS")
 
   withr::local_options(renv.verbose = FALSE)