diff --git a/appveyor.yml b/appveyor.yml
index 9043ba6..a3dddb3 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -11,6 +11,7 @@ install:
   ps: Bootstrap
 
 build_script:
+  - travis-tool.sh r_install maps geojsonio
   - travis-tool.sh install_github jeroenooms/V8
   - travis-tool.sh install_deps
 
diff --git a/tests/testthat/test-count.R b/tests/testthat/test-count.R
index d1bfc0a..d22300a 100644
--- a/tests/testthat/test-count.R
+++ b/tests/testthat/test-count.R
@@ -16,5 +16,4 @@ test_that("lawn_count works", {
 test_that("count fails correctly", {
   expect_error(lawn_count(), "argument \"polygons\" is missing, with no default")
   expect_error(lawn_count(polygons = ply, points = 4), "Cannot read property")
-  #expect_error(lawn_count(polygons = ply, points = pts, NULL), "expecting a single value")
 })
diff --git a/tests/testthat/test-sample.R b/tests/testthat/test-sample.R
index c47ff83..9e0347e 100644
--- a/tests/testthat/test-sample.R
+++ b/tests/testthat/test-sample.R
@@ -26,8 +26,6 @@ test_that("n parameter works as expected", {
 })
 
 test_that("lawn_sample fails correctly", {
-  # missing arguments
-  #expect_error(lawn_sample(), "expecting a single value")
   # n of negative number gives back no data
   expect_equal(length(lawn_sample(dat, -1)$features), 0)
   # n of character string errors