diff --git a/DESCRIPTION b/DESCRIPTION
index cb35d08..390309f 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -34,7 +34,8 @@ Suggests:
     testthat(>= 0.9),
     covr,
     withr,
-    mockery
+    mockery,
+    testthis
 LazyData: true
 LazyLoad: true
 VignetteBuilder: knitr
diff --git a/cran-comments.md b/cran-comments.md
new file mode 100644
index 0000000..59c0232
--- /dev/null
+++ b/cran-comments.md
@@ -0,0 +1,17 @@
+## Test environments
+
+* local Windows install, R-3.4.3
+* ubuntu trusty 14.04 (on travis-ci), testing on:
+  - R-release
+  - R-oldrel
+  - R-devel
+* XCode (Mac OS) (on travis-ci)
+
+## R CMD check results
+
+There were no ERRORs or WARNINGs or NOTEs.
+
+
+## Downstream dependencies
+
+`miniCRAN` has only one reverse dependency, `AzureML`, and all tests pass
\ No newline at end of file
diff --git a/tests/testthat/test-6-getCranDescription.R b/tests/testthat/test-6-getCranDescription.R
index 3dd0bc2..530da6c 100644
--- a/tests/testthat/test-6-getCranDescription.R
+++ b/tests/testthat/test-6-getCranDescription.R
@@ -1,4 +1,4 @@
-if (interactive()) library(testthat)
+if (interactive()) {library(testthat); library(testthis)}
 context("get CRAN description")
 
 test_that("can read CRAN description", {
@@ -6,7 +6,7 @@ test_that("can read CRAN description", {
   skip_on_cran()
   mockery::stub(getCranDescription, 
                 what = "tools::CRAN_package_db",
-                function(...) readRDS("mock_data/pdb.rds")
+                function(...) testthis::read_testdata("/pdb.rds")
                 )
   p <- getCranDescription("miniCRAN", repos = c(CRAN = getOption("minicran.mran")))
   expect_is(p, "data.frame")
diff --git a/tests/testthat/mock_data/pdb.rds b/tests/testthat/testdata/pdb.rds
similarity index 100%
rename from tests/testthat/mock_data/pdb.rds
rename to tests/testthat/testdata/pdb.rds