diff --git a/.Rbuildignore b/.Rbuildignore
index 6035242..ca6bc2c 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -7,3 +7,4 @@
 ^README\.Rmd$
 ^README-.*\.png$
 ^LICENSE$
+^CRAN-RELEASE$
diff --git a/CRAN-RELEASE b/CRAN-RELEASE
new file mode 100644
index 0000000..7df706d
--- /dev/null
+++ b/CRAN-RELEASE
@@ -0,0 +1,2 @@
+This package was submitted to CRAN on 2020-09-06.
+Once it is accepted, delete this file and tag the release (commit 7f79fbe).
diff --git a/DESCRIPTION b/DESCRIPTION
index f1d94ec..b8a6314 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -52,5 +52,6 @@ Author: Jacqueline Hughes-Oliver [aut],
 Maintainer: Jeremy Ash <jrash@ncsu.edu>
 Suggests:
     knitr,
-    rmarkdown
+    rmarkdown,
+    testthat
 Encoding: UTF-8