diff --git a/tests.R b/tests.R
index 920a40a72a68c4ef43076e98b7405c5c10d744d7..f0a50749e55dc5819f4245304c6a261f583c03b0 100644
--- a/tests.R
+++ b/tests.R
@@ -2,7 +2,7 @@
 library(readr)
 library(dplyr)
 library(data.table)
-library(drake) # don't use it? You should
+library(drake) # don't use it? You should. You'll see why
 library(lubridate)
 library(hms)
 library(saveData)
@@ -24,6 +24,9 @@ getFile <- function(f){
 
 # drake plan ----
 # this gets run once and only once
+# drake does what's in the plan and only re-does it if something in
+# the plan changes - such as the file to be loaded
+
 plan <- drake::drake_plan(
   wHRawD = getFile(rawF),
   wHprocessedD = getFile(processedF)