diff --git a/scripts/check-sample.sh b/scripts/check-sample.sh
index e5312a4f11..3615265174 100755
--- a/scripts/check-sample.sh
+++ b/scripts/check-sample.sh
@@ -6,6 +6,9 @@ then
   exit 0
 fi
 
+# Set session token to empty string to check that it gets ignored
+export AWS_SESSION_TOKEN=
+
 # Set bash to print out every command that's running to the screen
 # Set logging after checking credentials so that we don't leak them
 set -xv