diff --git a/test.bash b/test.bash
index 8cc40bc..6691ffb 100755
--- a/test.bash
+++ b/test.bash
@@ -2,6 +2,7 @@
 
 if [[ -z $TMPDIR ]]; then
 	TMPDIR=/var/tmp
+	export TMPDIR
 else
 	echo "Using TMPDIR=$TMPDIR"
 fi