diff --git a/test/lib/aux.sh b/test/lib/aux.sh
index 7c0c1891d..e3dfdd978 100644
--- a/test/lib/aux.sh
+++ b/test/lib/aux.sh
@@ -98,9 +98,11 @@ teardown_devs_prefixed() {
 	# Resume suspended devices first
 	for dm in $(dm_info suspended,name | grep "^Suspended:.*$prefix"); do
 		echo "dmsetup resume \"${dm#Suspended:}\""
-		dmsetup resume "${dm#Suspended:}" || true
+		dmsetup resume "${dm#Suspended:}" &
 	done
 
+	wait
+
 	local mounts=( $(grep "$prefix" /proc/mounts | cut -d' ' -f1) )
 	if test ${#mounts[@]} -gt 0; then
 		test "$stray" -eq 0 || echo "Removing stray mounted devices containing $prefix: ${mounts[@]}"