diff --git a/test/640_proxy_restart_reattaches_test.sh b/test/640_proxy_restart_reattaches_test.sh
index 6bdd65ec..703c3c56 100755
--- a/test/640_proxy_restart_reattaches_test.sh
+++ b/test/640_proxy_restart_reattaches_test.sh
@@ -38,7 +38,7 @@ assert_raises "proxy exec_on $HOST1 c3 $CHECK_ETHWE_UP"
 
 # Restart docker itself, using different commands for systemd- and upstart-managed.
 run_on $HOST1 sh -c "command -v systemctl >/dev/null && sudo systemctl restart docker || sudo service docker restart"
-sleep 1
+sleep 5
 check_attached
 
 end_suite