diff --git a/Makefile b/Makefile
index 3b9a57fd..05b2db98 100644
--- a/Makefile
+++ b/Makefile
@@ -187,7 +187,7 @@ fixtures:
 
 	docker exec mail_override_hostname /bin/sh -c "nc 0.0.0.0 25 < /tmp/docker-mailserver-test/email-templates/existing-user1.txt"
 	# Wait for mails to be analyzed
-	sleep 20
+	sleep 40
 
 tests:
 	# Start tests