# we need to add a delay at least 5 second (we add 6 secs to
# get margin). I believe it may take up to 5 second for server
# to detect command connection got closed while data were
# in fly. In this period number of running instances is not dropped,
# therefore new client can not connect (when MaxInstances is set to 1).
#
# change has been submitted toupstream:
#	https://github.com/proftpd/proftpd/pull/1507
#

--- a/tests/t/lib/ProFTPD/Tests/Commands/RETR.pm
+++ b/tests/t/lib/ProFTPD/Tests/Commands/RETR.pm
@@ -2603,6 +2603,7 @@ sub retr_bug3496 {
 
       # Close the _control_ connection immediately
       $client->{ftp}->close();
+      sleep(6);
 
       my $client2 = ProFTPD::TestSuite::FTP->new('127.0.0.1', $port, 1, 1);
       $client2->login($setup->{user}, $setup->{passwd});