diff --git a/tests/ftpserver.pl b/tests/ftpserver.pl
index 74cf9f230e..0975a20dd2 100755
--- a/tests/ftpserver.pl
+++ b/tests/ftpserver.pl
@@ -2639,7 +2639,10 @@ sub customize {
         }
         elsif($_ =~ /CAPA (.*)/) {
             logmsg "FTPD: instructed to support CAPABILITY command\n";
-            @capabilities = split(/ /, $1);
+            @capabilities = split(/ (?!(?:[^" ]|[^"] [^"])+")/, $1);
+            foreach (@capabilities) {
+                $_ = $1 if /^"(.*)"$/;
+            }
         }
         elsif($_ =~ /AUTH (.*)/) {
             logmsg "FTPD: instructed to support AUTHENTICATION command\n";