diff --git a/bin/tests/system/conf.sh.in b/bin/tests/system/conf.sh.in
index 626913c44a..ab7d7c9480 100644
--- a/bin/tests/system/conf.sh.in
+++ b/bin/tests/system/conf.sh.in
@@ -38,4 +38,4 @@ PERL=@PERL@
 
 SUBDIRS="xfer dnssec xferquota"
 
-export NAMED DIG KEYGEN SIGNER KEYSIGNER KEYSETTOOL
+export NAMED DIG KEYGEN SIGNER KEYSIGNER KEYSETTOOL PERL SUBDIRS