diff --git a/bin/tests/system/dlzexternal/tests.sh b/bin/tests/system/dlzexternal/tests.sh
index b7cc3bbb26..54b7da82e0 100644
--- a/bin/tests/system/dlzexternal/tests.sh
+++ b/bin/tests/system/dlzexternal/tests.sh
@@ -54,8 +54,8 @@ status=`expr $status + $ret`
 
 echo "I:testing passing client info into DLZ driver"
 ret=0
-out=`$DIG $DIGOPTS +short -t txt -q source-addr.example.nil`
-addr=`eval echo $out | cut -f1 -d'#'`
+out=`$DIG $DIGOPTS +short -t txt -q source-addr.example.nil | grep -v '^;'`
+addr=`eval echo "$out" | cut -f1 -d'#'`
 [ "$addr" = "10.53.0.1" ] || ret=1
 [ "$ret" -eq 0 ] || echo "I:failed"
 status=`expr $status + $ret`