diff --git a/ci/tasks/check-dns.rb b/ci/tasks/check-dns.rb
index b6d19d0..f48b559 100755
--- a/ci/tasks/check-dns.rb
+++ b/ci/tasks/check-dns.rb
@@ -22,12 +22,14 @@ check_domain(domain)
 puts "[PASS] #{domain} basic check ('DOMAIN' variable set & not empty)"
 
 whois_nameservers = get_whois_nameservers(domain)
-#whois_nameservers = [ 'ns-aws.nono.com', 'ns-he.nono.com' ] # testing
+#whois_nameservers = [ 'ns-aws.nono.io', 'ns-he.nono.io', 'ns-gce.nono.io' ] # testing
+# whois records don't have trail '.'; NS records do; add trailing '.'
+whois_nameservers.map { |ns| ns << '.' }
 puts "[PASS] #{domain} has whois entry with nameservers #{whois_nameservers.join(", ")}"
 
 whois_nameservers.each do |whois_nameserver|
   dig = `dig +short ns sslip.io @#{whois_nameserver}`
-	dig_nameservers = dig.split(/\n+/)
+  dig_nameservers = dig.split(/\n+/)
   if ( whois_nameservers.sort == dig_nameservers.sort )
     puts "[PASS] #{whois_nameserver}'s NS records match whois"
   else