diff --git a/testssl.sh b/testssl.sh
index 2ae67c1..141abed 100755
--- a/testssl.sh
+++ b/testssl.sh
@@ -6571,9 +6571,9 @@ certificate_info() {
 
      caa_node="$NODE"
      caa=""
-     while ( [[ -z "$caa" ]] && [[ "$caa_node" != "." ]] ); do
+     while ( [[ -z "$caa" ]] &&  [[ ! -z "$caa_node" ]] ); do
           caa="$(get_caa_rr_record $caa_node)"
-          caa_node+="."
+          [[ $caa_node =~ '.'$ ]] || caa_node+="."
           caa_node=${caa_node#*.}
      done