diff --git a/tests/sciencemesh/scripts/gencerts.sh b/tests/sciencemesh/scripts/gencerts.sh
index 25fa6a6b8c6..f48288b2b08 100755
--- a/tests/sciencemesh/scripts/gencerts.sh
+++ b/tests/sciencemesh/scripts/gencerts.sh
@@ -40,8 +40,8 @@ createCert revad2
 for efss in owncloud nextcloud cernbox; do
   createCert reva${efss}1
   createCert reva${efss}2
-  [[ "${efss}" -ne "cernbox" ]] && createCert ${efss}1
-  [[ "${efss}" -ne "cernbox" ]] && createCert ${efss}2
+  [ "${efss}" != "cernbox" ] && createCert ${efss}1
+  [ "${efss}" != "cernbox" ] && createCert ${efss}2
   createCert wopi${efss}1
   createCert wopi${efss}2
 done