diff --git a/common.js b/common.js
index 324b55f..f581051 100644
--- a/common.js
+++ b/common.js
@@ -17,11 +17,16 @@ exports = module.exports = {
     getOwner: getOwner,
     getAdmin: getAdmin,
     stripeSecret: stripeSecret,
-    stripUnreachable: stripUnreachable
+    stripUnreachable: stripUnreachable,
+    regexp: regexp
 };
 
 var gEcosystem = safe.require(path.join(__dirname, '../secrets/e2e-test/ecosystem-staging.json'));
 
+function regexp(str) {
+    return new RegExp(str.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&'));
+}
+
 function cloudronDomain(filename) {
     return 't' + path.basename(filename.replace(/-/g,''), 'test.js') + '.selfhost.io';
 }
diff --git a/test/cloudron-backup-test.js b/test/cloudron-backup-test.js
index 826eac4..8571b73 100644
--- a/test/cloudron-backup-test.js
+++ b/test/cloudron-backup-test.js
@@ -81,8 +81,8 @@ describe('Cloudron backup testing', function () {
 
     it('did send mail from cloudron user', function (done) {
         imap.probe({
-            subject: new RegExp('^Hi from e2e test - ' + cloudron.fqdn() + '$'),
-            to: new RegExp('test+' + cloudron.fqdn() + '@cloudron.io'),
+            subject: common.regexp('^Hi from e2e test - ' + cloudron.fqdn() + '$'),
+            to: common.regexp('test+' + cloudron.fqdn() + '@cloudron.io'),
             body: /This release depends on you/
         }, done);
     });