diff --git a/src/tests/frontend/easysync-helper.js b/src/tests/frontend/easysync-helper.js
index 6b4bfc959..b4f770963 100644
--- a/src/tests/frontend/easysync-helper.js
+++ b/src/tests/frontend/easysync-helper.js
@@ -48,7 +48,7 @@ exports.randomMultiline = randomMultiline;
 
 const randomStringOperation = (numCharsLeft) => {
   let result;
-  switch (randInt(9)) {
+  switch (randInt(11)) {
     case 0:
     {
       // insert char