diff --git a/plugins/c9.vfs.extend/collab-server.js b/plugins/c9.vfs.extend/collab-server.js
index 5693319a..f7a1fbe4 100644
--- a/plugins/c9.vfs.extend/collab-server.js
+++ b/plugins/c9.vfs.extend/collab-server.js
@@ -1952,10 +1952,11 @@ function handleLeaveDocument(userIds, client, data) {
     var docId = data.docId;
     var userId = userIds.userId;
     var clientId = userIds.clientId;
-    if (!documents[docId] || !documents[docId][clientId] || !client.openDocIds[docId])
+    if (!documents[docId] || !documents[docId][clientId] || !client.openDocIds[docId]) {
         return console.error("[vfs-collab] Trying to leave a non-member document!",
             docId, clientId, documents[docId] && Object.keys(documents[docId]), Object.keys(client.openDocIds),
             Object.keys(documents), Object.keys(clients));
+    }
     delete client.openDocIds[docId];
     console.error("[vfs-collab]", clientId, "is leaving document", docId);
     delete documents[docId][clientId];
@@ -2935,3 +2936,6 @@ lock("abc", function () {
     }, 100);
 });
 */
+
+// Exported for testing
+exports.operation = operations;
\ No newline at end of file