diff --git a/js/server/modules/@arangodb/testing.js b/js/server/modules/@arangodb/testing.js
index 0ee1a3b79f..b15b438810 100644
--- a/js/server/modules/@arangodb/testing.js
+++ b/js/server/modules/@arangodb/testing.js
@@ -1103,7 +1103,7 @@ function performTests(options, testList, testname, remote) {
 
         first = false;
         if (options.loopEternal) {
-          if (options.loopSleepWhen % loopCount === 0) {
+          if (loopCount % options.loopSleepWhen === 0) {
             print("sleeping...");
             sleep(options.loopSleepSec);
             print("continuing.");