diff --git a/tests/k6/common/sentinel.js b/tests/k6/common/sentinel.js
index 2c2a7f732..6cf789369 100644
--- a/tests/k6/common/sentinel.js
+++ b/tests/k6/common/sentinel.js
@@ -11,8 +11,11 @@ export default function () {
         let hasNextPage = false;
         let continuationToken = "";
         let dialogIdsToPurge = [];
+        let oneHourAgo = new Date();
+        oneHourAgo.setHours(oneHourAgo.getHours() - 1);
+        let createdAfter = oneHourAgo.toISOString();
         do {
-            let r = getSO('dialogs/?Limit=1000&Search=' + sentinelValue + continuationToken, null, tokenOptions);
+            let r = getSO('dialogs/?CreatedAfter=' + createdAfter + '&Limit=1000&Search=' + sentinelValue + continuationToken, null, tokenOptions);
             expectStatusFor(r).to.equal(200);
             expect(r, 'response').to.have.validJsonBody();
             let response = r.json();