diff --git a/toolkit/components/telemetry/tests/unit/test_TelemetryPing.js b/toolkit/components/telemetry/tests/unit/test_TelemetryPing.js
index 983e62ac8615..e24914ab2d1b 100644
--- a/toolkit/components/telemetry/tests/unit/test_TelemetryPing.js
+++ b/toolkit/components/telemetry/tests/unit/test_TelemetryPing.js
@@ -145,8 +145,8 @@ function checkPayloadInfo(payload, reason) {
 function checkPersistedHistograms(request, response) {
   let payload = decodeRequestPayload(request);
 
-  checkPayloadInfo(payload, "saved-session");
   httpserver.registerPathHandler(PATH, checkHistograms);
+  checkPayloadInfo(payload, "saved-session");
 }
 
 function checkHistograms(request, response) {