diff --git a/browser/modules/test/browser/browser_UsageTelemetry_content.js b/browser/modules/test/browser/browser_UsageTelemetry_content.js
index 4af290a5133f..845040ab632c 100644
--- a/browser/modules/test/browser/browser_UsageTelemetry_content.js
+++ b/browser/modules/test/browser/browser_UsageTelemetry_content.js
@@ -81,7 +81,7 @@ add_task(async function test_context_menu() {
 
   // Also check events.
   let events = Services.telemetry.snapshotBuiltinEvents(Ci.nsITelemetry.DATASET_RELEASE_CHANNEL_OPTIN, false);
-  events = (events.default || []).filter(e => e[1] == "navigation" && e[2] == "search");
+  events = (events.parent || []).filter(e => e[1] == "navigation" && e[2] == "search");
   checkEvents(events, [["navigation", "search", "contextmenu", null, {engine: "other-MozSearch"}]]);
 
   contextMenu.hidePopup();
@@ -117,7 +117,7 @@ add_task(async function test_about_newtab() {
 
   // Also check events.
   let events = Services.telemetry.snapshotBuiltinEvents(Ci.nsITelemetry.DATASET_RELEASE_CHANNEL_OPTIN, false);
-  events = (events.default || []).filter(e => e[1] == "navigation" && e[2] == "search");
+  events = (events.parent || []).filter(e => e[1] == "navigation" && e[2] == "search");
   checkEvents(events, [["navigation", "search", "about_newtab", "enter", {engine: "other-MozSearch"}]]);
 
   await BrowserTestUtils.removeTab(tab);
diff --git a/browser/modules/test/browser/browser_UsageTelemetry_content_aboutHome.js b/browser/modules/test/browser/browser_UsageTelemetry_content_aboutHome.js
index 1320c7144684..eef3b6f5078c 100644
--- a/browser/modules/test/browser/browser_UsageTelemetry_content_aboutHome.js
+++ b/browser/modules/test/browser/browser_UsageTelemetry_content_aboutHome.js
@@ -81,7 +81,7 @@ add_task(async function test_abouthome_simpleQuery() {
 
   // Also check events.
   let events = Services.telemetry.snapshotBuiltinEvents(Ci.nsITelemetry.DATASET_RELEASE_CHANNEL_OPTIN, false);
-  events = (events.default || []).filter(e => e[1] == "navigation" && e[2] == "search");
+  events = (events.parent || []).filter(e => e[1] == "navigation" && e[2] == "search");
   checkEvents(events, [["navigation", "search", "about_home", "enter", {engine: "other-MozSearch"}]]);
 
   await BrowserTestUtils.removeTab(tab);
diff --git a/browser/modules/test/browser/browser_UsageTelemetry_searchbar.js b/browser/modules/test/browser/browser_UsageTelemetry_searchbar.js
index ff88f7fe1565..2f79c96f16b6 100644
--- a/browser/modules/test/browser/browser_UsageTelemetry_searchbar.js
+++ b/browser/modules/test/browser/browser_UsageTelemetry_searchbar.js
@@ -129,7 +129,7 @@ add_task(async function test_plainQuery() {
 
   // Also check events.
   let events = Services.telemetry.snapshotBuiltinEvents(Ci.nsITelemetry.DATASET_RELEASE_CHANNEL_OPTIN, false);
-  events = (events.default || []).filter(e => e[1] == "navigation" && e[2] == "search");
+  events = (events.parent || []).filter(e => e[1] == "navigation" && e[2] == "search");
   checkEvents(events, [["navigation", "search", "searchbar", "enter", {engine: "other-MozSearch"}]]);
 
   // Check the histograms as well.
@@ -173,7 +173,7 @@ add_task(async function test_oneOff_enter() {
 
   // Also check events.
   let events = Services.telemetry.snapshotBuiltinEvents(Ci.nsITelemetry.DATASET_RELEASE_CHANNEL_OPTIN, false);
-  events = (events.default || []).filter(e => e[1] == "navigation" && e[2] == "search");
+  events = (events.parent || []).filter(e => e[1] == "navigation" && e[2] == "search");
   checkEvents(events, [["navigation", "search", "searchbar", "oneoff", {engine: "other-MozSearch2"}]]);
 
   // Check the histograms as well.
@@ -298,7 +298,7 @@ add_task(async function test_suggestion_click() {
 
   // Also check events.
   let events = Services.telemetry.snapshotBuiltinEvents(Ci.nsITelemetry.DATASET_RELEASE_CHANNEL_OPTIN, false);
-  events = (events.default || []).filter(e => e[1] == "navigation" && e[2] == "search");
+  events = (events.parent || []).filter(e => e[1] == "navigation" && e[2] == "search");
   checkEvents(events, [["navigation", "search", "searchbar", "suggestion", {engine: searchEngineId}]]);
 
   // Check the histograms as well.
diff --git a/browser/modules/test/browser/browser_UsageTelemetry_urlbar.js b/browser/modules/test/browser/browser_UsageTelemetry_urlbar.js
index df93864f9bbb..20b70c978c4b 100644
--- a/browser/modules/test/browser/browser_UsageTelemetry_urlbar.js
+++ b/browser/modules/test/browser/browser_UsageTelemetry_urlbar.js
@@ -138,7 +138,7 @@ add_task(async function test_simpleQuery() {
 
   // Also check events.
   let events = Services.telemetry.snapshotBuiltinEvents(Ci.nsITelemetry.DATASET_RELEASE_CHANNEL_OPTIN, false);
-  events = (events.default || []).filter(e => e[1] == "navigation" && e[2] == "search");
+  events = (events.parent || []).filter(e => e[1] == "navigation" && e[2] == "search");
   checkEvents(events, [["navigation", "search", "urlbar", "enter", {engine: "other-MozSearch"}]]);
 
   // Check the histograms as well.
@@ -197,7 +197,7 @@ add_task(async function test_searchAlias() {
 
   // Also check events.
   let events = Services.telemetry.snapshotBuiltinEvents(Ci.nsITelemetry.DATASET_RELEASE_CHANNEL_OPTIN, false);
-  events = (events.default || []).filter(e => e[1] == "navigation" && e[2] == "search");
+  events = (events.parent || []).filter(e => e[1] == "navigation" && e[2] == "search");
   checkEvents(events, [["navigation", "search", "urlbar", "alias", {engine: "other-MozSearch"}]]);
 
   // Check the histograms as well.
@@ -261,7 +261,7 @@ add_task(async function test_oneOff_enter() {
 
   // Also check events.
   let events = Services.telemetry.snapshotBuiltinEvents(Ci.nsITelemetry.DATASET_RELEASE_CHANNEL_OPTIN, false);
-  events = (events.default || []).filter(e => e[1] == "navigation" && e[2] == "search");
+  events = (events.parent || []).filter(e => e[1] == "navigation" && e[2] == "search");
   checkEvents(events, [["navigation", "search", "urlbar", "oneoff", {engine: "other-MozSearch"}]]);
 
   // Check the histograms as well.
@@ -408,7 +408,7 @@ add_task(async function test_suggestion_click() {
 
   // Also check events.
   let events = Services.telemetry.snapshotBuiltinEvents(Ci.nsITelemetry.DATASET_RELEASE_CHANNEL_OPTIN, false);
-  events = (events.default || []).filter(e => e[1] == "navigation" && e[2] == "search");
+  events = (events.parent || []).filter(e => e[1] == "navigation" && e[2] == "search");
   checkEvents(events, [["navigation", "search", "urlbar", "suggestion", {engine: searchEngineId}]]);
 
   // Check the histograms as well.
diff --git a/browser/modules/test/browser/head.js b/browser/modules/test/browser/head.js
index 594584b5180b..4080d79b5dbd 100644
--- a/browser/modules/test/browser/head.js
+++ b/browser/modules/test/browser/head.js
@@ -100,8 +100,8 @@ function checkKeyedHistogram(h, key, expectedValue) {
  */
 function getParentProcessScalars(aChannel, aKeyed = false, aClear = false) {
   const scalars = aKeyed ?
-    Services.telemetry.snapshotKeyedScalars(aChannel, aClear)["default"] :
-    Services.telemetry.snapshotScalars(aChannel, aClear)["default"];
+    Services.telemetry.snapshotKeyedScalars(aChannel, aClear)["parent"] :
+    Services.telemetry.snapshotScalars(aChannel, aClear)["parent"];
   return scalars || {};
 }