1 files changed, 12 insertions, 8 deletions
diff --git a/browser/components/preferences/tests/browser_applications_selection.js b/browser/components/preferences/tests/browser_applications_selection.js
index 683ce76a89..23f0e00af8 100644
--- a/browser/components/preferences/tests/browser_applications_selection.js
+++ b/browser/components/preferences/tests/browser_applications_selection.js
@@ -335,10 +335,12 @@ add_task(async function sortingCheck() {
       "Number of items should not change."
     );
     for (let i = 0; i < siteItems.length - 1; ++i) {
-      let aType = siteItems[i].getAttribute("actionDescription").toLowerCase();
-      let bType = siteItems[i + 1]
-        .getAttribute("actionDescription")
-        .toLowerCase();
+      let aType = (
+        siteItems[i].getAttribute("actionDescription") || ""
+      ).toLowerCase();
+      let bType = (
+        siteItems[i + 1].getAttribute("actionDescription") || ""
+      ).toLowerCase();
       let result = 0;
       if (aType > bType) {
         result = 1;
@@ -375,10 +377,12 @@ add_task(async function sortingCheck() {
       "Number of items should not change."
     );
     for (let i = 0; i < siteItems.length - 1; ++i) {
-      let aType = siteItems[i].getAttribute("typeDescription").toLowerCase();
-      let bType = siteItems[i + 1]
-        .getAttribute("typeDescription")
-        .toLowerCase();
+      let aType = (
+        siteItems[i].getAttribute("typeDescription") || ""
+      ).toLowerCase();
+      let bType = (
+        siteItems[i + 1].getAttribute("typeDescription") || ""
+      ).toLowerCase();
       let result = 0;
       if (aType > bType) {
         result = 1;