--- a/toolkit/content/tests/browser/browser_Troubleshoot.js
+++ b/toolkit/content/tests/browser/browser_Troubleshoot.js
@@ -26,18 +26,23 @@ registerCleanupFunction(function () {
   // If it's not deleted, it outlives the test and is reported as a leak.
   delete window.Troubleshoot;
 });
 
 let tests = [
 
   function snapshotSchema(done) {
     Troubleshoot.snapshot(function (snapshot) {
-      validateObject(snapshot, SNAPSHOT_SCHEMA);
-      ok(true, "The snapshot should conform to the schema.");
+      try {
+        validateObject(snapshot, SNAPSHOT_SCHEMA);
+        ok(true, "The snapshot should conform to the schema.");
+      }
+      catch (err) {
+        ok(false, err);
+      }
       done();
     });
   },
 
   function modifiedPreferences(done) {
     let prefs = [
       "javascript.troubleshoot",
       "troubleshoot.foo",