--- a/mobile/android/tests/background/junit4/src/org/mozilla/android/sync/net/test/TestGlobalSession.java
+++ b/mobile/android/tests/background/junit4/src/org/mozilla/android/sync/net/test/TestGlobalSession.java
@@ -391,17 +391,17 @@ public class TestGlobalSession {
     session.enginesToUpdate.clear();
 
     // Set enabledEngines in meta/global, including a "new engine."
     String[] origEngines = new String[] { "bookmarks", "clients", "forms", "history", "tabs", "new-engine" };
 
     ExtendedJSONObject origEnginesJSONObject = new ExtendedJSONObject();
     for (String engineName : origEngines) {
       EngineSettings mockEngineSettings = new EngineSettings(Utils.generateGuid(), Integer.valueOf(0));
-      origEnginesJSONObject.put(engineName, mockEngineSettings);
+      origEnginesJSONObject.put(engineName, mockEngineSettings.toJSONObject());
     }
     session.config.metaGlobal.setEngines(origEnginesJSONObject);
 
     // Engines to remove.
     String[] toRemove = new String[] { "bookmarks", "tabs" };
     for (String name : toRemove) {
       session.removeEngineFromMetaGlobal(name);
     }