diff --git a/src/core/features/course/services/module-prefetch-delegate.ts b/src/core/features/course/services/module-prefetch-delegate.ts
index 8ee32560d..cd2ede92b 100644
--- a/src/core/features/course/services/module-prefetch-delegate.ts
+++ b/src/core/features/course/services/module-prefetch-delegate.ts
@@ -1261,7 +1261,7 @@ export class CoreCourseModulePrefetchDelegateService extends CoreDelegate<CoreCo
         previousTime?: number,
     ): CourseUpdates {
         // Format the response to index it by module ID.
-        CoreUtils.arrayToObject(response.instances, 'id', result);
+        CoreUtils.arrayToObject<false | CheckUpdatesWSInstance>(response.instances, 'id', result);
 
         // Treat warnings, adding the not supported modules.
         response.warnings?.forEach((warning) => {
diff --git a/src/core/features/emulator/classes/sqlitedb.ts b/src/core/features/emulator/classes/sqlitedb.ts
index 055944f71..4be4bd69d 100644
--- a/src/core/features/emulator/classes/sqlitedb.ts
+++ b/src/core/features/emulator/classes/sqlitedb.ts
@@ -60,7 +60,7 @@ export class SQLiteDBMock extends SQLiteDB {
                 tx.executeSql(query, args, (tx, result) => {
                     if (result.rows.length <= 0) {
                         // No tables to delete, stop.
-                        resolve();
+                        resolve(null);
 
                         return;
                     }