diff --git a/spec/api-native-theme-spec.ts b/spec/api-native-theme-spec.ts
index 12b9951ad5..d813a5f5a2 100644
--- a/spec/api-native-theme-spec.ts
+++ b/spec/api-native-theme-spec.ts
@@ -36,6 +36,7 @@ describe('nativeTheme module', () => {
     });
 
     it('should emit the "updated" event when it is set and the resulting "shouldUseDarkColors" value changes', async () => {
+      nativeTheme.themeSource = 'light';
       let updatedEmitted = emittedOnce(nativeTheme, 'updated');
       nativeTheme.themeSource = 'dark';
       await updatedEmitted;