diff --git a/report/renderer/report-ui-features.js b/report/renderer/report-ui-features.js
index 8c41aaac33dd..b54ebb1a9691 100644
--- a/report/renderer/report-ui-features.js
+++ b/report/renderer/report-ui-features.js
@@ -85,7 +85,7 @@ export class ReportUIFeatures {
       const cat = lhr.categories[id];
       return cat && cat.score === 1;
     });
-    if (scoresAll100) {
+    if (scoresAll100 && !this._opts.disableAutoDarkModeAndFireworks) {
       turnOffTheLights = true;
       this._enableFireworks();
     }