diff --git a/report-app/src/app/pages/report-viewer/lighthouse-category.ts b/report-app/src/app/pages/report-viewer/lighthouse-category.ts
index 6e0791a..ebe826c 100644
--- a/report-app/src/app/pages/report-viewer/lighthouse-category.ts
+++ b/report-app/src/app/pages/report-viewer/lighthouse-category.ts
@@ -24,7 +24,14 @@ import {Score} from '../../shared/score/score';
       @for (audit of audits; track audit.id) {
         <li>
           @if (audit.score != null) {
-            <score size="tiny" [total]="audit.score" [max]="1"/>
+            @if (audit.scoreDisplayMode === 'binary') {
+              @let isPass = audit.score === 1;
+              <span class="status-text material-symbols-outlined {{isPass ? 'success' : 'error'}}">
+                {{isPass ? 'check' : 'close'}}
+              </span>
+            } @else {
+              <score size="tiny" [total]="audit.score" [max]="1"/>
+            }
           }
           {{audit.title}}{{audit.displayValue ? ': ' + audit.displayValue : ''}}
 
diff --git a/runner/workers/serve-testing/lighthouse.ts b/runner/workers/serve-testing/lighthouse.ts
index be9a8cb..fabcb8a 100644
--- a/runner/workers/serve-testing/lighthouse.ts
+++ b/runner/workers/serve-testing/lighthouse.ts
@@ -38,7 +38,19 @@ export async function getLighthouseData(
     const isAllowedDisplayMode = displayMode === 'binary' || displayMode === 'numeric';
 
     if (audit.score != null && isAllowedType && isAllowedDisplayMode) {
-      availableAudits.set(audit.id, audit);
+      availableAudits.set(audit.id, {
+        // Only capture the properties we care about in order to keep
+        // the report size small and avoid serialization errors.
+        id: audit.id,
+        score: audit.score,
+        title: audit.title,
+        displayValue: audit.displayValue ?? null,
+        description: audit.description,
+        explanation: audit.explanation ?? null,
+        scoreDisplayMode: displayMode,
+        numericValue: audit.numericValue ?? null,
+        numericUnit: audit.numericUnit ?? null,
+      });
     }
   }
 
diff --git a/runner/workers/serve-testing/worker-types.ts b/runner/workers/serve-testing/worker-types.ts
index b030c0b..6adb5ce 100644
--- a/runner/workers/serve-testing/worker-types.ts
+++ b/runner/workers/serve-testing/worker-types.ts
@@ -66,7 +66,17 @@ export type ServeTestingWorkerResponseMessage =
   | ServeTestingProgressLogMessage
   | ServeTestingResultMessage;
 
-export type LighthouseAudit = LighthouseRunnerResult['lhr']['audits']['x']; // Lighthouse doesn't export this so we need to dig for it.
+export interface LighthouseAudit {
+  id: string;
+  score: number | null;
+  title: string;
+  displayValue: string | null;
+  description: string | null;
+  explanation: string | null;
+  scoreDisplayMode: 'numeric' | 'binary';
+  numericValue: number | null;
+  numericUnit: string | null;
+}
 
 export interface LighthouseCategory {
   id: string;