diff --git a/lighthouse-core/runner.js b/lighthouse-core/runner.js
index 29bdaadf0501..3838016f2581 100644
--- a/lighthouse-core/runner.js
+++ b/lighthouse-core/runner.js
@@ -186,9 +186,12 @@ class Runner {
     // resolution.
     .map(entry => {
       return /** @type {PerformanceEntry} */ ({
-        ...entry,
-        duration: parseFloat(entry.duration.toFixed(2)),
+        // Don't spread entry because browser PerformanceEntries can't be spread.
+        // https://github.com/GoogleChrome/lighthouse/issues/8638
         startTime: parseFloat(entry.startTime.toFixed(2)),
+        name: entry.name,
+        duration: parseFloat(entry.duration.toFixed(2)),
+        entryType: entry.entryType,
       });
     });
     const runnerEntry = timingEntries.find(e => e.name === 'lh:runner:run');