diff --git a/core/audits/server-response-time.js b/core/audits/server-response-time.js
index 037f4b149fb5..5cf828a6c262 100644
--- a/core/audits/server-response-time.js
+++ b/core/audits/server-response-time.js
@@ -17,8 +17,6 @@ const UIStrings = {
   description: 'Keep the server response time for the main document short because all other requests depend on it. [Learn more about the Time to First Byte metric](https://developer.chrome.com/docs/lighthouse/performance/time-to-first-byte/).',
   /** Used to summarize the total Server Response Time duration for the primary HTML response. The `{timeInMs}` placeholder will be replaced with the time duration, shown in milliseconds (e.g. 210 ms) */
   displayValue: `Root document took {timeInMs, number, milliseconds}\xa0ms`,
-  /** A message displayed in a Lighthouse audit result warning that the server response time could not be determined. */
-  missingTimingWarning: 'Missing timing information needed to determine the server response time',
 };
 
 const str_ = i18n.createIcuMessageFn(import.meta.url, UIStrings);
@@ -49,7 +47,7 @@ class ServerResponseTime extends Audit {
    */
   static calculateResponseTime(record) {
     // Lightrider does not have timings for sendEnd, but we do have this timing which should be
-    // close.
+    // close to the response time.
     if (global.isLightrider && record.lrStatistics) return record.lrStatistics.requestMs;
 
     if (!record.timing) return null;
@@ -69,11 +67,7 @@ class ServerResponseTime extends Audit {
 
     const responseTime = ServerResponseTime.calculateResponseTime(mainResource);
     if (responseTime === null) {
-      return {
-        score: 0,
-        runWarnings: [str_(UIStrings.missingTimingWarning)],
-        notApplicable: true,
-      };
+      throw new Error('no timing found for main resource');
     }
 
     const passed = responseTime < TOO_SLOW_THRESHOLD_MS;
diff --git a/shared/localization/locales/en-US.json b/shared/localization/locales/en-US.json
index ccb07f82b06c..f6ee0981dca8 100644
--- a/shared/localization/locales/en-US.json
+++ b/shared/localization/locales/en-US.json
@@ -1409,9 +1409,6 @@
   "core/audits/server-response-time.js | failureTitle": {
     "message": "Reduce initial server response time"
   },
-  "core/audits/server-response-time.js | missingTimingWarning": {
-    "message": "Missing timing information needed to determine the server response time"
-  },
   "core/audits/server-response-time.js | title": {
     "message": "Initial server response time was short"
   },
diff --git a/shared/localization/locales/en-XL.json b/shared/localization/locales/en-XL.json
index c2e14964dfb7..bafb884358c3 100644
--- a/shared/localization/locales/en-XL.json
+++ b/shared/localization/locales/en-XL.json
@@ -1409,9 +1409,6 @@
   "core/audits/server-response-time.js | failureTitle": {
     "message": "R̂éd̂úĉé îńît́îál̂ śêŕv̂ér̂ ŕêśp̂ón̂śê t́îḿê"
   },
-  "core/audits/server-response-time.js | missingTimingWarning": {
-    "message": "M̂íŝśîńĝ t́îḿîńĝ ín̂f́ôŕm̂át̂íôń n̂éêd́êd́ t̂ó d̂ét̂ér̂ḿîńê t́ĥé ŝér̂v́êŕ r̂éŝṕôńŝé t̂ím̂é"
-  },
   "core/audits/server-response-time.js | title": {
     "message": "Îńît́îál̂ śêŕv̂ér̂ ŕêśp̂ón̂śê t́îḿê ẃâś ŝh́ôŕt̂"
   },