diff --git a/.changelog/6048-fix-test-speech-helper-errors.md b/.changelog/6048-fix-test-speech-helper-errors.md
new file mode 100644
index 0000000000..93b09a49b5
--- /dev/null
+++ b/.changelog/6048-fix-test-speech-helper-errors.md
@@ -0,0 +1,3 @@
+### Fixed
+
+- 👷🏻 Fixed speech test helpers not failing the test when its callback throws, in PR [#6048](https://github.com/microsoft/BotFramework-WebChat/pull/6048), by [@OEvgeny](https://github.com/OEvgeny)
diff --git a/__tests__/assets/esm/speech/speechPageObjects.js b/__tests__/assets/esm/speech/speechPageObjects.js
index 45d05f623b..aa316ff48b 100644
--- a/__tests__/assets/esm/speech/speechPageObjects.js
+++ b/__tests__/assets/esm/speech/speechPageObjects.js
@@ -43,18 +43,32 @@ function createWebSpeechPonyfill() {
  */
 async function actSpeakOnce({ speechSynthesis }, actor, speakActor) {
   let lastUtterance;
+  let rejectSpeak;
+  let spoken;
 
-  spyOn(speechSynthesis, 'speak').mockImplementationOnce(async utterance => {
+  // Rejects as soon as speakActor throws, so an actor waiting for the utterance's "end" event does not hang.
+  const speakFailed = new Promise((_, reject) => {
+    rejectSpeak = reject;
+  });
+
+  spyOn(speechSynthesis, 'speak').mockImplementationOnce(utterance => {
     lastUtterance = utterance;
 
-    utterance.dispatchEvent(new SpeechSynthesisEvent('start', { utterance }));
+    spoken = (async () => {
+      utterance.dispatchEvent(new SpeechSynthesisEvent('start', { utterance }));
 
-    await speakActor?.(utterance);
+      await speakActor?.(utterance);
 
-    utterance.dispatchEvent(new SpeechSynthesisEvent('end', { utterance }));
+      utterance.dispatchEvent(new SpeechSynthesisEvent('end', { utterance }));
+    })();
+
+    spoken.catch(rejectSpeak);
   });
 
-  await actor();
+  await Promise.race([actor(), speakFailed]);
+
+  // Waits for speakActor, if speak() was called.
+  await spoken;
 
   return lastUtterance;
 }
@@ -83,9 +97,8 @@ async function actSpeak({ speechSynthesis }, actor, speakActor) {
   return Object.freeze(utterances);
 }
 
-function actRecognizeOnce(ponyfill, actor, recognizeActor) {
-  // eslint-disable-next-line no-async-promise-executor
-  return new Promise(async resolve => {
+async function actRecognizeOnce(ponyfill, actor, recognizeActor) {
+  const recognized = new Promise((resolve, reject) => {
     const OriginalSpeechRecognition = ponyfill.SpeechRecognition;
 
     spyOn(ponyfill, 'SpeechRecognition').mockImplementationOnce(() => {
@@ -169,7 +182,7 @@ function actRecognizeOnce(ponyfill, actor, recognizeActor) {
         end();
       });
 
-      spyOn(speechRecognition, 'start').mockImplementationOnce(async () => {
+      const recognize = async () => {
         // Like a browser, events come after start() returned and "starting" is painted: start() is called from an effect,
         // events inside it would render "starting" and "dictating" in the same frame on React 18 and later.
         await new Promise(resolve => requestAnimationFrame(() => setTimeout(resolve, 0)));
@@ -199,15 +212,18 @@ function actRecognizeOnce(ponyfill, actor, recognizeActor) {
             finalizedResult
           });
         }
+      };
 
-        resolve();
+      spyOn(speechRecognition, 'start').mockImplementationOnce(() => {
+        recognize().then(resolve, reject);
       });
 
       return speechRecognition;
     });
-
-    await actor();
   });
+
+  // Waits for both actors, so an error thrown by either one rejects.
+  await Promise.all([actor(), recognized]);
 }
 
 async function sendMessageViaMicrophone(speechPonyfill, text) {
diff --git a/__tests__/html2/hooks/useStartDictate.html b/__tests__/html2/hooks/useStartDictate.html
index 92f8d11f4a..75f3a763b2 100644
--- a/__tests__/html2/hooks/useStartDictate.html
+++ b/__tests__/html2/hooks/useStartDictate.html
@@ -55,7 +55,7 @@
           `[data-testid="${testIds.sendBoxMicrophoneButton}"]`
         )?.parentElement;
 
-        actRecognizeOnce(
+        await actRecognizeOnce(
           ponyfill,
           async () => {
             startDictate();
diff --git a/__tests__/html2/hooks/useStopDictate.html b/__tests__/html2/hooks/useStopDictate.html
index 1c35745e0b..4d613d83dd 100644
--- a/__tests__/html2/hooks/useStopDictate.html
+++ b/__tests__/html2/hooks/useStopDictate.html
@@ -51,7 +51,7 @@
 
         await pageConditions.uiConnected();
 
-        actRecognizeOnce(
+        await actRecognizeOnce(
           ponyfill,
           async () => {
             await host.click(document.querySelector(`[data-testid="${testIds.sendBoxMicrophoneButton}"]`));