diff --git a/src/lesson/presentation/hooks/useCountDown.ts b/src/lesson/presentation/hooks/useCountDown.ts
index aa9e211a..802ce5c3 100644
--- a/src/lesson/presentation/hooks/useCountDown.ts
+++ b/src/lesson/presentation/hooks/useCountDown.ts
@@ -1,22 +1,22 @@
-import {useState} from 'react';
+import {useCallback, useState} from 'react';
 
 export const useCountDown = (countDownTime: number) => {
   const [time, setTime] = useState(countDownTime);
 
-  const start = () => {
+  const start = useCallback(() => {
     const interval = setInterval(() => {
       setTime(prev => (prev < 0 ? 0 : prev - 1));
     }, 1000);
     return interval;
-  };
+  }, [countDownTime]);
 
-  const stop = (interval: NodeJS.Timeout) => {
+  const stop = useCallback((interval: NodeJS.Timeout) => {
     clearInterval(interval);
-  };
+  }, [countDownTime]);
 
-  const reset = () => {
+  const reset = useCallback(() => {
     setTime(countDownTime);
-  };
+  }, [countDownTime]);
 
   return {time, start, stop, reset, setTime};
 };
diff --git a/src/lesson/presentation/hooks/useSettingLesson.ts b/src/lesson/presentation/hooks/useSettingLesson.ts
index bff66dda..fc043788 100644
--- a/src/lesson/presentation/hooks/useSettingLesson.ts
+++ b/src/lesson/presentation/hooks/useSettingLesson.ts
@@ -160,7 +160,8 @@ export const useSettingLesson = ({
     setIsSubmitting(true);
 
     try {
-      resetLearning();
+      intervalRef.current && stop(intervalRef.current);
+      intervalRef.current = start();
       resetTesting();
       stopRecord();
       clearSpeechResult();