diff --git a/.github/CONTRIBUTING.ko.md b/.github/CONTRIBUTING.ko.md
index c8f167e..7a92eea 100644
--- a/.github/CONTRIBUTING.ko.md
+++ b/.github/CONTRIBUTING.ko.md
@@ -3,11 +3,23 @@
 커뮤니티의 모든 분들의 Contribution을 환영합니다.
 [영어](https://github.com/Rapiders/react-hooks/tree/main/.github/CONTRIBUTING.md)와 한국어 중 편한 언어를 사용하면 됩니다.
 
+## 테스트 코드 정책
+
+라이브러리의 품질을 보증하기위해 다음의 정책이 적용됩니다.
+하나의 기능에 대해
+
+1. branches의 coverage는 80%를 넘어야합니다. (추후 개선 100%로 변경예정)
+2. functions의 coverage는 80%를 넘어야합니다. (추후 개선 100%로 변경예정)
+3. lines는 반드시 100%여야합니다.
+
+해당 정책을 만족하지 못하는 경우 `git push`가 이뤄지지 않습니다.
+
 ## Fork
 
 1.  기여하고 싶은 경우 우선 이 레포지토리를 fork 합니다.
-2.  작업이 완료되었다면 main 브랜치로 PR을 오픈합니다.
-3.  merge 되기 위해서는 반드시 maintainer 중 한 명이 이상의 approve를 받아야 합니다.
+2.  npm install을 진행합니다.
+3.  작업이 완료되었다면 main 브랜치로 PR을 오픈합니다.
+4.  merge 되기 위해서는 반드시 maintainer 중 한 명이 이상의 approve를 받아야 합니다.
 
 ## Issue
 
diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index 22018e4..aff67a2 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -3,11 +3,22 @@
 We welcome contribution from everyone in the community.
 you can use English and [Korean](https://github.com/Rapiders/react-hooks/tree/main/.github/CONTRIBUTING.ko.md)
 
+## Test Code Policy
+
+To ensure the quality of the library, the following policy is applied for each feature:
+
+1. Branch coverage must exceed 80%.
+2. Function coverage must exceed 80%.
+3. Line coverage must be 100%.
+
+If these requirements are not met, `git push` will not be allowed.
+
 ## Fork
 
 1. If you wish to contribute, first fork this repository.
-2. Once your work is complete, open a PR to the main branch.
-3. To be merged, it must receive at least one approval from a maintainer.
+2. npm install
+3. Once your work is complete, open a PR to the main branch.
+4. To be merged, it must receive at least one approval from a maintainer.
 
 ## Issue
 
diff --git a/.husky/pre-push b/.husky/pre-push
new file mode 100644
index 0000000..42706ac
--- /dev/null
+++ b/.husky/pre-push
@@ -0,0 +1 @@
+npm run test:coverage
\ No newline at end of file
diff --git a/jest.config.ts b/jest.config.ts
index b29931e..2e43c2f 100644
--- a/jest.config.ts
+++ b/jest.config.ts
@@ -15,4 +15,11 @@ module.exports = {
   moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, {
     prefix: '<rootDir>',
   }),
+  coverageThreshold: {
+    'src/**/*.{ts,tsx}': {
+      branches: 80,
+      functions: 80,
+      lines: 100,
+    },
+  },
 };
diff --git a/src/index.ts b/src/index.ts
index 7410274..b0e0793 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -3,7 +3,6 @@ import useAnimation from './useAnimation/useAnimation';
 import useFocusAnimation from './useFocusAnimation/useFocusAnimation';
 import useDragIndexCarousel from './useDragIndexCarousel/useDragIndexCarousel';
 import useCarousel from './useCarousel/useCarousel';
-import useScrollRatio from './useScrollRatio';
 import useInterval from './useInterval/useInterval';
 import useAfterMountEffect from './useAfterMountEffect/useAfterMountEffect';
 import useRadio from './useRadio/useRadio';
@@ -19,7 +18,6 @@ export {
   useFocusAnimation,
   useDragIndexCarousel,
   useCarousel,
-  useScrollRatio,
   useInterval,
   useAfterMountEffect,
   useRadio,
diff --git a/src/useScrollRatio.ts b/src/useScrollRatio.ts
deleted file mode 100644
index c581801..0000000
--- a/src/useScrollRatio.ts
+++ /dev/null
@@ -1,28 +0,0 @@
-import { useRef, useState } from 'react';
-
-let timer: NodeJS.Timeout | null;
-
-export default function useScrollRatio<T extends HTMLElement>() {
-  const [scrollRatio, setScrollRatio] = useState(100);
-  const ref = useRef<T | null>(null);
-
-  const handleScroll = () => {
-    if (!timer) {
-      timer = setTimeout(() => {
-        timer = null;
-
-        if (!ref.current) return;
-
-        const { scrollTop, clientHeight, scrollHeight } = ref.current;
-        setScrollRatio(((scrollTop + clientHeight) / scrollHeight) * 100);
-      }, 200);
-    }
-  };
-
-  const moveToBottom = () => {
-    if (ref.current) ref.current.scrollTop = ref.current.scrollHeight;
-    setScrollRatio(100);
-  };
-
-  return { ref, scrollRatio, handleScroll, moveToBottom };
-}