diff --git a/docs/RepositoryApi.md b/docs/RepositoryApi.md
index 72ec1eb..4fcf49e 100644
--- a/docs/RepositoryApi.md
+++ b/docs/RepositoryApi.md
@@ -11350,7 +11350,7 @@ RepositoryApi apiInstance = new RepositoryApi();
 String owner = "owner_example"; // String | owner of the repo
 String repo = "repo_example"; // String | name of the repo
 Long id = 789L; // Long | id of the hook to test
-String ref = "ref_example"; // String | The name of the commit/branch/tag. Default the repository’s default branch (usually master)
+String ref = "ref_example"; // String | The name of the commit/branch/tag, indicates which commit will be loaded to the webhook payload.
 try {
     Void result = apiInstance.repoTestHook(owner, repo, id, ref);
     System.out.println(result);
@@ -11367,7 +11367,7 @@ Name | Type | Description  | Notes
  **owner** | **String**| owner of the repo |
  **repo** | **String**| name of the repo |
  **id** | **Long**| id of the hook to test |
- **ref** | **String**| The name of the commit/branch/tag. Default the repository’s default branch (usually master) | [optional]
+ **ref** | **String**| The name of the commit/branch/tag, indicates which commit will be loaded to the webhook payload. | [optional]
 
 ### Return type
 
diff --git a/src/main/java/org/gitnex/tea4j/v2/apis/RepositoryApi.java b/src/main/java/org/gitnex/tea4j/v2/apis/RepositoryApi.java
index 25607b1..7238786 100644
--- a/src/main/java/org/gitnex/tea4j/v2/apis/RepositoryApi.java
+++ b/src/main/java/org/gitnex/tea4j/v2/apis/RepositoryApi.java
@@ -1954,8 +1954,8 @@ public interface RepositoryApi {
    * @param owner owner of the repo (required)
    * @param repo name of the repo (required)
    * @param id id of the hook to test (required)
-   * @param ref The name of the commit/branch/tag. Default the repository’s default branch (usually
-   *     master) (optional)
+   * @param ref The name of the commit/branch/tag, indicates which commit will be loaded to the
+   *     webhook payload. (optional)
    * @return Call<Void>
    */
   @POST("repos/{owner}/{repo}/hooks/{id}/tests")