diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteShopExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteShopExtensions.cs
index fbda172e..eeba4c9e 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteShopExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteShopExtensions.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Net.Http;
 using System.Threading;
 using System.Threading.Tasks;
@@ -1036,6 +1036,26 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
 
             return await client.SendRequestWithJsonAsync<Models.ShopECAftersaleUploadCertificatesResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
         }
+
+        /// <summary>
+        /// <para>异步调用 [POST] /shop/ecaftersale/merchanttest 接口。</para>
+        /// <para>REF: https://developers.weixin.qq.com/miniprogram/dev/platform-capabilities/business-capabilities/ministore/minishopopencomponent2/API/aftersale/merchanttest.html </para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.ShopECAftersaleMerchantTestResponse> ExecuteShopECAftersaleMerchantTestAsync(this WechatApiClient client, Models.ShopECAftersaleMerchantTestRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            IFlurlRequest flurlReq = client
+                .CreateRequest(request, HttpMethod.Post, "shop", "ecaftersale", "merchanttest")
+                .SetQueryParam("access_token", request.AccessToken);
+
+            return await client.SendRequestWithJsonAsync<Models.ShopECAftersaleMerchantTestResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
+        }
         #endregion
 
         #region Coupon
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Shop/ECAftersale/ShopECAftersaleMerchantTestRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Shop/ECAftersale/ShopECAftersaleMerchantTestRequest.cs
new file mode 100644
index 00000000..653c1d28
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Shop/ECAftersale/ShopECAftersaleMerchantTestRequest.cs
@@ -0,0 +1,29 @@
+namespace SKIT.FlurlHttpClient.Wechat.Api.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /shop/ecaftersale/merchanttest 接口的请求。</para>
+    /// </summary>
+    public class ShopECAftersaleMerchantTestRequest : WechatApiRequest, IInferable<ShopECAftersaleMerchantTestRequest, ShopECAftersaleMerchantTestResponse>
+    {
+        /// <summary>
+        /// 获取或设置售后单号。与字段 <see cref="OutAftersaleOrderId"/> 二选一。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("aftersale_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("aftersale_id")]
+        public long? AftersaleOrderId { get; set; }
+
+        /// <summary>
+        /// 获取或设置商家自定义售后单号。与字段 <see cref="AftersaleOrderId"/> 二选一。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_aftersale_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_aftersale_id")]
+        public string? OutAftersaleOrderId { get; set; }
+
+        /// <summary>
+        /// 获取或设置操作类型。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("operation")]
+        [System.Text.Json.Serialization.JsonPropertyName("operation")]
+        public string Operation { get; set; } = string.Empty;
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Shop/ECAftersale/ShopECAftersaleMerchantTestResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Shop/ECAftersale/ShopECAftersaleMerchantTestResponse.cs
new file mode 100644
index 00000000..2beaad52
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Shop/ECAftersale/ShopECAftersaleMerchantTestResponse.cs
@@ -0,0 +1,9 @@
+namespace SKIT.FlurlHttpClient.Wechat.Api.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /shop/ecaftersale/merchanttest 接口的响应。</para>
+    /// </summary>
+    public class ShopECAftersaleMerchantTestResponse : WechatApiResponse
+    {
+    }
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/ECAftersale/ShopECAftersaleMerchantTestRequest.json b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/ECAftersale/ShopECAftersaleMerchantTestRequest.json
new file mode 100644
index 00000000..73a98705
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Shop/ECAftersale/ShopECAftersaleMerchantTestRequest.json
@@ -0,0 +1,4 @@
+{
+    "operation": "aftersale_merchant_confirm_receipt_overdue",
+    "out_aftersale_id": "xxxxxx"
+}