diff --git a/src/Mollie.Api/Client/Abstract/ICaptureClient.cs b/src/Mollie.Api/Client/Abstract/ICaptureClient.cs
index da0623a0..1bb9f70d 100644
--- a/src/Mollie.Api/Client/Abstract/ICaptureClient.cs
+++ b/src/Mollie.Api/Client/Abstract/ICaptureClient.cs
@@ -10,6 +10,6 @@ public interface ICaptureClient : IBaseMollieClient {
         Task<CaptureResponse> GetCaptureAsync(UrlObjectLink<CaptureResponse> url);
         Task<ListResponse<CaptureResponse>> GetCaptureListAsync(string paymentId, bool testmode = false);
         Task<ListResponse<CaptureResponse>> GetCaptureListAsync(UrlObjectLink<ListResponse<CaptureResponse>> url);
-        Task<CaptureResponse> CreateCapture(string paymentId, CaptureRequest captureRequest, bool testmode = false);
+        Task<CaptureResponse> CreateCapture(string paymentId, CaptureRequest captureRequest);
     }
 }
diff --git a/src/Mollie.Api/Client/CaptureClient.cs b/src/Mollie.Api/Client/CaptureClient.cs
index dae76be7..554fa52e 100644
--- a/src/Mollie.Api/Client/CaptureClient.cs
+++ b/src/Mollie.Api/Client/CaptureClient.cs
@@ -42,10 +42,9 @@ public async Task<ListResponse<CaptureResponse>> GetCaptureListAsync(UrlObjectLi
             return await GetAsync(url).ConfigureAwait(false);
         }
 
-        public async Task<CaptureResponse> CreateCapture(string paymentId, CaptureRequest captureRequest, bool testmode = false) {
+        public async Task<CaptureResponse> CreateCapture(string paymentId, CaptureRequest captureRequest) {
             ValidateRequiredUrlParameter(nameof(paymentId), paymentId);
-            var queryParameters = BuildQueryParameters(testmode);
-            return await PostAsync<CaptureResponse>($"payments/{paymentId}/captures{queryParameters.ToQueryString()}", captureRequest)
+            return await PostAsync<CaptureResponse>($"payments/{paymentId}/captures", captureRequest)
                 .ConfigureAwait(false);
         }
 
diff --git a/src/Mollie.Api/Models/Capture/Request/CaptureRequest.cs b/src/Mollie.Api/Models/Capture/Request/CaptureRequest.cs
index 73bd1433..42644ab3 100644
--- a/src/Mollie.Api/Models/Capture/Request/CaptureRequest.cs
+++ b/src/Mollie.Api/Models/Capture/Request/CaptureRequest.cs
@@ -20,13 +20,18 @@ public record CaptureRequest {
         /// </summary>
         [JsonConverter(typeof(RawJsonConverter))]
         public string? Metadata { get; set; }
-        
+
+        /// <summary>
+        ///	Oauth only - Optional – Set this to true to make this capture for a test payment
+        /// </summary>
+        public bool? Testmode { get; set; }
+
         public void SetMetadata(object metadataObj, JsonSerializerSettings? jsonSerializerSettings = null) {
             Metadata = JsonConvert.SerializeObject(metadataObj, jsonSerializerSettings);
         }
-        
+
         public override string ToString() {
             return $"Amount: {Amount} Description: {Description}";
         }
     }
-}
\ No newline at end of file
+}