diff --git a/Xero.NetStandard.OAuth2.Test/Api/AccountingApiTests.cs b/Xero.NetStandard.OAuth2.Test/Api/AccountingApiTests.cs
index a7d56812..bd5346f8 100755
--- a/Xero.NetStandard.OAuth2.Test/Api/AccountingApiTests.cs
+++ b/Xero.NetStandard.OAuth2.Test/Api/AccountingApiTests.cs
@@ -148,7 +148,7 @@ public async Task CreateBankTransactionsTest()
       bankTransactions._BankTransactions = new List<BankTransaction> { new BankTransaction() };
       string idempotencyKey = AutoFaker.Generate<string>();
       bool? summarizeErrors = AutoFaker.Generate<bool?>();
-      var response = await instance.CreateBankTransactionsAsync(accessToken, xeroTenantId, bankTransactions, idempotencyKey, summarizeErrors).ConfigureAwait(false);
+      var response = await instance.CreateBankTransactionsAsync(accessToken, xeroTenantId, bankTransactions, summarizeErrors, null, idempotencyKey ).ConfigureAwait(false);
       Assert.IsType<BankTransactions>(response);
     }
 
@@ -304,7 +304,7 @@ public async Task CreateContactsTest()
       Contacts contacts = new Contacts();
       string idempotencyKey = AutoFaker.Generate<string>();
       bool? summarizeErrors = AutoFaker.Generate<bool?>();
-      var response = await instance.CreateContactsAsync(accessToken, xeroTenantId, contacts, idempotencyKey, summarizeErrors).ConfigureAwait(false);
+      var response = await instance.CreateContactsAsync(accessToken, xeroTenantId, contacts, summarizeErrors, idempotencyKey).ConfigureAwait(false);
       Assert.IsType<Contacts>(response);
     }
 
@@ -362,7 +362,7 @@ public async Task CreateCreditNotesTest()
       CreditNotes creditNotes = new CreditNotes();
       string idempotencyKey = AutoFaker.Generate<string>();
       bool? summarizeErrors = AutoFaker.Generate<bool?>();
-      var response = await instance.CreateCreditNotesAsync(accessToken, xeroTenantId, creditNotes, idempotencyKey, summarizeErrors).ConfigureAwait(false);
+      var response = await instance.CreateCreditNotesAsync(accessToken, xeroTenantId, creditNotes, summarizeErrors, null, idempotencyKey).ConfigureAwait(false);
       Assert.IsType<CreditNotes>(response);
     }
 
@@ -465,7 +465,7 @@ public async Task CreateInvoicesTest()
       invoices._Invoices = invList;
       string idempotencyKey = AutoFaker.Generate<string>();
       bool? summarizeErrors = AutoFaker.Generate<bool?>();
-      var response = await instance.CreateInvoicesAsync(accessToken, xeroTenantId, invoices, idempotencyKey, summarizeErrors).ConfigureAwait(false);
+      var response = await instance.CreateInvoicesAsync(accessToken, xeroTenantId, invoices, summarizeErrors, null, idempotencyKey).ConfigureAwait(false);
       Assert.IsType<Invoices>(response);
     }
 
@@ -494,7 +494,7 @@ public async Task CreateItemsTest()
       Items items = new Items();
       string idempotencyKey = AutoFaker.Generate<string>();
       bool? summarizeErrors = AutoFaker.Generate<bool?>();
-      var response = await instance.CreateItemsAsync(accessToken, xeroTenantId, items, idempotencyKey, summarizeErrors).ConfigureAwait(false);
+      var response = await instance.CreateItemsAsync(accessToken, xeroTenantId, items, summarizeErrors, null, idempotencyKey).ConfigureAwait(false);
       Assert.IsType<Items>(response);
     }
 
@@ -689,7 +689,7 @@ public async Task CreatePurchaseOrdersTest()
       PurchaseOrders purchaseOrders = new PurchaseOrders();
       string idempotencyKey = AutoFaker.Generate<string>();
       bool? summarizeErrors = AutoFaker.Generate<bool?>();
-      var response = await instance.CreatePurchaseOrdersAsync(accessToken, xeroTenantId, purchaseOrders, idempotencyKey, summarizeErrors).ConfigureAwait(false);
+      var response = await instance.CreatePurchaseOrdersAsync(accessToken, xeroTenantId, purchaseOrders, summarizeErrors, idempotencyKey).ConfigureAwait(false);
       Assert.IsType<PurchaseOrders>(response);
     }
 
@@ -2742,7 +2742,7 @@ public async Task UpdateOrCreateBankTransactionsTest()
       BankTransactions bankTransactions = new BankTransactions();
       string idempotencyKey = AutoFaker.Generate<string>();
       bool? summarizeErrors = AutoFaker.Generate<bool?>();
-      var response = await instance.UpdateOrCreateBankTransactionsAsync(accessToken, xeroTenantId, bankTransactions, idempotencyKey, summarizeErrors).ConfigureAwait(false);
+      var response = await instance.UpdateOrCreateBankTransactionsAsync(accessToken, xeroTenantId, bankTransactions, summarizeErrors, null, idempotencyKey).ConfigureAwait(false);
       Assert.IsType<BankTransactions>(response);
     }
 
@@ -2757,7 +2757,7 @@ public async Task UpdateOrCreateContactsTest()
       string idempotencyKey = AutoFaker.Generate<string>();
       Contacts contacts = new Contacts();
       bool? summarizeErrors = AutoFaker.Generate<bool?>();
-      var response = await instance.UpdateOrCreateContactsAsync(accessToken, xeroTenantId, contacts, idempotencyKey, summarizeErrors).ConfigureAwait(false);
+      var response = await instance.UpdateOrCreateContactsAsync(accessToken, xeroTenantId, contacts, summarizeErrors, idempotencyKey).ConfigureAwait(false);
       Assert.IsType<Contacts>(response);
     }
 
@@ -2772,7 +2772,7 @@ public async Task UpdateOrCreateCreditNotesTest()
       CreditNotes creditNotes = new CreditNotes();
       string idempotencyKey = AutoFaker.Generate<string>();
       bool? summarizeErrors = AutoFaker.Generate<bool?>();
-      var response = await instance.UpdateOrCreateCreditNotesAsync(accessToken, xeroTenantId, creditNotes, idempotencyKey, summarizeErrors).ConfigureAwait(false);
+      var response = await instance.UpdateOrCreateCreditNotesAsync(accessToken, xeroTenantId, creditNotes, summarizeErrors, null, idempotencyKey).ConfigureAwait(false);
       Assert.IsType<CreditNotes>(response);
     }
 
@@ -2787,7 +2787,7 @@ public async Task UpdateOrCreateInvoicesTest()
       Invoices invoices = new Invoices();
       string idempotencyKey = AutoFaker.Generate<string>();
       bool? summarizeErrors = AutoFaker.Generate<bool?>();
-      var response = await instance.UpdateOrCreateInvoicesAsync(accessToken, xeroTenantId, invoices, idempotencyKey, summarizeErrors).ConfigureAwait(false);
+      var response = await instance.UpdateOrCreateInvoicesAsync(accessToken, xeroTenantId, invoices, summarizeErrors, null, idempotencyKey).ConfigureAwait(false);
       Assert.IsType<Invoices>(response);
     }
 
@@ -2802,7 +2802,7 @@ public async Task UpdateOrCreateItemsTest()
       Items items = new Items();
       string idempotencyKey = AutoFaker.Generate<string>();
       bool? summarizeErrors = AutoFaker.Generate<bool?>();
-      var response = await instance.UpdateOrCreateItemsAsync(accessToken, xeroTenantId, items, idempotencyKey, summarizeErrors).ConfigureAwait(false);
+      var response = await instance.UpdateOrCreateItemsAsync(accessToken, xeroTenantId, items, summarizeErrors, null, idempotencyKey).ConfigureAwait(false);
       Assert.IsType<Items>(response);
     }
 
@@ -2817,7 +2817,7 @@ public async Task UpdateOrCreatePurchaseOrdersTest()
       PurchaseOrders purchaseOrders = new PurchaseOrders();
       string idempotencyKey = AutoFaker.Generate<string>();
       bool? summarizeErrors = AutoFaker.Generate<bool?>();
-      var response = await instance.UpdateOrCreatePurchaseOrdersAsync(accessToken, xeroTenantId, purchaseOrders, idempotencyKey, summarizeErrors).ConfigureAwait(false);
+      var response = await instance.UpdateOrCreatePurchaseOrdersAsync(accessToken, xeroTenantId, purchaseOrders, summarizeErrors, idempotencyKey).ConfigureAwait(false);
       Assert.IsType<PurchaseOrders>(response);
     }
 
diff --git a/Xero.NetStandard.OAuth2.Test/Api/BankFeedsApiTests.cs b/Xero.NetStandard.OAuth2.Test/Api/BankFeedsApiTests.cs
index 98631b44..a6778e5e 100644
--- a/Xero.NetStandard.OAuth2.Test/Api/BankFeedsApiTests.cs
+++ b/Xero.NetStandard.OAuth2.Test/Api/BankFeedsApiTests.cs
@@ -92,7 +92,7 @@ public async Task CreateStatementsTest()
         {
             Statements statements = new Statements();
             string idempotencyKey = AutoFaker.Generate<string>();
-            var response = await instance.CreateStatementsAsync(accessToken, xeroTenantId, idempotencyKey, statements);
+            var response = await instance.CreateStatementsAsync(accessToken, xeroTenantId, statements, idempotencyKey);
             Assert.IsType<Statements>(response);
         }
         
diff --git a/Xero.NetStandard.OAuth2.Test/Api/PayrollAuApiTests.cs b/Xero.NetStandard.OAuth2.Test/Api/PayrollAuApiTests.cs
index 6813841a..b545339d 100644
--- a/Xero.NetStandard.OAuth2.Test/Api/PayrollAuApiTests.cs
+++ b/Xero.NetStandard.OAuth2.Test/Api/PayrollAuApiTests.cs
@@ -357,7 +357,7 @@ public async Task UpdateEmployeeTest()
             Guid employeeId = AutoFaker.Generate<Guid>();
             List<Employee> employee = new List<Employee> { new Employee() };
             string idempotencyKey = AutoFaker.Generate<string>();
-            var response = await instance.UpdateEmployeeAsync(accessToken, xeroTenantId, employeeId, idempotencyKey, employee);
+            var response = await instance.UpdateEmployeeAsync(accessToken, xeroTenantId, employeeId, employee, idempotencyKey);
             Assert.IsType<Employees>(response);
         }
         
@@ -382,7 +382,7 @@ public async Task UpdatePayRunTest()
             Guid payRunID = AutoFaker.Generate<Guid>();
             string idempotencyKey = AutoFaker.Generate<string>();
             List<PayRun> payRun = new List<PayRun> { new PayRun() };
-            var response = await instance.UpdatePayRunAsync(accessToken, xeroTenantId, payRunID, idempotencyKey, payRun);
+            var response = await instance.UpdatePayRunAsync(accessToken, xeroTenantId, payRunID, payRun, idempotencyKey);
             Assert.IsType<PayRuns>(response);
         }
         
@@ -395,7 +395,7 @@ public async Task UpdatePayslipTest()
             Guid payslipID = AutoFaker.Generate<Guid>();
             string idempotencyKey = AutoFaker.Generate<string>();
             List<PayslipLines> payslipLines = new List<PayslipLines> { new PayslipLines() };
-            var response = await instance.UpdatePayslipAsync(accessToken, xeroTenantId, payslipID, idempotencyKey, payslipLines);
+            var response = await instance.UpdatePayslipAsync(accessToken, xeroTenantId, payslipID, payslipLines, idempotencyKey);
             Assert.IsType<Payslips>(response);
         }
         
@@ -408,7 +408,7 @@ public async Task UpdateSuperfundTest()
             Guid superFundID = AutoFaker.Generate<Guid>();
             string idempotencyKey = AutoFaker.Generate<string>();
             List<SuperFund> superFund = new List<SuperFund> { new SuperFund() };
-            var response = await instance.UpdateSuperfundAsync(accessToken, xeroTenantId, superFundID, idempotencyKey, superFund);
+            var response = await instance.UpdateSuperfundAsync(accessToken, xeroTenantId, superFundID, superFund, idempotencyKey);
             Assert.IsType<SuperFunds>(response);
         }
         
@@ -421,7 +421,7 @@ public async Task UpdateTimesheetTest()
             Guid timesheetID = AutoFaker.Generate<Guid>();
             string idempotencyKey = AutoFaker.Generate<string>();
             List<Timesheet> timesheet = new List<Timesheet> { new Timesheet() };
-            var response = await instance.UpdateTimesheetAsync(accessToken, xeroTenantId, timesheetID, idempotencyKey, timesheet);
+            var response = await instance.UpdateTimesheetAsync(accessToken, xeroTenantId, timesheetID, timesheet, idempotencyKey);
             Assert.IsType<Timesheets>(response);
         }