Dear Community

Hope you can assit me with resoloving the error messge for the test class

I want to confim that inserted custom Object for test account (where Account Shipping Code is GB) has a correct Email Address updated under custom field: ISAM team to be notified . I am getting error 
Error MessageSystem.AssertException: Assertion Failed: Expected: ISAMS-UK@idexx.com, Actual: isams-uk@idexx.com
Stack TraceClass.Test_PB_CMFUPdateISAMEmail.testCountryGB: line 35, column 1

Would you know how this should fixed? 

@isTest
public class Test_PB_CMFUPdateISAMEmail {
   //tests the following: 
   //Process Builder : "EU - EMEA CMF Updates"
   //test is only for 1 Action update field on CMF Form  ISAM team to be notified based on account country 
   
   
    @TestSetup static void setup() {
        //Create an Account
        Account testAccount = new Account(
          RecordTypeId = Schema.SObjectType.Account.getRecordTypeInfosByName().get('Customer').getRecordTypeId(),
            Name = 'Test Account',
            SAP_Customer_Number__c ='0012345678',
            ShippingCountryCode =  'GB'
      );
        insert testAccount;
        
        //Create Cusotmer Master fiele Update record with 1 of the countires GB
        Customer_Master_File_Update__c testCMF = new Customer_Master_File_Update__c(
            Name = 'test',
            RecordTypeId = Schema.SObjectType.Customer_Master_File_Update__c.getRecordTypeInfosByName().get('Change of Fiscal Data').getRecordTypeId(),
            Account_To_Update__c = testAccount.Id
           
        );
        insert testCMF;
       
               
  }

    //Tests condition Customer Master  file Account Shipping Country = 'GB'
    @isTest
    static void testCountryGB(){
        Test.startTest();
          Customer_Master_File_Update__c testCMF = [SELECT Id, ISAM_team_to_be_notified__c FROM Customer_Master_File_Update__c];   
          system.assertEquals('ISAMS-UK@idexx.com', testCMF.ISAM_team_to_be_notified__c );          
        Test.stopTest();  
    }
}