Support form validation error for non signed in existing employee

spec/acceptance/suppliers/signup.feature

@@ -38,6 +38,15 @@ Feature: A supplier can sign up
     And fill in the supplier signup form with an existing supplier name
     And click on the supplier signup submit button
     Then the new supplier signup for should have an error on 'supplier_name'
+
+  @javascript
+  Scenario: Existing non signed in employee creates existing supplier name
+    Given there is a confirmed and open supplier
+    When I visit the supplier signup path
+    And fill in the supplier signup form with existing employee credentials
+    And fill in the supplier signup form with an existing supplier name
+    And click on the supplier signup submit button
+    Then the new supplier signup for should have an error on 'supplier_name'
 #Scenarios
 #- non existing non signed in employee
 #- existing non signed in employee