diff --git a/test/integration/test_return_codes.rb b/test/integration/test_return_codes.rb
index 58189f92..30057a2a 100644
--- a/test/integration/test_return_codes.rb
+++ b/test/integration/test_return_codes.rb
@@ -5,7 +5,7 @@
 
 class TestReturnCodeIntegration < LDAPIntegrationTestCase
   def test_open_error
-    @ldap.authenticate "fake", "creds"
+    @ldap.authenticate "cn=fake", "creds"
     @ldap.open do
       result = @ldap.get_operation_result
       assert_equal Net::LDAP::ResultCodeInvalidCredentials, result.code