Você pode testar diferentes tipos de retornos alterando o valor dos centavos, conforme a tabela abaixo:

CentavosStatusMensagem
00authorizedApproved or completed sucessfully
01authorization_declinedRefer to card issuer
02authorization_declinedRefer to card issuer, special condition
03authorization_declinedInvalid merchant
04-05authorization_declinedDo not honor
06authorization_declinedError
07authorization_declinedSpecial conditions
08authorizedHonor with identification
09authorization_declinedRequest in progress
10authorization_declinedApproved, partial
11authorizedApproved, VIP
12authorization_declinedInvalid transaction
13authorization_declinedInvalid amount
14authorization_declinedInvalid card number
15authorization_declinedNo such issue
16authorizedApproved, update track 3
17-18authorization_declinedError
19authorization_declinedRe-enter transaction
20-22authorization_declinedError
23authorization_declinedUnacceptable transaction fee
24authorization_declinedFile update not supported
25authorization_declinedUnable to locate record
26authorization_declinedDuplicate record
27authorization_declinedFile update edit error
28authorization_declinedFile update file locked
29authorization_declinedFile update failed.
30authorization_declinedFormat error
31authorization_declinedNo such issue
32authorization_declinedError
33authorization_declinedExpired card, pick-up
34authorization_declinedSuspected fraud, pick-up
35authorization_declinedContact acquirer, pick-up
36authorization_declinedRestricted card, pick-up
37authorization_declinedCall acquirer security, pick-up
38authorization_declinedPIN tries exceeded, pick-up
39authorization_declinedNo credit account
40authorization_declinedFunction not supported
41authorization_declinedLost card
42authorization_declinedNo credit account
43authorization_declinedStolen card
44authorization_declinedNo credit account
45-50authorization_declinedError
51authorization_declinedNot sufficient funds
52-53authorization_declinedNo credit account
54authorization_declinedExpired card
55authorization_declinedIncorrect PIN
56authorization_declinedNo card record
57authorization_declinedTransaction not permitted to cardholder
58authorization_declinedTransaction not permitted on terminal
59authorization_declinedSuspected fraud
60authorization_declinedContact acquirer
61authorization_declinedExceeds withdrawal limit
62authorization_declinedRestricted card
63authorization_declinedSecurity violation
64authorization_declinedInvalid amount
65authorization_declinedExceeds withdrawal frequency
66authorization_declinedCall acquirer security
67authorization_declinedPick-up card
68-74authorization_declinedError
75authorization_declinedPIN tries exceeded
76-77authorization_declinedCode without an appropriate response message
78authorization_declinedNo credit account
79-80authorization_declinedCode without an appropriate response message
81authorization_declinedInvalid transaction
82-83authorization_declinedError
84authorization_declinedCode without an appropriate response message
85authorizedApproved or completed successfully
86-88authorization_declinedCode without an appropriate response message
89authorization_declinedIncorrect PIN
90authorization_declinedCut-off in progress
91authorization_declinedIssuer or switch inoperative
92authorization_declinedNo such issue
93authorization_declinedViolation of law
94authorization_declinedDuplicate transaction
95authorization_declinedReconcile error
96authorization_declinedSystem malfunction
97-99authorization_declinedError