diff --git a/tests/unit-tests/ca-memory.t.cpp b/tests/unit-tests/ca-memory.t.cpp
index 01812af..452937e 100644
--- a/tests/unit-tests/ca-memory.t.cpp
+++ b/tests/unit-tests/ca-memory.t.cpp
@@ -82,7 +82,7 @@
   auto cert1 = key1.getDefaultCertificate();
 
   // add operation
-  CertificateRequest request1(Name("/ndn/site1"), "123", REQUEST_TYPE_NEW, Status::BEFORE_CHALLENGE, cert1);
+  CertificateRequest request1(Name("/ndn/site1"), "123", RequestType::NEW, Status::BEFORE_CHALLENGE, cert1);
   BOOST_CHECK_NO_THROW(storage.addRequest(request1));
 
   // get operation
@@ -95,7 +95,7 @@
   json.put("code", "1234");
 
   // update operation
-  CertificateRequest request2(Name("/ndn/site1"), "123", REQUEST_TYPE_NEW, Status::CHALLENGE, CHALLENGE_STATUS_SUCCESS,
+  CertificateRequest request2(Name("/ndn/site1"), "123", RequestType::NEW, Status::CHALLENGE, CHALLENGE_STATUS_SUCCESS,
                               "Email", time::toIsoString(time::system_clock::now()), 3600, 3, json, cert1);
   storage.updateRequest(request2);
   result = storage.getRequest("123");
@@ -106,7 +106,7 @@
   auto identity2 = addIdentity(Name("/ndn/site2"));
   auto key2 = identity2.getDefaultKey();
   auto cert2 = key2.getDefaultCertificate();
-  CertificateRequest request3(Name("/ndn/site2"), "456", REQUEST_TYPE_NEW, Status::BEFORE_CHALLENGE, cert2);
+  CertificateRequest request3(Name("/ndn/site2"), "456", RequestType::NEW, Status::BEFORE_CHALLENGE, cert2);
   storage.addRequest(request3);
 
   // list operation
diff --git a/tests/unit-tests/ca-module.t.cpp b/tests/unit-tests/ca-module.t.cpp
index 2ac15da..4f2c092 100644
--- a/tests/unit-tests/ca-module.t.cpp
+++ b/tests/unit-tests/ca-module.t.cpp
@@ -441,7 +441,7 @@
   signatureInfo.setValidityPeriod(security::ValidityPeriod(time::system_clock::now(),
                                                            time::system_clock::now() + time::hours(10)));
   m_keyChain.sign(clientCert, signingByKey(clientKey.getName()).setSignatureInfo(signatureInfo));
-  CertificateRequest certRequest(Name("/ndn"), "122", REQUEST_TYPE_NEW, Status::SUCCESS, clientCert);
+  CertificateRequest certRequest(Name("/ndn"), "122", RequestType::NEW, Status::SUCCESS, clientCert);
   auto issuedCert = ca.issueCertificate(certRequest);
 
   ClientModule client(m_keyChain);
diff --git a/tests/unit-tests/ca-sqlite.t.cpp b/tests/unit-tests/ca-sqlite.t.cpp
index 467ddb3..123db6a 100644
--- a/tests/unit-tests/ca-sqlite.t.cpp
+++ b/tests/unit-tests/ca-sqlite.t.cpp
@@ -81,7 +81,7 @@
   auto cert1 = key1.getDefaultCertificate();
 
   // add operation
-  CertificateRequest request1(Name("/ndn/site1"), "123", REQUEST_TYPE_NEW, Status::BEFORE_CHALLENGE, cert1);
+  CertificateRequest request1(Name("/ndn/site1"), "123", RequestType::NEW, Status::BEFORE_CHALLENGE, cert1);
   BOOST_CHECK_NO_THROW(storage.addRequest(request1));
 
   // get operation
@@ -93,7 +93,7 @@
   // update operation
   JsonSection json;
   json.put("test", "4567");
-  CertificateRequest request2(Name("/ndn/site1"), "123", REQUEST_TYPE_NEW, Status::CHALLENGE, CHALLENGE_STATUS_SUCCESS,
+  CertificateRequest request2(Name("/ndn/site1"), "123", RequestType::NEW, Status::CHALLENGE, CHALLENGE_STATUS_SUCCESS,
                              "Email", time::toIsoString(time::system_clock::now()), 3600, 3, json, cert1);
   storage.updateRequest(request2);
   result = storage.getRequest("123");
@@ -104,7 +104,7 @@
   auto identity2 = addIdentity(Name("/ndn/site2"));
   auto key2 = identity2.getDefaultKey();
   auto cert2 = key2.getDefaultCertificate();
-  CertificateRequest request3(Name("/ndn/site2"), "456", REQUEST_TYPE_NEW, Status::BEFORE_CHALLENGE, cert2);
+  CertificateRequest request3(Name("/ndn/site2"), "456", RequestType::NEW, Status::BEFORE_CHALLENGE, cert2);
   storage.addRequest(request3);
 
   // list operation
diff --git a/tests/unit-tests/challenge-credential.t.cpp b/tests/unit-tests/challenge-credential.t.cpp
index 358175e..a4acddc 100644
--- a/tests/unit-tests/challenge-credential.t.cpp
+++ b/tests/unit-tests/challenge-credential.t.cpp
@@ -55,7 +55,7 @@
   auto identityA = addIdentity(Name("/example"));
   auto keyA = identityA.getDefaultKey();
   auto certA = key.getDefaultCertificate();
-  CertificateRequest request(Name("/example"), "123", REQUEST_TYPE_NEW, Status::BEFORE_CHALLENGE, certA);
+  CertificateRequest request(Name("/example"), "123", RequestType::NEW, Status::BEFORE_CHALLENGE, certA);
 
   // create requester's existing cert
   auto identityB = addIdentity(Name("/trust/cert"));
diff --git a/tests/unit-tests/challenge-email.t.cpp b/tests/unit-tests/challenge-email.t.cpp
index d397e58..9be44be 100644
--- a/tests/unit-tests/challenge-email.t.cpp
+++ b/tests/unit-tests/challenge-email.t.cpp
@@ -45,7 +45,7 @@
   auto identity = addIdentity(Name("/ndn/site1"));
   auto key = identity.getDefaultKey();
   auto cert = key.getDefaultCertificate();
-  CertificateRequest request(Name("/ndn/site1"), "123", REQUEST_TYPE_NEW, Status::BEFORE_CHALLENGE, cert);
+  CertificateRequest request(Name("/ndn/site1"), "123", RequestType::NEW, Status::BEFORE_CHALLENGE, cert);
 
   Block paramTLV = makeEmptyBlock(tlv_encrypted_payload);
   paramTLV.push_back(makeStringBlock(tlv_parameter_key, ChallengeEmail::PARAMETER_KEY_EMAIL));
@@ -95,7 +95,7 @@
   auto identity = addIdentity(Name("/ndn/site1"));
   auto key = identity.getDefaultKey();
   auto cert = key.getDefaultCertificate();
-  CertificateRequest request(Name("/ndn/site1"), "123", REQUEST_TYPE_NEW, Status::BEFORE_CHALLENGE, cert);
+  CertificateRequest request(Name("/ndn/site1"), "123", RequestType::NEW, Status::BEFORE_CHALLENGE, cert);
 
   Block paramTLV = makeEmptyBlock(tlv_encrypted_payload);
   paramTLV.push_back(makeStringBlock(tlv_parameter_key, ChallengeEmail::PARAMETER_KEY_EMAIL));
@@ -114,7 +114,7 @@
   auto cert = key.getDefaultCertificate();
   JsonSection json;
   json.put(ChallengeEmail::PARAMETER_KEY_CODE, "4567");
-  CertificateRequest request(Name("/ndn/site1"), "123", REQUEST_TYPE_NEW, Status::CHALLENGE, ChallengeEmail::NEED_CODE,
+  CertificateRequest request(Name("/ndn/site1"), "123", RequestType::NEW, Status::CHALLENGE, ChallengeEmail::NEED_CODE,
                              "Email", time::toIsoString(time::system_clock::now()), 3600, 3, json, cert);
 
   Block paramTLV = makeEmptyBlock(tlv_encrypted_payload);
@@ -135,7 +135,7 @@
   auto cert = key.getDefaultCertificate();
   JsonSection json;
   json.put(ChallengeEmail::PARAMETER_KEY_CODE, "4567");
-  CertificateRequest request(Name("/ndn/site1"), "123", REQUEST_TYPE_NEW, Status::CHALLENGE, ChallengeEmail::NEED_CODE,
+  CertificateRequest request(Name("/ndn/site1"), "123", RequestType::NEW, Status::CHALLENGE, ChallengeEmail::NEED_CODE,
                              "email", time::toIsoString(time::system_clock::now()), 3600, 3, json, cert);
 
   Block paramTLV = makeEmptyBlock(tlv_encrypted_payload);
diff --git a/tests/unit-tests/challenge-pin.t.cpp b/tests/unit-tests/challenge-pin.t.cpp
index a75444a..810b285 100644
--- a/tests/unit-tests/challenge-pin.t.cpp
+++ b/tests/unit-tests/challenge-pin.t.cpp
@@ -38,7 +38,7 @@
   auto identity = addIdentity(Name("/ndn/site1"));
   auto key = identity.getDefaultKey();
   auto cert = key.getDefaultCertificate();
-  CertificateRequest request(Name("/ndn/site1"), "123", REQUEST_TYPE_NEW, Status::BEFORE_CHALLENGE, cert);
+  CertificateRequest request(Name("/ndn/site1"), "123", RequestType::NEW, Status::BEFORE_CHALLENGE, cert);
 
   ChallengePin challenge;
   challenge.handleChallengeRequest(makeEmptyBlock(tlv_encrypted_payload), request);
@@ -55,7 +55,7 @@
   auto cert = key.getDefaultCertificate();
   JsonSection secret;
   secret.add(ChallengePin::PARAMETER_KEY_CODE, "12345");
-  CertificateRequest request(Name("/ndn/site1"), "123", REQUEST_TYPE_NEW, Status::CHALLENGE, ChallengePin::NEED_CODE, "pin",
+  CertificateRequest request(Name("/ndn/site1"), "123", RequestType::NEW, Status::CHALLENGE, ChallengePin::NEED_CODE, "pin",
                              time::toIsoString(time::system_clock::now()), 3600, 3, secret, cert);
 
   Block paramTLV = makeEmptyBlock(tlv_encrypted_payload);
@@ -76,7 +76,7 @@
   auto cert = key.getDefaultCertificate();
   JsonSection secret;
   secret.add(ChallengePin::PARAMETER_KEY_CODE, "12345");
-  CertificateRequest request(Name("/ndn/site1"), "123", REQUEST_TYPE_NEW, Status::CHALLENGE, ChallengePin::NEED_CODE, "pin",
+  CertificateRequest request(Name("/ndn/site1"), "123", RequestType::NEW, Status::CHALLENGE, ChallengePin::NEED_CODE, "pin",
                              time::toIsoString(time::system_clock::now()), 3600, 3, secret, cert);
 
   Block paramTLV = makeEmptyBlock(tlv_encrypted_payload);