diff --git a/samples/client/petstore/cpp-qt5/PetStore/PetApiTests.cpp b/samples/client/petstore/cpp-qt5/PetStore/PetApiTests.cpp
index 595aa66b3cd..115ceadbd06 100644
--- a/samples/client/petstore/cpp-qt5/PetStore/PetApiTests.cpp
+++ b/samples/client/petstore/cpp-qt5/PetStore/PetApiTests.cpp
@@ -24,6 +24,10 @@ void PetApiTests::findPetsByStatusTest() {
         }
         loop.quit();
     });
+    connect(&api, &PFXPetApi::findPetsByStatusSignalE, [&](QList<PFXPet>, QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
 
     api.findPetsByStatus({"available", "sold"});
     QTimer::singleShot(5000, &loop, &QEventLoop::quit);
@@ -41,6 +45,11 @@ void PetApiTests::createAndGetPetTest() {
         petCreated = true;
         loop.quit();
     });
+    connect(&api, &PFXPetApi::addPetSignalE, [&](QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
+
 
     PFXPet pet = createRandomPet();
     qint64 id = pet.getId();
@@ -55,10 +64,13 @@ void PetApiTests::createAndGetPetTest() {
     connect(&api, &PFXPetApi::getPetByIdSignal, [&](PFXPet pet) {
         QVERIFY(pet.getId() > 0);
         QVERIFY(pet.getStatus().compare("freaky") == 0);
-        loop.quit();
         petFetched = true;
+        loop.quit();
+    });
+    connect(&api, &PFXPetApi::getPetByIdSignalE, [&](PFXPet, QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
     });
-
     api.getPetById(id);
     QTimer::singleShot(14000, &loop, &QEventLoop::quit);
     loop.exec();
@@ -78,7 +90,10 @@ void PetApiTests::updatePetTest() {
         petAdded = true;
         loop.quit();
     });
-
+    connect(&api, &PFXPetApi::addPetSignalE, [&](QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
     // create pet
     api.addPet(pet);
     QTimer::singleShot(5000, &loop, &QEventLoop::quit);
@@ -93,7 +108,10 @@ void PetApiTests::updatePetTest() {
         petToCheck = pet;
         loop.quit();
     });
-
+    connect(&api, &PFXPetApi::getPetByIdSignalE, this, [&](PFXPet, QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
     // create pet
     api.getPetById(id);
     QTimer::singleShot(5000, &loop, &QEventLoop::quit);
@@ -106,6 +124,10 @@ void PetApiTests::updatePetTest() {
         petUpdated = true;
         loop.quit();
     });
+    connect(&api, &PFXPetApi::updatePetSignalE, [&](QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
 
     // update pet
     petToCheck.setStatus(QString("scary"));
@@ -122,6 +144,10 @@ void PetApiTests::updatePetTest() {
         QVERIFY(pet.getStatus().compare(petToCheck.getStatus()) == 0);
         loop.quit();
     });
+    connect(&api, &PFXPetApi::getPetByIdSignalE, [&](PFXPet, QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
     api.getPetById(id);
     QTimer::singleShot(5000, &loop, &QEventLoop::quit);
     loop.exec();
@@ -142,6 +168,10 @@ void PetApiTests::updatePetWithFormTest() {
         petAdded = true;
         loop.quit();
     });
+    connect(&api, &PFXPetApi::addPetSignalE, [&](QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
 
     api.addPet(pet);
     QTimer::singleShot(5000, &loop, &QEventLoop::quit);
@@ -155,6 +185,10 @@ void PetApiTests::updatePetWithFormTest() {
         petToCheck = pet;
         loop.quit();
     });
+    connect(&api, &PFXPetApi::getPetByIdSignalE, [&](PFXPet, QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
 
     api.getPetById(id);
     QTimer::singleShot(5000, &loop, &QEventLoop::quit);
@@ -167,6 +201,10 @@ void PetApiTests::updatePetWithFormTest() {
         petUpdated = true;
         loop.quit();
     });
+    connect(&api, &PFXPetApi::updatePetWithFormSignalE, [&](QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
 
     QString name("gorilla");
     api.updatePetWithForm(id, name, nullptr);
@@ -181,6 +219,10 @@ void PetApiTests::updatePetWithFormTest() {
         QVERIFY(pet.getName().compare(QString("gorilla")) == 0);
         loop.quit();
     });
+    connect(&api, &PFXPetApi::getPetByIdSignalE, [&](PFXPet, QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
 
     api.getPetById(id);
     QTimer::singleShot(5000, &loop, &QEventLoop::quit);
diff --git a/samples/client/petstore/cpp-qt5/PetStore/StoreApiTests.cpp b/samples/client/petstore/cpp-qt5/PetStore/StoreApiTests.cpp
index fd7d04b0ba4..0c0c926d1eb 100644
--- a/samples/client/petstore/cpp-qt5/PetStore/StoreApiTests.cpp
+++ b/samples/client/petstore/cpp-qt5/PetStore/StoreApiTests.cpp
@@ -16,8 +16,8 @@ void StoreApiTests::placeOrderTest() {
         qDebug() << order.getShipDate();
         loop.quit();
     });
-    connect(&api, &PFXStoreApi::placeOrderSignalE, [&]() {
-        QFAIL("shouldn't trigger error");
+    connect(&api, &PFXStoreApi::placeOrderSignalE, [&](PFXOrder, QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
         loop.quit();
     });
 
@@ -46,6 +46,10 @@ void StoreApiTests::getOrderByIdTest() {
         qDebug() << order.getShipDate();
         loop.quit();
     });
+    connect(&api, &PFXStoreApi::getOrderByIdSignalE, [&](PFXOrder, QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
 
     api.getOrderById(500);
     QTimer::singleShot(14000, &loop, &QEventLoop::quit);
@@ -65,6 +69,10 @@ void StoreApiTests::getInventoryTest() {
         }
         loop.quit();
     });
+    connect(&api, &PFXStoreApi::getInventorySignalE, [&](QMap<QString, qint32>, QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
 
     api.getInventory();
     QTimer::singleShot(14000, &loop, &QEventLoop::quit);
diff --git a/samples/client/petstore/cpp-qt5/PetStore/UserApiTests.cpp b/samples/client/petstore/cpp-qt5/PetStore/UserApiTests.cpp
index 87e7c3f591b..fbbfcce167d 100644
--- a/samples/client/petstore/cpp-qt5/PetStore/UserApiTests.cpp
+++ b/samples/client/petstore/cpp-qt5/PetStore/UserApiTests.cpp
@@ -26,6 +26,10 @@ void UserApiTests::createUserTest() {
         userCreated = true;
         loop.quit();
     });
+    connect(&api, &PFXUserApi::createUserSignalE, [&](QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
 
     api.createUser(createRandomUser());
     QTimer::singleShot(14000, &loop, &QEventLoop::quit);
@@ -42,6 +46,10 @@ void UserApiTests::createUsersWithArrayInputTest() {
         usersCreated = true;
         loop.quit();
     });
+    connect(&api, &PFXUserApi::createUsersWithArrayInputSignalE, [&](QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
 
     QList<PFXUser> users;
     users.append(createRandomUser());
@@ -62,6 +70,10 @@ void UserApiTests::createUsersWithListInputTest() {
         usersCreated = true;
         loop.quit();
     });
+    connect(&api, &PFXUserApi::createUsersWithListInputSignalE, [&](QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
 
     QList<PFXUser> users;
     auto johndoe = createRandomUser();
@@ -86,6 +98,11 @@ void UserApiTests::deleteUserTest() {
         userDeleted = true;
         loop.quit();
     });
+    connect(&api, &PFXUserApi::deleteUserSignalE, [&](QNetworkReply::NetworkError, QString error_str) {
+        userDeleted = true;
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
 
     api.deleteUser("rambo");
     QTimer::singleShot(14000, &loop, &QEventLoop::quit);
@@ -104,6 +121,11 @@ void UserApiTests::getUserByNameTest() {
         QVERIFY(summary.getUsername() == "johndoe");
         loop.quit();
     });
+    connect(&api, &PFXUserApi::getUserByNameSignalE, [&](PFXUser, QNetworkReply::NetworkError, QString error_str) {
+        userFetched = true;
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
 
     api.getUserByName("johndoe");
     QTimer::singleShot(14000, &loop, &QEventLoop::quit);
@@ -121,6 +143,11 @@ void UserApiTests::loginUserTest() {
         qDebug() << summary;
         loop.quit();
     });
+    connect(&api, &PFXUserApi::loginUserSignalE, [&](QString, QNetworkReply::NetworkError, QString error_str) {
+        userLogged = true;
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
 
     api.loginUser("johndoe", "123456789");
     QTimer::singleShot(14000, &loop, &QEventLoop::quit);
@@ -137,6 +164,10 @@ void UserApiTests::logoutUserTest() {
         userLoggedOut = true;
         loop.quit();
     });
+    connect(&api, &PFXUserApi::logoutUserSignalE, [&](QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
 
     api.logoutUser();
     QTimer::singleShot(14000, &loop, &QEventLoop::quit);
@@ -153,6 +184,10 @@ void UserApiTests::updateUserTest() {
         userUpdated = true;
         loop.quit();
     });
+    connect(&api, &PFXUserApi::updateUserSignalE, [&](QNetworkReply::NetworkError, QString error_str) {
+        qDebug() << "Error happened while issuing request : " << error_str;
+        loop.quit();
+    });
 
     auto johndoe = createRandomUser();
     johndoe.setUsername("johndoe");