diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index dfbe47d54..1083e04c2 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -58,6 +58,7 @@ set(SOURCES
   src/components/camera/Camera.cpp
   src/components/chat/ChatModel.cpp
   src/components/chat/ChatProxyModel.cpp
+  src/components/contact/ContactObserver.cpp
   src/components/contact/ContactModel.cpp
   src/components/contact/VcardModel.cpp
   src/components/contacts/ContactsListModel.cpp
@@ -66,7 +67,6 @@ set(SOURCES
   src/components/notifier/Notifier.cpp
   src/components/settings/AccountSettingsModel.cpp
   src/components/settings/SettingsModel.cpp
-  src/components/sip-address/SipAddressModel.cpp
   src/components/sip-addresses/SipAddressesModel.cpp
   src/components/smart-search-bar/SmartSearchBarModel.cpp
   src/components/timeline/TimelineModel.cpp
@@ -82,6 +82,7 @@ set(HEADERS
   src/components/camera/Camera.hpp
   src/components/chat/ChatModel.hpp
   src/components/chat/ChatProxyModel.hpp
+  src/components/contact/ContactObserver.hpp
   src/components/contact/ContactModel.hpp
   src/components/contact/VcardModel.hpp
   src/components/contacts/ContactsListModel.hpp
@@ -91,7 +92,6 @@ set(HEADERS
   src/components/presence/Presence.hpp
   src/components/settings/AccountSettingsModel.hpp
   src/components/settings/SettingsModel.hpp
-  src/components/sip-address/SipAddressModel.hpp
   src/components/sip-addresses/SipAddressesModel.hpp
   src/components/smart-search-bar/SmartSearchBarModel.hpp
   src/components/timeline/TimelineModel.hpp
diff --git a/tests/src/app/App.cpp b/tests/src/app/App.cpp
index 468bd574d..8d2aa7c71 100644
--- a/tests/src/app/App.cpp
+++ b/tests/src/app/App.cpp
@@ -89,8 +89,8 @@ void App::registerTypes () {
   qmlRegisterUncreatableType<ContactModel>(
     "Linphone", 1, 0, "ContactModel", "ContactModel is uncreatable"
   );
-  qmlRegisterUncreatableType<SipAddressModel>(
-    "Linphone", 1, 0, "SipAddressModel", "SipAddressModel is uncreatable"
+  qmlRegisterUncreatableType<ContactObserver>(
+    "Linphone", 1, 0, "ContactObserver", "ContactObserver is uncreatable"
   );
   qmlRegisterUncreatableType<VcardModel>(
     "Linphone", 1, 0, "VcardModel", "VcardModel is uncreatable"
diff --git a/tests/src/components/contact/ContactObserver.cpp b/tests/src/components/contact/ContactObserver.cpp
new file mode 100644
index 000000000..27415df10
--- /dev/null
+++ b/tests/src/components/contact/ContactObserver.cpp
@@ -0,0 +1,14 @@
+#include "../contact/ContactModel.hpp"
+
+#include "ContactObserver.hpp"
+
+// =============================================================================
+
+ContactObserver::ContactObserver (const QString &sip_address) {
+  m_sip_address = sip_address;
+}
+
+void ContactObserver::setContact (ContactModel *contact) {
+  m_contact = contact;
+  emit contactChanged(contact);
+}
diff --git a/tests/src/components/sip-address/SipAddressModel.hpp b/tests/src/components/contact/ContactObserver.hpp
similarity index 62%
rename from tests/src/components/sip-address/SipAddressModel.hpp
rename to tests/src/components/contact/ContactObserver.hpp
index 1476dc9e4..3c19e3a5f 100644
--- a/tests/src/components/sip-address/SipAddressModel.hpp
+++ b/tests/src/components/contact/ContactObserver.hpp
@@ -1,5 +1,5 @@
-#ifndef SIP_ADDRESS_MODEL_H_
-#define SIP_ADDRESS_MODEL_H_
+#ifndef CONTACT_OBSERVER_H_
+#define CONTACT_OBSERVER_H_
 
 #include <QObject>
 
@@ -7,15 +7,17 @@
 
 class ContactModel;
 
-class SipAddressModel : public QObject {
+class ContactObserver : public QObject {
+  friend class SipAddressesModel;
+
   Q_OBJECT;
 
   Q_PROPERTY(QString sipAddress READ getSipAddress CONSTANT);
   Q_PROPERTY(ContactModel * contact READ getContact NOTIFY contactChanged);
 
 public:
-  SipAddressModel ();
-  ~SipAddressModel () = default;
+  ContactObserver (const QString &sip_address);
+  ~ContactObserver () = default;
 
   ContactModel *getContact () const {
     return m_contact;
@@ -29,10 +31,12 @@ private:
     return m_sip_address;
   }
 
+  void setContact (ContactModel *contact);
+
   QString m_sip_address;
   ContactModel *m_contact = nullptr;
 };
 
-Q_DECLARE_METATYPE(SipAddressModel *);
+Q_DECLARE_METATYPE(ContactObserver *);
 
-#endif // SIP_ADDRESS_MODEL_H_
+#endif // CONTACT_OBSERVER_H_
diff --git a/tests/src/components/sip-address/SipAddressModel.cpp b/tests/src/components/sip-address/SipAddressModel.cpp
deleted file mode 100644
index 5ceaef73c..000000000
--- a/tests/src/components/sip-address/SipAddressModel.cpp
+++ /dev/null
@@ -1,9 +0,0 @@
-#include "../contact/ContactModel.hpp"
-
-#include "SipAddressModel.hpp"
-
-// =============================================================================
-
-SipAddressModel::SipAddressModel () {
-  // TODO
-}
diff --git a/tests/src/components/sip-addresses/SipAddressesModel.cpp b/tests/src/components/sip-addresses/SipAddressesModel.cpp
index 4466b61ab..dd138ccba 100644
--- a/tests/src/components/sip-addresses/SipAddressesModel.cpp
+++ b/tests/src/components/sip-addresses/SipAddressesModel.cpp
@@ -115,6 +115,24 @@ void SipAddressesModel::handleAllHistoryEntriesRemoved () {
 
 // -----------------------------------------------------------------------------
 
+ContactObserver *SipAddressesModel::getContactObserver (const QString &sip_address) {
+  ContactObserver *model = new ContactObserver(sip_address);
+  model->setContact(mapSipAddressToContact(sip_address));
+
+  m_observers.insert(sip_address, model);
+  QObject::connect(
+    model, &ContactObserver::destroyed, this, [this, model]() {
+      const QString &sip_address = model->getSipAddress();
+      if (m_observers.remove(sip_address, model) == 0)
+        qWarning() << QStringLiteral("Unable to remove sip address `%1` from observers.").arg(sip_address);
+    }
+  );
+
+  return model;
+}
+
+// -----------------------------------------------------------------------------
+
 bool SipAddressesModel::removeRow (int row, const QModelIndex &parent) {
   return removeRows(row, 1, parent);
 }
@@ -130,6 +148,7 @@ bool SipAddressesModel::removeRows (int row, int count, const QModelIndex &paren
   for (int i = 0; i < count; ++i) {
     const QVariantMap *map = m_refs.takeAt(row);
     QString sip_address = (*map)["sipAddress"].toString();
+
     qInfo() << QStringLiteral("Remove sip address: `%1`.").arg(sip_address);
     m_sip_addresses.remove(sip_address);
   }
@@ -153,6 +172,8 @@ void SipAddressesModel::updateFromNewContactSipAddress (ContactModel *contact, c
     map["sipAddress"] = sip_address;
     map["contact"] = QVariant::fromValue(contact);
 
+    updateObservers(sip_address, contact);
+
     int row = m_refs.count();
 
     beginInsertRows(QModelIndex(), row, row);
@@ -172,6 +193,8 @@ void SipAddressesModel::updateFromNewContactSipAddress (ContactModel *contact, c
   // Sip address exists, update contact.
   (*it)["contact"] = QVariant::fromValue(contact);
 
+  updateObservers(sip_address, contact);
+
   int row = m_refs.indexOf(&(*it));
   Q_ASSERT(row != -1);
   emit dataChanged(index(row, 0), index(row, 0));
@@ -184,6 +207,8 @@ void SipAddressesModel::tryToRemoveSipAddress (const QString &sip_address) {
     return;
   }
 
+  updateObservers(sip_address, nullptr);
+
   if (it->remove("contact") == 0)
     qWarning() << QStringLiteral("`contact` field is empty on sip address: `%1`.").arg(sip_address);
 
@@ -250,3 +275,10 @@ void SipAddressesModel::fetchSipAddresses () {
   for (auto &contact : CoreManager::getInstance()->getContactsListModel()->m_list)
     updateFromNewContact(contact);
 }
+
+void SipAddressesModel::updateObservers (const QString &sip_address, ContactModel *contact) {
+  for (auto &observer : m_observers.values(sip_address)) {
+    if (contact != observer->getContact())
+      observer->setContact(contact);
+  }
+}
diff --git a/tests/src/components/sip-addresses/SipAddressesModel.hpp b/tests/src/components/sip-addresses/SipAddressesModel.hpp
index 2db68dd84..0df32bd8a 100644
--- a/tests/src/components/sip-addresses/SipAddressesModel.hpp
+++ b/tests/src/components/sip-addresses/SipAddressesModel.hpp
@@ -4,6 +4,7 @@
 #include <QAbstractListModel>
 
 #include "../contact/ContactModel.hpp"
+#include "../contact/ContactObserver.hpp"
 
 // =============================================================================
 
@@ -23,6 +24,8 @@ public slots:
   ContactModel *mapSipAddressToContact (const QString &sip_address) const;
   void handleAllHistoryEntriesRemoved ();
 
+  ContactObserver *getContactObserver (const QString &sip_address);
+
 private:
   bool removeRow (int row, const QModelIndex &parent = QModelIndex());
   bool removeRows (int row, int count, const QModelIndex &parent = QModelIndex()) override;
@@ -33,8 +36,12 @@ private:
 
   void fetchSipAddresses ();
 
+  void updateObservers (const QString &sip_address, ContactModel *contact);
+
   QHash<QString, QVariantMap> m_sip_addresses;
   QList<const QVariantMap *> m_refs;
+
+  QMultiHash<QString, ContactObserver *> m_observers;
 };
 
 #endif // SIP_ADDRESSES_MODEL_H_
diff --git a/tests/ui/modules/Linphone/Chat/Chat.qml b/tests/ui/modules/Linphone/Chat/Chat.qml
index 05f16513c..511b089f1 100644
--- a/tests/ui/modules/Linphone/Chat/Chat.qml
+++ b/tests/ui/modules/Linphone/Chat/Chat.qml
@@ -11,9 +11,7 @@ import Linphone.Styles 1.0
 ColumnLayout {
   property alias proxyModel: chat.model
 
-  property var _contact: SipAddressesModel.mapSipAddressToContact(
-    proxyModel.sipAddress
-  ) || proxyModel.sipAddress
+  property var _contactObserver: SipAddressesModel.getContactObserver(proxyModel.sipAddress)
 
   // ---------------------------------------------------------------------------
 
diff --git a/tests/ui/modules/Linphone/Chat/IncomingMessage.qml b/tests/ui/modules/Linphone/Chat/IncomingMessage.qml
index f75a22282..62aa3077e 100644
--- a/tests/ui/modules/Linphone/Chat/IncomingMessage.qml
+++ b/tests/ui/modules/Linphone/Chat/IncomingMessage.qml
@@ -20,8 +20,8 @@ RowLayout {
     Avatar {
       anchors.centerIn: parent
       height: ChatStyle.entry.message.incoming.avatarSize
-      image: _contact.avatar
-      username: LinphoneUtils.getContactUsername(_contact)
+      image: _contactObserver.contact ? _contactObserver.contact.avatar : ''
+      username: LinphoneUtils.getContactUsername(_contactObserver.contact || _contactObserver.sipAddress)
       width: ChatStyle.entry.message.incoming.avatarSize
     }
   }
diff --git a/tests/ui/views/App/Calls/Incall.qml b/tests/ui/views/App/Calls/Incall.qml
index 7580b0216..89086593e 100644
--- a/tests/ui/views/App/Calls/Incall.qml
+++ b/tests/ui/views/App/Calls/Incall.qml
@@ -16,9 +16,7 @@ Rectangle {
   property bool isVideoCall: false
   property string sipAddress
 
-  property var _contact: SipAddressesModel.mapSipAddressToContact(
-    sipAddress
-  ) || sipAddress
+  property var _contactObserver: SipAddressesModel.getContactObserver(sipAddress)
 
   // ---------------------------------------------------------------------------
 
@@ -58,7 +56,7 @@ Rectangle {
         anchors.centerIn: parent
         horizontalTextAlignment: Text.AlignHCenter
         sipAddress: call.sipAddress
-        username: LinphoneUtils.getContactUsername(_contact)
+        username: LinphoneUtils.getContactUsername(_contactObserver.contact || call.sipAddress)
 
         height: parent.height
         width: parent.width - cameraActions.width - callQuality.width - 150
@@ -110,7 +108,7 @@ Rectangle {
           }
 
           backgroundColor: StartingCallStyle.avatar.backgroundColor
-          image: _contact.vcard.avatar
+          image: _contactObserver.contact ? _contactObserver.contact.vcard.avatar : ''
           username: contactDescription.username
 
           height: _computeAvatarSize()