diff --git a/teos/extended_appointment.py b/teos/extended_appointment.py
index 7dd2c65..101b93b 100644
--- a/teos/extended_appointment.py
+++ b/teos/extended_appointment.py
@@ -15,7 +15,7 @@ class ExtendedAppointment(Appointment):
 
         Args:
             appointment_data (:obj:`dict`): a dictionary containing the following keys:
-                ``{locator, to_self_delay, encrypted_blob, expiry}``
+                ``{locator, to_self_delay, encrypted_blob, user_id}``
 
         Returns:
             :obj:`ExtendedAppointment <teos.extended_appointment.ExtendedAppointment>`: An appointment initialized
diff --git a/test/common/unit/test_appointment.py b/test/common/unit/test_appointment.py
index 37f408d..ed0df51 100644
--- a/test/common/unit/test_appointment.py
+++ b/test/common/unit/test_appointment.py
@@ -1,5 +1,6 @@
 import struct
 import binascii
+import pytest
 from pytest import fixture
 
 from common.appointment import Appointment
@@ -29,8 +30,6 @@ def appointment_data():
 def test_init_appointment(appointment_data):
     # The appointment has no checks whatsoever, since the inspector is the one taking care or that, and the only one
     # creating appointments.
-    # DISCUSS: whether this makes sense by design or checks should be ported from the inspector to the appointment
-    #          35-appointment-checks
     appointment = Appointment(
         appointment_data["locator"],
         appointment_data["start_time"],
@@ -78,13 +77,9 @@ def test_from_dict(appointment_data):
         prev_val = appointment_data[key]
         appointment_data[key] = None
 
-        try:
+        with pytest.raises(ValueError, match="Wrong appointment data"):
             Appointment.from_dict(appointment_data)
-            assert False
-
-        except ValueError:
             appointment_data[key] = prev_val
-            assert True
 
 
 def test_serialize(appointment_data):
diff --git a/test/teos/unit/test_extended_appointment.py b/test/teos/unit/test_extended_appointment.py
new file mode 100644
index 0000000..cd00332
--- /dev/null
+++ b/test/teos/unit/test_extended_appointment.py
@@ -0,0 +1,56 @@
+import pytest
+from pytest import fixture
+
+from common.constants import LOCATOR_LEN_BYTES
+from teos.extended_appointment import ExtendedAppointment
+
+from test.common.unit.conftest import get_random_value_hex
+
+
+# Parent methods are not tested.
+@fixture
+def appointment_data():
+    locator = get_random_value_hex(LOCATOR_LEN_BYTES)
+    to_self_delay = 20
+    user_id = get_random_value_hex(16)
+    encrypted_blob_data = get_random_value_hex(100)
+
+    return {
+        "locator": locator,
+        "to_self_delay": to_self_delay,
+        "encrypted_blob": encrypted_blob_data,
+        "user_id": user_id,
+    }
+
+
+def test_init_appointment(appointment_data):
+    # The appointment has no checks whatsoever, since the inspector is the one taking care or that, and the only one
+    # creating appointments.
+    appointment = ExtendedAppointment(
+        appointment_data["locator"],
+        appointment_data["to_self_delay"],
+        appointment_data["encrypted_blob"],
+        appointment_data["user_id"],
+    )
+
+    assert (
+        appointment_data["locator"] == appointment.locator
+        and appointment_data["to_self_delay"] == appointment.to_self_delay
+        and appointment_data["encrypted_blob"] == appointment.encrypted_blob
+        and appointment_data["user_id"] == appointment.user_id
+    )
+
+
+def test_from_dict(appointment_data):
+    # The appointment should be build if we don't miss any field
+    appointment = ExtendedAppointment.from_dict(appointment_data)
+    assert isinstance(appointment, ExtendedAppointment)
+
+    # Otherwise it should fail
+    for key in appointment_data.keys():
+        prev_val = appointment_data[key]
+        appointment_data[key] = None
+
+        with pytest.raises(ValueError, match="Wrong appointment data"):
+            ExtendedAppointment.from_dict(appointment_data)
+            appointment_data[key] = prev_val