diff --git a/ereuse_devicehub/resources/event/models.py b/ereuse_devicehub/resources/event/models.py
index 71be088b..fae4303a 100644
--- a/ereuse_devicehub/resources/event/models.py
+++ b/ereuse_devicehub/resources/event/models.py
@@ -841,9 +841,9 @@ class VisualTest(TestMixin, Test):
     """The act of visually inspecting the appearance and functionality
     of the device.
     """
-    appearance_range = Column(DBEnum(AppearanceRange))
+    appearance_range = Column(DBEnum(AppearanceRange), nullable=False)
     appearance_range.comment = AppearanceRange.__doc__
-    functionality_range = Column(DBEnum(FunctionalityRange))
+    functionality_range = Column(DBEnum(FunctionalityRange), nullable=False)
     functionality_range.comment = FunctionalityRange.__doc__
     labelling = Column(Boolean)
     labelling.comment = """Whether there are tags to be removed."""
diff --git a/ereuse_devicehub/resources/event/models.pyi b/ereuse_devicehub/resources/event/models.pyi
index e6ef5165..f3af7551 100644
--- a/ereuse_devicehub/resources/event/models.pyi
+++ b/ereuse_devicehub/resources/event/models.pyi
@@ -303,10 +303,16 @@ class TestBios(Test):
 
 
 class VisualTest(Test):
-    appearance_range = ...  # type: AppearanceRange
-    functionality_range = ...  # type: FunctionalityRange
+    appearance_range = ...  # type: Column
+    functionality_range = ...  # type: Column
     labelling = ...  # type: Column
 
+    def __init__(self, **kwargs) -> None:
+        super().__init__(**kwargs)
+        self.appearance_range = ... # type: AppearanceRange
+        self.functionality_range = ... # type: FunctionalityRange
+        self.labelling = ... # type: Optional[bool]
+
 
 class Rate(EventWithOneDevice):
     N = 2
@@ -335,10 +341,10 @@ class RateComputer(Rate):
 
     def __init__(self, **kwargs) -> None:
         super().__init__(**kwargs)
-        self.processor = ...  # type: float
-        self.ram = ...  # type: float
-        self.data_storage = ...  # type: float
-        self.graphic_card = ...  # type: float
+        self.processor = ...  # type: Optional[float]
+        self.ram = ...  # type: Optional[float]
+        self.data_storage = ...  # type: Optional[float]
+        self.graphic_card = ...  # type: Optional[float]
 
     @classmethod
     def compute(cls, device: Device) -> Tuple[RateComputer, EreusePrice]:
diff --git a/ereuse_devicehub/resources/event/rate/workbench/v1_0.py b/ereuse_devicehub/resources/event/rate/workbench/v1_0.py
index ebd53e80..5b47a91c 100644
--- a/ereuse_devicehub/resources/event/rate/workbench/v1_0.py
+++ b/ereuse_devicehub/resources/event/rate/workbench/v1_0.py
@@ -1,4 +1,4 @@
-from enum import Enum
+from enum import Enum, unique
 from itertools import groupby
 from typing import Dict, Iterable, Tuple
 
@@ -17,26 +17,21 @@ class RateAlgorithm(BaseRate):
     which then calls this.
     """
 
-    class Range(Enum):
-        @classmethod
-        def from_devicehub(cls, r: Enum):
-            return getattr(cls, r.name) if r else cls.NONE
-
-    class Appearance(Range):
+    @unique
+    class Appearance(Enum):
         Z = 0.5
         A = 0.3
         B = 0
         C = -0.2
         D = -0.5
         E = -1.0
-        NONE = -0.3
 
-    class Functionality(Range):
+    @unique
+    class Functionality(Enum):
         A = 0.4
         B = -0.5
         C = -0.75
         D = -1
-        NONE = -0.3
 
     def __init__(self) -> None:
         super().__init__()
@@ -55,7 +50,7 @@ class RateAlgorithm(BaseRate):
         assert isinstance(device, Computer), 'Can only rate computers'
 
         try:
-            test_visual = device.last_event_of(VisualTest)
+            visual_test = device.last_event_of(VisualTest)
         except LookupError:
             raise CannotRate('You need a visual test.')
 
@@ -75,10 +70,8 @@ class RateAlgorithm(BaseRate):
                 setattr(rate, field, result)
 
         rate_components = self.harmonic_mean_rates(rate.processor, rate.data_storage, rate.ram)
-        rate.appearance = self.Appearance.from_devicehub(test_visual.appearance_range).value
-        rate.functionality = self.Functionality.from_devicehub(
-            test_visual.functionality_range).value
-
+        rate.appearance = self.Appearance[visual_test.appearance_range.name].value
+        rate.functionality = self.Functionality[visual_test.functionality_range.name].value
         rate.rating = rate_components + rate.functionality + rate.appearance
         device.events_one.add(rate)
         assert 0 <= rate.rating <= 4.7, 'Rate ranges from 0 to 4.7'
@@ -94,6 +87,7 @@ class ProcessorRate(BaseRate):
 
     DEFAULT_CORES = 1
     DEFAULT_SPEED = 1.6
+
     # In case of i2, i3,.. result penalized.
     # Intel(R) Core(TM) i3 CPU 530 @ 2.93GHz, score = 23406.92 but results inan score of 17503.
     DEFAULT_SCORE = 4000
@@ -103,15 +97,12 @@ class ProcessorRate(BaseRate):
             Obs: cores and speed are possible NULL value
             :return: result is a rate (score) of Processor characteristics
         """
-        # todo jn? for processor_device in processors; more than one processor
         cores = processor.cores or self.DEFAULT_CORES
         speed = processor.speed or self.DEFAULT_SPEED
-        # todo jn? fix StopIteration if don't exists BenchmarkProcessor
         benchmark_cpu = next(
             e for e in reversed(processor.events)
             if isinstance(e, BenchmarkProcessor) and not isinstance(e, BenchmarkProcessorSysbench)
         )
-        # todo jn? fix if benchmark_cpu.rate == 0
         benchmark_cpu = benchmark_cpu.rate or self.DEFAULT_SCORE
 
         # STEP: Fusion components
diff --git a/ereuse_devicehub/resources/event/schemas.py b/ereuse_devicehub/resources/event/schemas.py
index 0f12e7f3..0aaee983 100644
--- a/ereuse_devicehub/resources/event/schemas.py
+++ b/ereuse_devicehub/resources/event/schemas.py
@@ -204,8 +204,10 @@ class TestBios(Test):
 
 class VisualTest(Test):
     __doc__ = m.VisualTest.__doc__
-    appearance_range = EnumField(AppearanceRange, data_key='appearanceRange')
-    functionality_range = EnumField(FunctionalityRange, data_key='functionalityRange')
+    appearance_range = EnumField(AppearanceRange, required=True, data_key='appearanceRange')
+    functionality_range = EnumField(FunctionalityRange,
+                                    required=True,
+                                    data_key='functionalityRange')
     labelling = Boolean()
 
 
diff --git a/ereuse_devicehub/resources/event/views.py b/ereuse_devicehub/resources/event/views.py
index 72819176..2f642cb6 100644
--- a/ereuse_devicehub/resources/event/views.py
+++ b/ereuse_devicehub/resources/event/views.py
@@ -68,6 +68,7 @@ class EventView(View):
         assert not device.events_one
         assert all(not c.events_one for c in components) if components else True
         db_device, remove_events = resource_def.sync.run(device, components)
+        del device  # Do not use device anymore
         snapshot.device = db_device
         snapshot.events |= remove_events | events_device  # Set events to snapshot
         # commit will change the order of the components by what
@@ -84,7 +85,7 @@ class EventView(View):
         # Compute ratings
         if snapshot.software == SnapshotSoftware.Workbench:
             try:
-                rate_computer, price = RateComputer.compute(device)
+                rate_computer, price = RateComputer.compute(db_device)
             except CannotRate:
                 pass
             else:
diff --git a/tests/test_event.py b/tests/test_event.py
index fa2aa7bb..a6d7d5a7 100644
--- a/tests/test_event.py
+++ b/tests/test_event.py
@@ -351,34 +351,6 @@ def test_erase_physical():
     db.session.commit()
 
 
-@pytest.mark.xfail(reson='Adapt rate algorithm to re-compute by passing a manual rate.')
-def test_manual_rate_after_workbench_rate(user: UserClient):
-    """Perform a WorkbenchRate and then update the device with a ManualRate.
-
-    Devicehub must make the final rate with the first workbench rate
-    plus the new manual rate, without considering the appearance /
-    functionality values of the workbench rate.
-    """
-    s = file('real-hp.snapshot.11')
-    snapshot, _ = user.post(s, res=models.Snapshot)
-    device, _ = user.get(res=Device, item=snapshot['device']['id'])
-    assert 'B' == device['rate']['appearanceRange']
-    assert device['rate'] == 1
-    user.post({
-        'type': 'ManualRate',
-        'device': device['id'],
-        'appearanceRange': 'A',
-        'functionalityRange': 'A'
-    }, res=models.Event)
-    device, _ = user.get(res=Device, item=snapshot['device']['id'])
-    assert 'A' == device['rate']['appearanceRange']
-
-
-@pytest.mark.xfail(reson='Develop an algorithm that can make rates only from manual rates')
-def test_manual_rate_without_workbench_rate(user: UserClient):
-    pass
-
-
 @pytest.mark.xfail(reson='develop')
 def test_measure_battery():
     """Tests the MeasureBattery."""
diff --git a/tests/test_rate.py b/tests/test_rate.py
index 204ebe2c..640eb20c 100644
--- a/tests/test_rate.py
+++ b/tests/test_rate.py
@@ -5,12 +5,12 @@ import pytest
 
 from ereuse_devicehub.client import UserClient
 from ereuse_devicehub.db import db
-from ereuse_devicehub.resources.device.models import Computer, Desktop, HardDrive, Processor, \
-    RamModule
+from ereuse_devicehub.resources.device.models import Computer, Desktop, Device, HardDrive, \
+    Processor, RamModule
 from ereuse_devicehub.resources.enums import AppearanceRange, ComputerChassis, \
     FunctionalityRange
 from ereuse_devicehub.resources.event.models import BenchmarkDataStorage, BenchmarkProcessor, \
-    RateComputer, Snapshot, VisualTest
+    Event, RateComputer, Snapshot, VisualTest
 from ereuse_devicehub.resources.event.rate.workbench.v1_0 import CannotRate
 from tests import conftest
 from tests.conftest import file
@@ -28,19 +28,32 @@ def test_workbench_rate_db():
     db.session.commit()
 
 
-@pytest.mark.xfail(reason='ComputerRate V1 can only be triggered from Workbench snapshot software')
-def test_rate_workbench_then_manual():
-    """Checks that a new Rate is generated for a snapshot
-    that is not from Workbench.
+@pytest.mark.xfail(reson='Adapt rate algorithm to re-compute by passing a manual rate.')
+def test_manual_rate_after_workbench_rate(user: UserClient):
+    """Perform a WorkbenchRate and then update the device with a ManualRate.
+
+    Devicehub must make the final rate with the first workbench rate
+    plus the new manual rate, without considering the appearance /
+    functionality values of the workbench rate.
     """
+    s = file('real-hp.snapshot.11')
+    snapshot, _ = user.post(s, res=Snapshot)
+    device, _ = user.get(res=Device, item=snapshot['device']['id'])
+    assert 'B' == device['rate']['appearanceRange']
+    assert device['rate'] == 1
+    user.post({
+        'type': 'ManualRate',
+        'device': device['id'],
+        'appearanceRange': 'A',
+        'functionalityRange': 'A'
+    }, res=Event)
+    device, _ = user.get(res=Device, item=snapshot['device']['id'])
+    assert 'A' == device['rate']['appearanceRange']
 
 
 @pytest.mark.usefixtures(conftest.app_context.__name__)
-def test_rate():
-    """Test generating an Rate for a given PC / components /
-    RateComputer ensuring results and relationships between
-    pc - rate - RateComputer - price.
-    """
+def test_price_from_rate():
+    """Tests the price generated from the rate."""
 
     pc = Desktop(chassis=ComputerChassis.Tower)
     hdd = HardDrive(size=476940)
@@ -97,12 +110,13 @@ def test_no_rate_if_no_visual_test(user: UserClient):
     Checks if a rate is calculated from a snapshot without visual test
     """
     # Upload a basic snapshot
-    device = file('basic.snapshot')
+    s = file('basic.snapshot')
     # Delete snapshot device events
-    del device['device']['events']
-    user.post(device, res=Snapshot)
+    del s['device']['events']
+    snapshot, _ = user.post(s, res=Snapshot)
+    device, _ = user.get(res=Device, item=snapshot['device']['id'])
     # How to assert CannotRate Exception
-    assert CannotRate
+    assert 'rate' not in snapshot['device']
 
 
 def test_no_rate_if_device_is_not_computer(user: UserClient):
diff --git a/tests/test_rate_workbench_v1.py b/tests/test_rate_workbench_v1.py
index 4040d8bd..07501f47 100644
--- a/tests/test_rate_workbench_v1.py
+++ b/tests/test_rate_workbench_v1.py
@@ -96,7 +96,6 @@ def test_rate_ram_rate():
 
     ram_rate = RamRate().compute([ram1])
 
-    # todo rel_tol >= 0.002
     assert math.isclose(ram_rate, 2.02, rel_tol=0.002), 'RamRate returns incorrect value(rate)'
 
 
@@ -127,7 +126,6 @@ def test_rate_ram_rate_4modules():
 
     ram_rate = RamRate().compute([ram1, ram2, ram3, ram4])
 
-    # todo rel_tol >= 0.002
     assert math.isclose(ram_rate, 1.993, rel_tol=0.001), 'RamRate returns incorrect value(rate)'
 
 
@@ -158,7 +156,6 @@ def test_rate_ram_speed_is_null():
 
     ram_rate = RamRate().compute([ram0])
 
-    # todo rel_tol >= 0.004
     assert math.isclose(ram_rate, 1.25, rel_tol=0.004), 'RamRate returns incorrect value(rate)'
 
 
@@ -208,7 +205,6 @@ def test_rate_processor_rate_2cores():
 
     processor_rate = ProcessorRate().compute(cpu)
 
-    # todo rel_tol >= 0.002
     assert math.isclose(processor_rate, 3.93, rel_tol=0.002)
 
 
@@ -217,12 +213,10 @@ def test_rate_processor_with_null_cores():
     Test with processor device have null number of cores
     """
     cpu = Processor(cores=None, speed=3.3)
-    # todo try without BenchmarkProcessor, StopIteration problem
     cpu.events_one.add(BenchmarkProcessor())
 
     processor_rate = ProcessorRate().compute(cpu)
 
-    # todo rel_tol >= 0.003
     assert math.isclose(processor_rate, 1.38, rel_tol=0.003)
 
 
diff --git a/tests/test_workbench.py b/tests/test_workbench.py
index 90a1ddba..6631a135 100644
--- a/tests/test_workbench.py
+++ b/tests/test_workbench.py
@@ -168,7 +168,7 @@ def test_real_toshiba_11(user: UserClient):
     snapshot, _ = user.post(res=em.Snapshot, data=s)
 
 
-def test_snapshot_real_eee_1001pxd(user: UserClient):
+def test_snapshot_real_eee_1001pxd_with_rate(user: UserClient):
     """
     Checks the values of the device, components,
     events and their relationships of a real pc.
@@ -297,11 +297,6 @@ def test_real_eee_1000h(user: UserClient):
     snapshot, _ = user.post(res=em.Snapshot, data=s)
 
 
-@pytest.mark.xfail(reason='We do not have a snapshot file to use')
-def test_real_full_with_workbench_rate(user: UserClient):
-    pass
-
-
 SNAPSHOTS_NEED_ID = {
     'box-xavier.snapshot.json',
     'custom.lshw.snapshot.json',