diff --git a/passerelle_imio_extra_fees/tests/test_extra_fees.py b/passerelle_imio_extra_fees/tests/test_extra_fees.py
new file mode 100644
index 0000000..b9c0a3c
--- /dev/null
+++ b/passerelle_imio_extra_fees/tests/test_extra_fees.py
@@ -0,0 +1,41 @@
+# DJANGO_SETTINGS_MODULE=passerelle.settings PASSERELLE_SETTINGS_FILE=tests/settings.py py.test --pdb
+
+import pytest
+import django_webtest
+
+from django.contrib.contenttypes.models import ContentType
+from passerelle_imio_extra_fees.models import ExtraFees
+from passerelle.base.models import ApiUser, AccessRight
+
+@pytest.fixture
+def app(request):
+    # creation de l'application Django
+    wtm = django_webtest.WebTestMixin()
+    wtm._patch_settings()
+    request.addfinalizer(wtm._unpatch_settings)
+    return django_webtest.DjangoTestApp()
+
+@pytest.fixture
+def connector(db):
+    # creation du connecteur et ouverture de la permission "can_access" sans authentification.
+    connector = ExtraFees.objects.create(slug='test')
+    api = ApiUser.objects.create(username='all', keytype='', key='')
+    obj_type = ContentType.objects.get_for_model(connector)
+    AccessRight.objects.create(
+            codename='can_access', apiuser=api,
+            resource_type=obj_type, resource_pk=connector.pk)
+    return connector
+
+def test_zero_fees_compute(app, connector):
+    dic ={'data':[]}
+    resp = app.post_json('/extra-fees/test/compute', params=dic)
+    assert resp.json.get('data')[0].get('amount') == '0.00'
+
+def test_fees_compute(app, connector):
+    connector.max_doc_in_letter = 5
+    connector.belgium_postage_fee = '0.5'
+    connector.save()
+    nb_document = 18
+    dic ={'data':[{'request_data':{'nb_documents':nb_document,'postage_fee':connector.belgium_postage_fee}}]}
+    resp = app.post_json('/extra-fees/test/compute', params=dic)
+    assert resp.json.get('data')[0].get('amount') == '2.00'