diff --git a/gazu/person.py b/gazu/person.py
index 5ca9e20e..a9841e60 100644
--- a/gazu/person.py
+++ b/gazu/person.py
@@ -95,15 +95,15 @@ def get_department_by_name(name, client=default):
 
 
 @cache
-def get_department(id, client=default):
+def get_department(department_id, client=default):
     """
     Args:
-        id (str): An uuid identifying a department.
+        department_id (str): An uuid identifying a department.
 
     Returns:
-        dict: Department corresponding to given id.
+        dict: Department corresponding to given department_id.
     """
-    return raw.fetch_first("departments", {"id": id}, client=client)
+    return raw.fetch_one("departments", department_id, client=client)
 
 
 @cache
diff --git a/tests/test_person.py b/tests/test_person.py
index 717bd03d..5bbaad7b 100644
--- a/tests/test_person.py
+++ b/tests/test_person.py
@@ -53,6 +53,39 @@ def test_get_person_by_full_name(self):
             person = gazu.person.get_person_by_full_name("", "John", "Doe")
             self.assertEqual(person["id"], "person-1")
 
+    def test_get_department_by_name(self):
+        with requests_mock.mock() as mock:
+            mock_route(
+                mock,
+                "GET",
+                "data/departments?name=department-1",
+                text=[{"name": "department-1"}],
+            )
+            department = gazu.person.get_department_by_name("department-1")
+            self.assertEqual(department["name"], "department-1")
+
+    def test_get_department(self):
+        with requests_mock.mock() as mock:
+            mock_route(
+                mock,
+                "GET",
+                "data/departments/%s" % fakeid("department-1"),
+                text={"name": "department-1"},
+            )
+            department = gazu.person.get_department(fakeid("department-1"))
+            self.assertEqual(department["name"], "department-1")
+
+    def test_new_department(self):
+        with requests_mock.mock() as mock:
+            result = {"name": "department-1"}
+            mock_route(
+                mock, "GET", "data/departments?name=department-1", text=[]
+            )
+            mock_route(mock, "POST", "data/departments", text=result)
+            self.assertEqual(
+                gazu.person.new_department("department-1"), result
+            )
+
     def test_get_person_by_desktop_login(self):
         with requests_mock.mock() as mock:
             mock.get(