diff --git a/tests/test_routes/test_item_type.py b/tests/test_routes/test_item_type.py
index 8dd0806..764335a 100644
--- a/tests/test_routes/test_item_type.py
+++ b/tests/test_routes/test_item_type.py
@@ -29,14 +29,12 @@ def test_create_item_type(client, item_type_fixture, item_n, response_status):
 
 
 def test_get_item_type(client, item_type_fixture):
-    # 200_OK as any item types are found
     get_response = client.get(url)
     assert get_response.status_code == status.HTTP_200_OK
     response = client.delete(f"{url}/{item_type_fixture[0].id}")
     assert response.status_code == status.HTTP_200_OK
     response = client.delete(f"{url}/{item_type_fixture[1].id}")
     assert response.status_code == status.HTTP_200_OK
-    # 404_NOT_FOUND as no item types are found
     get_response = client.get(url)
     assert get_response.status_code == status.HTTP_404_NOT_FOUND
 
@@ -62,8 +60,10 @@ def test_get_item_type_id(client, item_n, item_type_fixture, response_status):
     [
         (0, {"name": True}, status.HTTP_422_UNPROCESSABLE_ENTITY),
         (1, {"name": "TestOK"}, status.HTTP_200_OK),
-        # Non-existent id
+        # Несуществующий id
         (2, {"name": "TestBAD"}, status.HTTP_404_NOT_FOUND),
+        # Некорректный ввод
+        (0, {}, status.HTTP_422_UNPROCESSABLE_ENTITY),
     ],
 )
 def test_update_item_type(client, dbsession, item_n, body, item_type_fixture, response_status):
@@ -78,36 +78,54 @@ def test_update_item_type(client, dbsession, item_n, body, item_type_fixture, re
         assert json_response["name"] == body["name"]
 
 
+@pytest.mark.parametrize(
+    'item_n,count,response_status',
+    [
+        (0, 1, status.HTTP_200_OK),
+        (0, 0, status.HTTP_200_OK),
+        (0, 2, status.HTTP_200_OK),
+        (0, 100, status.HTTP_200_OK),
+        (1, 5, status.HTTP_200_OK),
+        # Несуществующий id
+        (2, 1, status.HTTP_404_NOT_FOUND),
+        # Некорректное число
+        (0, -1, status.HTTP_422_UNPROCESSABLE_ENTITY),
+    ],
+)
+def test_update_item_type_available(client, item_n, count, items_with_same_type_id, response_status):
+    type_id = -100000
+    if item_n < len(items_with_same_type_id):
+        type_id = items_with_same_type_id[item_n].id
+    response = client.patch(f"{url}/available/{type_id}", params={"count": count})
+    assert response.status_code == response_status
+    if response.status_code == status.HTTP_200_OK:
+        data = response.json()
+        assert data["total_available"] == min(count, len(items_with_same_type_id[item_n].items))
+
+
 @pytest.mark.parametrize(
     'item_n,response_status',
     [
-        # Есть один item available
         (0, status.HTTP_200_OK),
-        # type_id без items
-        (1, status.HTTP_404_NOT_FOUND),
-        # Несуществующий type_id
+        (1, status.HTTP_200_OK),
         (2, status.HTTP_404_NOT_FOUND),
     ],
 )
-def test_update_item_type_available(client, item_n, items_with_same_type_id, response_status):
+def test_delete_item_type(client, item_type_fixture, item_n, response_status):
     type_id = -100000
-    if item_n < len(items_with_same_type_id):
-        type_id = items_with_same_type_id[item_n].id
-    response = client.patch(f"{url}/available/{type_id}")
+    if item_n < len(item_type_fixture):
+        type_id = item_type_fixture[item_n].id
+    response = client.delete(f"{url}/{type_id}")
     assert response.status_code == response_status
     if response.status_code == status.HTTP_200_OK:
-        response = client.patch(f"{url}/available/{type_id}")
+        response = client.get(f"{url}/{type_id}")
         assert response.status_code == status.HTTP_404_NOT_FOUND
 
 
-def test_delete_item_type(client, item_type_fixture):
-    response = client.delete(f"{url}/{item_type_fixture[0].id}")
+def test_delete_item_type_with_items(client, items_with_same_type_id):
+    type_id = items_with_same_type_id[0].id
+    response = client.delete(f"{url}/{type_id}")
+    # Есть неудаленные items для данного item_type
+    assert response.status_code == status.HTTP_403_FORBIDDEN
+    response = client.get(f"{url}/{type_id}")
     assert response.status_code == status.HTTP_200_OK
-    # checking if items are not deleted
-    assert item_type_fixture[0].items == []
-    # trying to delete deleted
-    response = client.delete(f"{url}/{item_type_fixture[0].id}")
-    assert response.status_code == status.HTTP_404_NOT_FOUND
-    # trying to get deleted
-    response = client.get(f'{url}/{item_type_fixture[0].id}')
-    assert response.status_code == status.HTTP_404_NOT_FOUND