diff --git a/tests/test_graphql/test_api_storage.py b/tests/test_graphql/test_api_storage.py
new file mode 100644
index 0000000..98c75f0
--- /dev/null
+++ b/tests/test_graphql/test_api_storage.py
@@ -0,0 +1,342 @@
+import pytest
+
+
+class BlockDeviceMockReturnNone:
+    """Mock BlockDevices"""
+
+    def __init__(self, *args, **kwargs):
+        self.args = args
+        self.kwargs = kwargs
+
+    def mount(self):
+        return None
+
+    def unmount(self):
+        return None
+
+    def resize(self):
+        return None
+
+    returncode = 0
+
+
+class BlockDeviceMockReturnTrue:
+    """Mock BlockDevices"""
+
+    def __init__(self, *args, **kwargs):
+        self.args = args
+        self.kwargs = kwargs
+
+    def mount(self):
+        return True
+
+    def unmount(self):
+        return True
+
+    def resize(self):
+        return True
+
+    returncode = 0
+
+
+class BlockDeviceMockReturnFalse:
+    """Mock BlockDevices"""
+
+    def __init__(self, *args, **kwargs):
+        self.args = args
+        self.kwargs = kwargs
+
+    def mount(self):
+        return False
+
+    def unmount(self):
+        return False
+
+    def resize(self):
+        return False
+
+    returncode = 0
+
+
+class BlockDevicesMockReturnTrue:
+    def get_block_device(name: str):  # type: ignore
+        return BlockDeviceMockReturnTrue()
+
+    def __new__(cls, *args, **kwargs):
+        pass
+
+    def __init__(self):
+        pass
+
+
+class BlockDevicesMockReturnNone:
+    def get_block_device(name: str):  # type: ignore
+        return None
+
+    def __new__(cls, *args, **kwargs):
+        pass
+
+    def __init__(self):
+        pass
+
+
+@pytest.fixture
+def mock_block_devices_return_true(mocker):
+    mock = mocker.patch(
+        "selfprivacy_api.graphql.mutations.storage_mutations.BlockDevices",
+        # "selfprivacy_api.utils.block_devices.BlockDevices",
+        autospec=True,
+        return_value=BlockDevicesMockReturnTrue,
+    )
+    return mock
+
+
+@pytest.fixture
+def mock_block_devices_return_none(mocker):
+    mock = mocker.patch(
+        "selfprivacy_api.utils.block_devices.BlockDevices",
+        autospec=True,
+        return_value=BlockDevicesMockReturnNone,
+    )
+    return mock
+
+
+@pytest.fixture
+def mock_block_device_return_none(mocker):
+    mock = mocker.patch(
+        "selfprivacy_api.utils.block_devices.BlockDevice",
+        autospec=True,
+        return_value=BlockDeviceMockReturnNone,
+    )
+    return mock
+
+
+@pytest.fixture
+def mock_block_device_return_true(mocker):
+    mock = mocker.patch(
+        "selfprivacy_api.utils.block_devices.BlockDevice",
+        autospec=True,
+        return_value=BlockDeviceMockReturnTrue,
+    )
+    return mock
+
+
+@pytest.fixture
+def mock_block_device_return_false(mocker):
+    mock = mocker.patch(
+        "selfprivacy_api.utils.block_devices.BlockDevice",
+        autospec=True,
+        return_value=BlockDeviceMockReturnFalse,
+    )
+    return mock
+
+
+API_RESIZE_VOLUME_MUTATION = """
+mutation resizeVolume($name: String!) {
+    resizeVolume(name: $name) {
+        success
+        message
+        code
+    }
+}
+"""
+
+
+def test_graphql_resize_volumea_unathorized_client(
+    client, mock_block_devices_return_true
+):
+    response = client.post(
+        "/graphql",
+        json={
+            "query": API_RESIZE_VOLUME_MUTATION,
+            "variables": {"name": "sdx"},
+        },
+    )
+    assert response.status_code == 200
+    assert response.json().get("data") is None
+
+
+def test_graphql_resize_volume_nonexistent_block_device(
+    authorized_client, mock_block_devices_return_none
+):
+    response = authorized_client.post(
+        "/graphql",
+        json={
+            "query": API_RESIZE_VOLUME_MUTATION,
+            "variables": {"name": "sdx"},
+        },
+    )
+    assert response.status_code == 200
+    assert response.json().get("data") is not None
+
+    assert response.json()["data"]["resizeVolume"]["code"] == 404
+    assert response.json()["data"]["resizeVolume"]["message"] is not None
+    assert response.json()["data"]["resizeVolume"]["success"] is False
+
+
+def test_graphql_resize_volume(authorized_client, mock_block_devices_return_true):
+    response = authorized_client.post(
+        "/graphql",
+        json={
+            "query": API_RESIZE_VOLUME_MUTATION,
+            "variables": {"name": "sdx"},
+        },
+    )
+    assert response.status_code == 200
+    assert response.json().get("data") is not None
+
+    assert response.json()["data"]["resizeVolume"]["code"] == 200
+    assert response.json()["data"]["resizeVolume"]["message"] is not None
+    assert response.json()["data"]["resizeVolume"]["success"] is True
+
+
+API_MOUNT_VOLUME_MUTATION = """
+mutation mountVolume($name: String!) {
+    mountVolume(name: $name) {
+        success
+        message
+        code
+    }
+}
+"""
+
+
+def test_graphql_mount_volume_unathorized_client(client, mock_block_device_return_true):
+    response = client.post(
+        "/graphql",
+        json={
+            "query": API_MOUNT_VOLUME_MUTATION,
+            "variables": {"name": "sdx"},
+        },
+    )
+    assert response.status_code == 200
+    assert response.json().get("data") is None
+
+
+def test_graphql_mount_already_mounted_volume(
+    authorized_client, mock_block_devices_return_none
+):
+    response = authorized_client.post(
+        "/graphql",
+        json={
+            "query": API_MOUNT_VOLUME_MUTATION,
+            "variables": {"name": "sdx"},
+        },
+    )
+    assert response.status_code == 200
+    assert response.json().get("data") is not None
+
+    assert response.json()["data"]["mountVolume"]["code"] == 404
+    assert response.json()["data"]["mountVolume"]["message"] is not None
+    assert response.json()["data"]["mountVolume"]["success"] is False
+
+
+def test_graphql_mount_not_found_volume(
+    authorized_client, mock_block_devices_return_none
+):
+    response = authorized_client.post(
+        "/graphql",
+        json={
+            "query": API_MOUNT_VOLUME_MUTATION,
+            "variables": {"name": "sdx"},
+        },
+    )
+    assert response.status_code == 200
+    assert response.json().get("data") is not None
+
+    assert response.json()["data"]["mountVolume"]["code"] == 404
+    assert response.json()["data"]["mountVolume"]["message"] is not None
+    assert response.json()["data"]["mountVolume"]["success"] is False
+
+
+def test_graphql_mount_volume(authorized_client, mock_block_devices_return_true):
+    response = authorized_client.post(
+        "/graphql",
+        json={
+            "query": API_MOUNT_VOLUME_MUTATION,
+            "variables": {"name": "sdx"},
+        },
+    )
+    assert response.status_code == 200
+    assert response.json().get("data") is not None
+
+    assert response.json()["data"]["mountVolume"]["code"] == 200
+    assert response.json()["data"]["mountVolume"]["message"] is not None
+    assert response.json()["data"]["mountVolume"]["success"] is True
+
+
+API_UNMOUNT_VOLUME_MUTATION = """
+mutation unmountVolume($name: String!) {
+    unmountVolume(name: $name) {
+        success
+        message
+        code
+    }
+}
+"""
+
+
+def test_graphql_unmount_volume_unathorized_client(
+    client, mock_block_devices_return_true
+):
+    response = client.post(
+        "/graphql",
+        json={
+            "query": API_UNMOUNT_VOLUME_MUTATION,
+            "variables": {"name": "sdx"},
+        },
+    )
+    assert response.status_code == 200
+    assert response.json().get("data") is None
+
+
+def test_graphql_unmount_not_fount_volume(
+    authorized_client, mock_block_devices_return_true
+):
+    response = authorized_client.post(
+        "/graphql",
+        json={
+            "query": API_UNMOUNT_VOLUME_MUTATION,
+            "variables": {"name": "sdx"},
+        },
+    )
+    assert response.status_code == 200
+    assert response.json().get("data") is not None
+
+    assert response.json()["data"]["unmountVolume"]["code"] == 404
+    assert response.json()["data"]["unmountVolume"]["message"] is not None
+    assert response.json()["data"]["unmountVolume"]["success"] is False
+
+
+def test_graphql_unmount_volume_false(
+    authorized_client, mock_block_devices_return_true
+):
+    response = authorized_client.post(
+        "/graphql",
+        json={
+            "query": API_UNMOUNT_VOLUME_MUTATION,
+            "variables": {"name": "sdx"},
+        },
+    )
+    assert response.status_code == 200
+    assert response.json().get("data") is not None
+
+    assert response.json()["data"]["unmountVolume"]["code"] == 404
+    assert response.json()["data"]["unmountVolume"]["message"] is not None
+    assert response.json()["data"]["unmountVolume"]["success"] is False
+
+
+def test_graphql_unmount_volume(authorized_client, mock_block_devices_return_true):
+    response = authorized_client.post(
+        "/graphql",
+        json={
+            "query": API_UNMOUNT_VOLUME_MUTATION,
+            "variables": {"name": "sdx"},
+        },
+    )
+    assert response.status_code == 200
+    assert response.json().get("data") is not None
+
+    assert response.json()["data"]["unmountVolume"]["code"] == 200
+    assert response.json()["data"]["unmountVolume"]["message"] is not None
+    assert response.json()["data"]["unmountVolume"]["success"] is True