diff --git a/src/fastcs/transport/epics/ioc.py b/src/fastcs/transport/epics/ioc.py
index f4bebb8..0d70632 100644
--- a/src/fastcs/transport/epics/ioc.py
+++ b/src/fastcs/transport/epics/ioc.py
@@ -1,5 +1,4 @@
 import asyncio
-import warnings
 from collections.abc import Callable
 from types import MethodType
 from typing import Any, Literal
diff --git a/src/fastcs/transport/tango/dsr.py b/src/fastcs/transport/tango/dsr.py
index f38c56e..0e0d62b 100644
--- a/src/fastcs/transport/tango/dsr.py
+++ b/src/fastcs/transport/tango/dsr.py
@@ -32,14 +32,6 @@ async def fget(tango_device: Device):
     return fget
 
 
-def _tango_display_format(attribute: Attribute) -> str:
-    match attribute.datatype:
-        case Float(prec):
-            return f"%.{prec}"
-
-    return "6.2f"  # `tango.server.attribute` default for `format`
-
-
 async def _run_threadsafe_blocking(
     coro: Coroutine[Any, Any, Any], loop: asyncio.AbstractEventLoop
 ) -> None:
@@ -59,9 +51,9 @@ def _wrap_updater_fset(
 ) -> Callable[[Any, Any], Any]:
     cast_method = get_cast_method_from_tango_type(attribute.datatype)
 
-    async def fset(tango_device: Device, val):
+    async def fset(tango_device: Device, value):
         tango_device.info_stream(f"called fset method: {attr_name}")
-        coro = attribute.process(val)
+        coro = attribute.process(cast_method(value))
         await _run_threadsafe_blocking(coro, loop)
 
     return fset
diff --git a/tests/conftest.py b/tests/conftest.py
index acf8619..7169c80 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -10,14 +10,9 @@
 import pytest
 from aioca import purge_channel_caches
 
-from fastcs.attributes import AttrR, AttrRW, AttrW, Handler, Sender, Updater
-from fastcs.controller import Controller, SubController
-from fastcs.datatypes import Bool, Float, Int, String
-from fastcs.transport.tango.dsr import register_dev
-from fastcs.datatypes import Bool, Enum, Float, Int, String, WaveForm
-from fastcs.wrappers import command, scan
 from fastcs.attributes import AttrR, AttrRW, AttrW
 from fastcs.datatypes import Bool, Float, Int, String
+from fastcs.transport.tango.dsr import register_dev
 from tests.assertable_controller import (
     TestController,
     TestHandler,
diff --git a/tests/transport/tango/test_dsr.py b/tests/transport/tango/test_dsr.py
index 374664f..13f03c0 100644
--- a/tests/transport/tango/test_dsr.py
+++ b/tests/transport/tango/test_dsr.py
@@ -1,7 +1,6 @@
 import asyncio
-from unittest import mock
-
 import enum
+from unittest import mock
 
 import numpy as np
 import pytest
@@ -22,6 +21,8 @@
 
 async def patch_run_threadsafe_blocking(coro, loop):
     await coro
+
+
 class TangoAssertableController(AssertableController):
     read_int = AttrR(Int(), handler=TestUpdater())
     read_write_int = AttrRW(Int(), handler=TestHandler())
@@ -34,6 +35,11 @@ class TangoAssertableController(AssertableController):
     two_d_waveform = AttrRW(WaveForm(np.int32, (10, 10)))
 
 
+@pytest.fixture(scope="class")
+def assertable_controller(class_mocker: MockerFixture):
+    return TangoAssertableController(class_mocker)
+
+
 class TestTangoDevice:
     @pytest.fixture(scope="class")
     def tango_context(self, assertable_controller):