diff --git a/ophyd_devices/interfaces/base_classes/psi_device_base.py b/ophyd_devices/interfaces/base_classes/psi_device_base.py
index ddc528c..c34e67a 100644
--- a/ophyd_devices/interfaces/base_classes/psi_device_base.py
+++ b/ophyd_devices/interfaces/base_classes/psi_device_base.py
@@ -40,10 +40,10 @@ class PSIDeviceBase(Device):
         super().__init__(name=name, **kwargs)
         self._stopped = False
         self.task_handler = TaskHandler(parent=self)
+        self.file_utils = FileHandler()
         if scan_info is None:
             scan_info = get_mock_scan_info()
         self.scan_info = scan_info
-        self.file_utils = FileHandler()
         self.on_init()
 
     ########################################
diff --git a/ophyd_devices/sim/sim_camera.py b/ophyd_devices/sim/sim_camera.py
index 90022be..00d821d 100644
--- a/ophyd_devices/sim/sim_camera.py
+++ b/ophyd_devices/sim/sim_camera.py
@@ -109,7 +109,7 @@ class SimCamera(PSIDeviceBase, SimCameraControl):
         FYI: No data is written to disk in the simulation, but upon each trigger it
         is published to the device_monitor endpoint in REDIS.
         """
-        self.file_path = self.file_utils.get_file_path(
+        self.file_path = self.file_utils.get_full_path(
             scan_status_msg=self.scan_info.msg, name=self.name
         )
         self.frames.set(
diff --git a/ophyd_devices/utils/psi_device_base_utils.py b/ophyd_devices/utils/psi_device_base_utils.py
index 437a7a5..5dc42d7 100644
--- a/ophyd_devices/utils/psi_device_base_utils.py
+++ b/ophyd_devices/utils/psi_device_base_utils.py
@@ -7,12 +7,12 @@ import uuid
 from enum import Enum
 from typing import TYPE_CHECKING
 
-from bec_lib.file_utils import get_full_file_path
+from bec_lib.file_utils import get_full_path
 from bec_lib.logger import bec_logger
 from bec_lib.utils.import_utils import lazy_import_from
-from ophyd import Device, DeviceStatus, StatusBase
+from ophyd import Device, DeviceStatus
 
-if TYPE_CHECKING:
+if TYPE_CHECKING:  # pragma: no cover
     from bec_lib.messages import ScanStatusMessage
 else:
     # TODO: put back normal import when Pydantic gets faster
@@ -180,7 +180,7 @@ class TaskHandler:
 class FileHandler:
     """Utility class for file operations."""
 
-    def get_file_path(
+    def get_full_path(
         self, scan_status_msg: ScanStatusMessage, name: str, create_dir: bool = True
     ) -> str:
         """Get the file path.
@@ -190,4 +190,4 @@ class FileHandler:
             name: The name of the file.
             create_dir: Whether to create the directory.
         """
-        return get_full_file_path(scan_status_msg=scan_status_msg, name=name, create_dir=create_dir)
+        return get_full_path(scan_status_msg=scan_status_msg, name=name, create_dir=create_dir)
diff --git a/tests/test_simulation.py b/tests/test_simulation.py
index 589701f..cf61855 100644
--- a/tests/test_simulation.py
+++ b/tests/test_simulation.py
@@ -11,7 +11,9 @@ import h5py
 import numpy as np
 import pytest
 from bec_lib import messages
+from bec_lib.devicemanager import ScanInfo
 from bec_lib.endpoints import MessageEndpoints
+from bec_lib.file_utils import compile_file_components
 from bec_server.device_server.tests.utils import DMMock
 from ophyd import Device, Signal
 from ophyd.status import wait as status_wait
@@ -24,7 +26,9 @@ from ophyd_devices.interfaces.protocols.bec_protocols import (
 )
 from ophyd_devices.sim.sim_camera import SimCamera
 from ophyd_devices.sim.sim_flyer import SimFlyer
-from ophyd_devices.sim.sim_frameworks import H5ImageReplayProxy, SlitProxy, StageCameraProxy
+from ophyd_devices.sim.sim_frameworks.h5_image_replay_proxy import H5ImageReplayProxy
+from ophyd_devices.sim.sim_frameworks.slit_proxy import SlitProxy
+from ophyd_devices.sim.sim_frameworks.stage_camera_proxy import StageCameraProxy
 from ophyd_devices.sim.sim_monitor import SimMonitor, SimMonitorAsync
 from ophyd_devices.sim.sim_positioner import SimLinearTrajectoryPositioner, SimPositioner
 from ophyd_devices.sim.sim_signals import ReadOnlySignal
@@ -61,7 +65,7 @@ def monitor(name="monitor"):
 def camera(name="camera"):
     """Fixture for SimCamera."""
     dm = DMMock()
-    cam = SimCamera(name=name, device_manager=dm)
+    cam = SimCamera(name=name, device_manager=dm, scan_info=ScanInfo)
     cam.filewriter = mock.MagicMock()
     cam.filewriter.compile_full_filename.return_value = ""
     yield cam
@@ -408,6 +412,14 @@ def test_BECDeviceBase():
 
 def test_h5proxy(h5proxy_fixture):
     """Test h5 camera proxy read from h5 file"""
+    msg = messages.ScanStatusMessage(
+        scan_id="test",
+        num_points=10,
+        scan_number=1,
+        status="open",
+        info={},
+        scan_parameters={"frames_per_trigger": 1, "exp_time": 1},
+    )
     h5proxy, camera = h5proxy_fixture
     mock_proxy = mock.MagicMock()
     camera.device_manager.devices.update({h5proxy.name: mock_proxy})
@@ -425,10 +437,14 @@ def test_h5proxy(h5proxy_fixture):
     camera.sim.params = {"noise": "none", "noise_multiplier": 0}
     # pylint: disable=no-member
     camera.image_shape.set(data.shape[1:])
-    camera.stage()
-    img = camera.image.get()
-    assert (img == data[0, ...]).all()
-    camera.unstage()
+    with (
+        mock.patch.object(camera.file_utils, "get_full_path", return_value="/tmp/path"),
+        mock.patch.object(camera.scan_info, "msg", return_value=msg),
+    ):
+        camera.stage()
+        img = camera.image.get()
+        assert (img == data[0, ...]).all()
+        camera.unstage()
 
 
 def test_slitproxy(slitproxy_fixture):
@@ -539,13 +555,34 @@ def test_stage_camera_proxy_image_shape(
 
 def test_cam_stage_h5writer(camera):
     """Test the H5Writer class"""
+    file_dir = None
+    suffix = None
+    msg = messages.ScanStatusMessage(
+        scan_id="test",
+        num_points=10,
+        scan_number=1,
+        status="open",
+        info={},
+        scan_parameters={
+            "frames_per_trigger": 1,
+            "exp_time": 1,
+            "system_config": {"file_directory": file_dir, "file_suffix": suffix},
+            "file_components": compile_file_components(
+                base_path="./test", scan_nr=1, file_directory=file_dir, user_suffix=suffix
+            ),
+        },
+    )
     with (
         mock.patch.object(camera, "h5_writer") as mock_h5_writer,
         mock.patch.object(camera, "_run_subs") as mock_run_subs,
+        mock.patch.object(camera.scan_info, "msg", return_value=msg),
+        mock.patch.object(
+            camera.file_utils, "get_full_path", return_value="./data/test_file_camera.h5"
+        ),
     ):
-        camera.scan_info.msg.num_points = 10
-        camera.scan_info.msg.scan_parameters["frames_per_trigger"] = 1
-        camera.scan_info.msg.scan_parameters["exp_time"] = 1
+        # camera.scan_info.msg.num_points = 10
+        # camera.scan_info.msg.scan_parameters["frames_per_trigger"] = 1
+        # camera.scan_info.msg.scan_parameters["exp_time"] = 1
         camera.stage()
         assert mock_h5_writer.on_stage.call_count == 0
         camera.unstage()