diff --git a/scos_actions/actions/acquire_sea_data_product.py b/scos_actions/actions/acquire_sea_data_product.py
index 69d464fe..3409699a 100644
--- a/scos_actions/actions/acquire_sea_data_product.py
+++ b/scos_actions/actions/acquire_sea_data_product.py
@@ -34,6 +34,9 @@
 from environs import Env
 from its_preselector import __version__ as PRESELECTOR_API_VERSION
 from scipy.signal import sos2tf, sosfilt
+
+from scos_actions import __version__ as SCOS_ACTIONS_VERSION
+from scos_actions import utils
 from scos_actions.actions.interfaces.action import Action
 from scos_actions.hardware.sensor import Sensor
 from scos_actions.hardware.utils import (
@@ -73,9 +76,6 @@
 from scos_actions.signals import measurement_action_completed, trigger_api_restart
 from scos_actions.utils import convert_datetime_to_millisecond_iso_format, get_days_up
 
-from scos_actions import __version__ as SCOS_ACTIONS_VERSION
-from scos_actions import utils
-
 env = Env()
 logger = logging.getLogger(__name__)
 
@@ -766,7 +766,7 @@ def capture_diagnostics(
         except:
             logger.warning("Failed to get SCOS start time")
         try:  # SCOS uptime
-            cpu_diag["software_uptime"] = get_days_up()
+            cpu_diag["software_uptime"] = get_days_up(self.sensor.start_time)
         except:
             logger.warning("Failed to get SCOS uptime")
         try:  # SSD SMART data
diff --git a/scos_actions/discover/__init__.py b/scos_actions/discover/__init__.py
index f02962c3..84ba8e6e 100644
--- a/scos_actions/discover/__init__.py
+++ b/scos_actions/discover/__init__.py
@@ -3,15 +3,8 @@
 from scos_actions.actions.monitor_sigan import MonitorSignalAnalyzer
 from scos_actions.actions.sync_gps import SyncGps
 from scos_actions.discover.yaml import load_from_yaml
-from scos_actions.hardware.mocks.mock_gps import MockGPS
-from scos_actions.hardware.mocks.mock_sigan import MockSignalAnalyzer
-from scos_actions.settings import ACTION_DEFINITIONS_DIR, MOCK_SIGAN
-from scos_actions.signals import register_component_with_status
+from scos_actions.settings import ACTION_DEFINITIONS_DIR
 
-mock_sigan = MockSignalAnalyzer(randomize_values=True)
-mock_gps = MockGPS()
-if MOCK_SIGAN:
-    register_component_with_status.send(mock_sigan.__class__, component=mock_sigan)
 actions = {"logger": Logger()}
 test_actions = {
     "test_sync_gps": SyncGps(parameters={"name": "test_sync_gps"}),
diff --git a/scos_actions/hardware/sensor.py b/scos_actions/hardware/sensor.py
index 36fe0ca6..c5adb9bb 100644
--- a/scos_actions/hardware/sensor.py
+++ b/scos_actions/hardware/sensor.py
@@ -1,6 +1,6 @@
 import hashlib
 import json
-from datetime import datetime
+import datetime
 from typing import Dict
 
 from its_preselector.preselector import Preselector
@@ -28,7 +28,7 @@ def __init__(
         self._switches = switches
         self._location = location
         self.capabilities = capabilities
-        self.start_time = datetime.datetime.utcnow()
+        self_start_time = datetime.datetime.utcnow()
 
     @property
     def signal_analyzer(self) -> SignalAnalyzerInterface:
@@ -103,4 +103,4 @@ def has_configurable_preselector(self) -> bool:
 
     @property
     def start_time(self):
-        return self.start_time
+        return self._start_time
diff --git a/scos_actions/utils.py b/scos_actions/utils.py
index 0fc5a73e..e70a4324 100644
--- a/scos_actions/utils.py
+++ b/scos_actions/utils.py
@@ -5,8 +5,6 @@
 
 from dateutil import parser
 
-from scos_actions.status import start_time
-
 logger = logging.getLogger(__name__)
 
 
@@ -121,7 +119,7 @@ def get_parameter(p: str, params: dict):
     return params[p]
 
 
-def get_days_up():
+def get_days_up(start_time):
     elapsed = datetime.utcnow() - start_time
     days = elapsed.days
     fractional_day = elapsed.seconds / (60 * 60 * 24)