diff --git a/scos_actions/actions/tests/test_sync_gps.py b/scos_actions/actions/tests/test_sync_gps.py
index ed7b2691..71c3cd4c 100644
--- a/scos_actions/actions/tests/test_sync_gps.py
+++ b/scos_actions/actions/tests/test_sync_gps.py
@@ -30,8 +30,9 @@ def callback(sender, **kwargs):
 
     location_action_completed.connect(callback)
     action = test_actions["test_sync_gps"]
+    sigan = MockSignalAnalyzer()
     sensor = Sensor(
-        signal_analyzer=MockSignalAnalyzer(), capabilities={}, gps=MockGPS()
+        signal_analyzer=sigan, capabilities={}, gps=MockGPS(sigan)
     )
     if sys.platform == "linux":
         action(sensor, SYNC_GPS, 1)
diff --git a/scos_actions/discover/tests/test_yaml.py b/scos_actions/discover/tests/test_yaml.py
index 473b39dd..953f5e3f 100644
--- a/scos_actions/discover/tests/test_yaml.py
+++ b/scos_actions/discover/tests/test_yaml.py
@@ -25,7 +25,7 @@
 """
 
 sigan = MockSignalAnalyzer()
-gps = MockGPS()
+gps = MockGPS(sigan)
 
 
 def test_load_from_yaml_existing():
diff --git a/scos_actions/hardware/tests/test_sensor.py b/scos_actions/hardware/tests/test_sensor.py
index 216d626a..50b3338f 100644
--- a/scos_actions/hardware/tests/test_sensor.py
+++ b/scos_actions/hardware/tests/test_sensor.py
@@ -7,8 +7,9 @@
 
 
 def test_sensor():
+    sigan = MockSignalAnalyzer()
     sensor = Sensor(
-        signal_analyzer=MockSignalAnalyzer(), capabilities={}, gps=MockGPS()
+        signal_analyzer=sigan, capabilities={}, gps=MockGPS(sigan)
     )
     assert sensor is not None
     assert sensor.signal_analyzer is not None
@@ -23,8 +24,9 @@ def test_set_get_preselector():
 
 
 def test_set_get_gps():
-    gps = MockGPS()
-    sensor = Sensor(signal_analyzer=MockSignalAnalyzer(), capabilities={})
+    sigan = MockSignalAnalyzer()
+    gps = MockGPS(sigan)
+    sensor = Sensor(signal_analyzer=sigan, capabilities={})
     sensor.gps = gps
     assert sensor.gps == gps