diff --git a/qcodes/tests/common.py b/qcodes/tests/common.py
index b39a98e8e24..adb35214738 100644
--- a/qcodes/tests/common.py
+++ b/qcodes/tests/common.py
@@ -3,6 +3,7 @@
 from time import sleep
 import cProfile
 
+from qcodes.utils.metadata import Metadatable
 
 if TYPE_CHECKING:
     from _pytest._code.code import ExceptionInfo
@@ -118,3 +119,18 @@ def error_caused_by(excinfo: 'ExceptionInfo', cause: str) -> bool:
         return cause in str(root_traceback)
 
 
+class DumyPar(Metadatable):
+
+    """Docstring for DumyPar. """
+
+    def __init__(self, name):
+        super().__init__()
+        self.name = name
+        self.full_name = name
+
+    def __str__(self):
+        return self.full_name
+
+    def set(self, value):
+        value = value * 2
+        return value
diff --git a/qcodes/tests/parameter/test_combined_par.py b/qcodes/tests/parameter/test_combined_par.py
index 005e3f34b7e..818ae7bddb3 100644
--- a/qcodes/tests/parameter/test_combined_par.py
+++ b/qcodes/tests/parameter/test_combined_par.py
@@ -10,25 +10,9 @@
 import numpy as np
 
 from qcodes.instrument.parameter import combine
-from qcodes.utils.metadata import Metadatable
-from qcodes.utils.helpers import full_class
-
-
-class DumyPar(Metadatable):
-
-    """Docstring for DumyPar. """
 
-    def __init__(self, name):
-        super().__init__()
-        self.name = name
-        self.full_name = name
-
-    def __str__(self):
-        return self.full_name
-
-    def set(self, value):
-        value = value * 2
-        return value
+from qcodes.utils.helpers import full_class
+from ..common import DumyPar
 
 
 class TestMultiPar(unittest.TestCase):
diff --git a/qcodes/tests/parameter/test_delegate_parameter.py b/qcodes/tests/parameter/test_delegate_parameter.py
index eeaa8736c98..38e738d3198 100644
--- a/qcodes/tests/parameter/test_delegate_parameter.py
+++ b/qcodes/tests/parameter/test_delegate_parameter.py
@@ -13,6 +13,7 @@
 # Disable warning that is created by using fixtures
 # pylint: disable=redefined-outer-name
 
+
 @pytest.fixture()
 def numeric_val():
     yield 1
diff --git a/qcodes/tests/test_station.py b/qcodes/tests/test_station.py
index a2cc8b5248d..c966df1563d 100644
--- a/qcodes/tests/test_station.py
+++ b/qcodes/tests/test_station.py
@@ -21,10 +21,10 @@
 from qcodes.monitor.monitor import Monitor
 from qcodes.tests.instrument_mocks import (
     DummyInstrument)
-from qcodes.tests.test_combined_par import DumyPar
 from qcodes.tests.test_config import default_config
 from qcodes.utils.helpers import NumpyJSONEncoder
 from qcodes.utils.helpers import YAML
+from .common import DumyPar
 
 
 @pytest.fixture(autouse=True)