diff --git a/pydatview/plugins/tests/test_standardizeUnits.py b/pydatview/plugins/tests/test_standardizeUnits.py
index bfa9540..7c44785 100644
--- a/pydatview/plugins/tests/test_standardizeUnits.py
+++ b/pydatview/plugins/tests/test_standardizeUnits.py
@@ -18,7 +18,7 @@ def test_change_units(self):
         np.testing.assert_almost_equal(tab.data.values[:,1],[1])
         np.testing.assert_almost_equal(tab.data.values[:,2],[2])
         np.testing.assert_almost_equal(tab.data.values[:,3],[10])
-        np.testing.assert_equal(tab.columns, ['Index','om [rpm]', 'F [kN]', 'angle_[deg]'])
+        np.testing.assert_equal(list(tab.columns), ['Index','om [rpm]', 'F [kN]', 'angle_[deg]'])
 
 
 if __name__ == '__main__':