diff --git a/eitprocessing/filters/__init__.py b/eitprocessing/filters/__init__.py
index 92e9c321e..ce403f79c 100644
--- a/eitprocessing/filters/__init__.py
+++ b/eitprocessing/filters/__init__.py
@@ -3,8 +3,8 @@
 
 import numpy as np
 
+from eitprocessing.datahandling.continuousdata import ContinuousData
 from eitprocessing.datahandling.eitdata import EITData
-from tests.test_breath_detection import ContinuousData
 
 T = TypeVar("T", bound=np.ndarray | ContinuousData | EITData)