diff --git a/lightsim2grid/tests/test_NewtonPF.py b/lightsim2grid/tests/test_NewtonPF.py
index bafa904..1347c05 100644
--- a/lightsim2grid/tests/test_NewtonPF.py
+++ b/lightsim2grid/tests/test_NewtonPF.py
@@ -9,9 +9,8 @@
 import os
 import unittest
 import numpy as np
-import pdb
 import zipfile
-from lightsim2grid.newtonpf import newtonpf_old as newtonpf
+from lightsim2grid.pandapower_compat import newtonpf_old as newtonpf
 from scipy import sparse