diff --git a/NuRadioReco/detector/test/test_ef.pkl b/NuRadioReco/detector/test/test_ef.pkl
deleted file mode 100644
index fe1729ac6..000000000
Binary files a/NuRadioReco/detector/test/test_ef.pkl and /dev/null differ
diff --git a/NuRadioReco/detector/test/test_rnog_detector.py b/NuRadioReco/detector/test/test_rnog_detector.py
index 39d870e62..8fadeb922 100644
--- a/NuRadioReco/detector/test/test_rnog_detector.py
+++ b/NuRadioReco/detector/test/test_rnog_detector.py
@@ -18,9 +18,8 @@ def test_detector():
 
 
     from NuRadioReco.framework import electric_field
-    with open(f"{os.path.dirname(__file__)}/test_ef.pkl", "rb") as f:
-        ef = electric_field.ElectricField(channel_ids=[0])
-        ef.deserialize(f.read())
+    ef = electric_field.ElectricField(channel_ids=[0])
+    ef.set_frequency_spectrum(np.ones(1025, dtype=complex), sampling_rate=2.4)
 
     ef *= response