diff --git a/src/spikeinterface/preprocessing/tests/test_clip.py b/src/spikeinterface/preprocessing/tests/test_clip.py
index 724ba2c963..c18c7d37af 100644
--- a/src/spikeinterface/preprocessing/tests/test_clip.py
+++ b/src/spikeinterface/preprocessing/tests/test_clip.py
@@ -14,12 +14,12 @@ def test_clip():
     rec1 = clip(rec, a_min=-1.5)
     rec1.save(verbose=False)
 
-    traces0 = rec0.get_traces(segment_index=0, channel_ids=[1])
+    traces0 = rec0.get_traces(segment_index=0, channel_ids=["1"])
     assert traces0.shape[1] == 1
 
     assert np.all(-2 <= traces0[0] <= 3)
 
-    traces1 = rec1.get_traces(segment_index=0, channel_ids=[0, 1])
+    traces1 = rec1.get_traces(segment_index=0, channel_ids=["0", "1"])
     assert traces1.shape[1] == 2
 
     assert np.all(-1.5 <= traces1[1])
@@ -34,11 +34,11 @@ def test_blank_staturation():
     rec1 = blank_staturation(rec, quantile_threshold=0.01, direction="both", chunk_size=10000)
     rec1.save(verbose=False)
 
-    traces0 = rec0.get_traces(segment_index=0, channel_ids=[1])
+    traces0 = rec0.get_traces(segment_index=0, channel_ids=["1"])
     assert traces0.shape[1] == 1
     assert np.all(traces0 < 3.0)
 
-    traces1 = rec1.get_traces(segment_index=0, channel_ids=[0])
+    traces1 = rec1.get_traces(segment_index=0, channel_ids=["0"])
     assert traces1.shape[1] == 1
     # use a smaller value to be sure
     a_min = rec1._recording_segments[0].a_min
diff --git a/src/spikeinterface/preprocessing/tests/test_interpolate_bad_channels.py b/src/spikeinterface/preprocessing/tests/test_interpolate_bad_channels.py
index 1189f04f7d..06bde4e3d1 100644
--- a/src/spikeinterface/preprocessing/tests/test_interpolate_bad_channels.py
+++ b/src/spikeinterface/preprocessing/tests/test_interpolate_bad_channels.py
@@ -163,7 +163,9 @@ def test_output_values():
     expected_weights = np.r_[np.tile(np.exp(-2), 3), np.exp(-4)]
     expected_weights /= np.sum(expected_weights)
 
-    si_interpolated_recording = spre.interpolate_bad_channels(recording, bad_channel_indexes, sigma_um=1, p=1)
+    si_interpolated_recording = spre.interpolate_bad_channels(
+        recording, bad_channel_ids=bad_channel_ids, sigma_um=1, p=1
+    )
     si_interpolated = si_interpolated_recording.get_traces()
 
     expected_ts = si_interpolated[:, 1:] @ expected_weights
diff --git a/src/spikeinterface/preprocessing/tests/test_normalize_scale.py b/src/spikeinterface/preprocessing/tests/test_normalize_scale.py
index 576b570832..151752e0e6 100644
--- a/src/spikeinterface/preprocessing/tests/test_normalize_scale.py
+++ b/src/spikeinterface/preprocessing/tests/test_normalize_scale.py
@@ -15,7 +15,7 @@ def test_normalize_by_quantile():
     rec2 = normalize_by_quantile(rec, mode="by_channel")
     rec2.save(verbose=False)
 
-    traces = rec2.get_traces(segment_index=0, channel_ids=[1])
+    traces = rec2.get_traces(segment_index=0, channel_ids=["1"])
     assert traces.shape[1] == 1
 
     rec2 = normalize_by_quantile(rec, mode="pool_channel")
diff --git a/src/spikeinterface/preprocessing/tests/test_rectify.py b/src/spikeinterface/preprocessing/tests/test_rectify.py
index b8bb31015e..a2a06e7a1f 100644
--- a/src/spikeinterface/preprocessing/tests/test_rectify.py
+++ b/src/spikeinterface/preprocessing/tests/test_rectify.py
@@ -15,7 +15,7 @@ def test_rectify():
     rec2 = rectify(rec)
     rec2.save(verbose=False)
 
-    traces = rec2.get_traces(segment_index=0, channel_ids=[1])
+    traces = rec2.get_traces(segment_index=0, channel_ids=["1"])
     assert traces.shape[1] == 1
 
     # import matplotlib.pyplot as plt