diff --git a/src/spikeinterface/core/testing.py b/src/spikeinterface/core/testing.py
index 3f311f1bdd..2dbfbc604e 100644
--- a/src/spikeinterface/core/testing.py
+++ b/src/spikeinterface/core/testing.py
@@ -112,30 +112,33 @@ def check_sortings_equal(
 
     max_spike_index = SX1.to_spike_vector()["sample_index"].max()
 
-    # TODO for later  use to_spike_vector() to do this without looping
-    for segment_idx in range(SX1.get_num_segments()):
-        # get_unit_ids
-        ids1 = np.sort(np.array(SX1.get_unit_ids()))
-        ids2 = np.sort(np.array(SX2.get_unit_ids()))
-        assert_array_equal(ids1, ids2)
-        for id in ids1:
-            train1 = np.sort(SX1.get_unit_spike_train(id, segment_index=segment_idx))
-            train2 = np.sort(SX2.get_unit_spike_train(id, segment_index=segment_idx))
-            assert np.array_equal(train1, train2)
-            train1 = np.sort(SX1.get_unit_spike_train(id, segment_index=segment_idx, start_frame=30))
-            train2 = np.sort(SX2.get_unit_spike_train(id, segment_index=segment_idx, start_frame=30))
-            assert np.array_equal(train1, train2)
-            # test that slicing works correctly
-            train1 = np.sort(SX1.get_unit_spike_train(id, segment_index=segment_idx, end_frame=max_spike_index - 30))
-            train2 = np.sort(SX2.get_unit_spike_train(id, segment_index=segment_idx, end_frame=max_spike_index - 30))
-            assert np.array_equal(train1, train2)
-            train1 = np.sort(
-                SX1.get_unit_spike_train(id, segment_index=segment_idx, start_frame=30, end_frame=max_spike_index - 30)
-            )
-            train2 = np.sort(
-                SX2.get_unit_spike_train(id, segment_index=segment_idx, start_frame=30, end_frame=max_spike_index - 30)
-            )
-            assert np.array_equal(train1, train2)
+    def _sorted_spike_vector(SX):
+        spikes = SX.to_spike_vector()
+        order = np.lexsort((spikes["sample_index"], spikes["unit_index"], spikes["segment_index"]))
+        return spikes[order]
+
+    def _slice_spikes(spikes, start_frame=None, end_frame=None):
+        mask = np.ones(spikes.size, dtype=bool)
+        if start_frame is not None:
+            mask &= spikes["sample_index"] >= start_frame
+        if end_frame is not None:
+            mask &= spikes["sample_index"] <= end_frame
+        return spikes[mask]
+
+    s1 = _sorted_spike_vector(SX1)
+    s2 = _sorted_spike_vector(SX2)
+    assert_array_equal(s1, s2)
+
+    for start_frame, end_frame in [
+        (None, None),
+        (30, None),
+        (None, max_spike_index - 30),
+        (30, max_spike_index - 30),
+    ]:
+
+        slice1 = _slice_spikes(s1, start_frame, end_frame)
+        slice2 = _slice_spikes(s2, start_frame, end_frame)
+        assert np.array_equal(slice1, slice2)
 
     if check_annotations:
         check_extractor_annotations_equal(SX1, SX2)