diff --git a/src/spikeinterface/qualitymetrics/misc_metrics.py b/src/spikeinterface/qualitymetrics/misc_metrics.py
index c742141d5d..f449b3c31b 100644
--- a/src/spikeinterface/qualitymetrics/misc_metrics.py
+++ b/src/spikeinterface/qualitymetrics/misc_metrics.py
@@ -523,7 +523,7 @@ def compute_synchrony_metrics(waveform_extractor, synchrony_sizes=(2, 4, 8), uni
     Based on concepts described in [Gruen]_
     This code was adapted from `Elephant - Electrophysiology Analysis Toolkit <https://github.com/NeuralEnsemble/elephant/blob/master/elephant/spike_train_synchrony.py#L245>`_
     """
-    assert np.all([s > 1 for s in synchrony_sizes]), "Synchrony sizes must be greater than 1"
+    assert min(synchrony_sizes) > 1, "Synchrony sizes must be greater than 1"
     spike_counts = waveform_extractor.sorting.count_num_spikes_per_unit()
     sorting = waveform_extractor.sorting
     spikes = sorting.to_spike_vector(concatenated=False)