diff --git a/src/qibolab/instruments/qblox/cluster_qrm_rf.py b/src/qibolab/instruments/qblox/cluster_qrm_rf.py
index 1fac3162b8..73c2ea9f37 100644
--- a/src/qibolab/instruments/qblox/cluster_qrm_rf.py
+++ b/src/qibolab/instruments/qblox/cluster_qrm_rf.py
@@ -623,7 +623,7 @@ def process_pulse_sequence(
                 # Add scope_acquisition to default sequencer
                 if (
                     sequencer.number == self.DEFAULT_SEQUENCERS[port]
-                    and not pulse == None
+                    and pulse is not None
                 ):
                     sequencer.acquisitions["scope_acquisition"] = {
                         "num_bins": 1,