diff --git a/pulse_lib/tests/mock_m3102a.py b/pulse_lib/tests/mock_m3102a.py
index c313f7760e7a576dec00135fc8a458e6d135cbf1..f4cff0356346bd27560146e5b629c5ed26d5c4bb 100644
--- a/pulse_lib/tests/mock_m3102a.py
+++ b/pulse_lib/tests/mock_m3102a.py
@@ -24,6 +24,9 @@ class MockM3102A(Instrument):
     def set_operating_mode(self, value):
         pass
 
+    def set_acquisition_mode(self, value):
+        pass
+
     def set_active_channels(self, channel_list):
         self.measure._active_channels = set(channel_list)