diff --git a/pyrpl/test/test_registers.py b/pyrpl/test/test_registers.py
index 4a02d9c6c..2e3a36caa 100644
--- a/pyrpl/test/test_registers.py
+++ b/pyrpl/test/test_registers.py
@@ -88,7 +88,7 @@ def register_validation(self, module, modulekey, reg, regkey):
                           'voltage2',
                           'firstpoint',
                           'lastpoint'
-                          ]:
+                          ] or modulekey == 'sampler':
                 return
             # write something different and confirm change
             if value == 0: