diff --git a/script/test/20220201/MultiRegionScan.py b/script/test/20220201/MultiRegionScan.py
index 0908d0eb..ad03d9f0 100644
--- a/script/test/20220201/MultiRegionScan.py
+++ b/script/test/20220201/MultiRegionScan.py
@@ -253,7 +253,7 @@ class SimpleDeviceReader(ReadonlyRegisterBase):
     """
     def read(self):
         print("simple device read")
-        v = source.read()
+        v = SampleCurrent.read()
         print(v)
         return v