diff --git a/nac3standalone/demo/src/lists.py b/nac3standalone/demo/src/lists.py
index ca153a8dc..f05701bf8 100644
--- a/nac3standalone/demo/src/lists.py
+++ b/nac3standalone/demo/src/lists.py
@@ -229,7 +229,7 @@ def list_slice_assignment():
     bl5[3:-5] = []
     output_int32_list([int32(b) for b in bl5])
     bl6 = bl[:]
-    bl6[3:-5] = [True, False, False]
+    bl6[3:-5] = [True, False]
     output_int32_list([int32(b) for b in bl6])
     bl7 = bl[:]
     bl7[:-2] = [False]