diff --git a/test/1966-get-set-local-objects-no-table/build.py b/test/1966-get-set-local-objects-no-table/build.py
index b7a608b..3a908c0 100644
--- a/test/1966-get-set-local-objects-no-table/build.py
+++ b/test/1966-get-set-local-objects-no-table/build.py
@@ -17,5 +17,5 @@
 
 
 def build(ctx):
-  ctx.bash("./generate-sources --" + os.environ["BUILD_MODE"])
+  ctx.bash("./generate-sources --" + ctx.mode)
   ctx.default_build()