diff --git a/prototyping/Tests/Interpreter/return_nil/out.txt b/prototyping/Tests/Interpreter/return_nil/out.txt
index a4ab58d1..607602cf 100644
--- a/prototyping/Tests/Interpreter/return_nil/out.txt
+++ b/prototyping/Tests/Interpreter/return_nil/out.txt
@@ -1 +1 @@
-not nil
+nil