diff --git a/crates/aiken-project/src/tests/gen_uplc.rs b/crates/aiken-project/src/tests/gen_uplc.rs
index bde85174..a77e9aca 100644
--- a/crates/aiken-project/src/tests/gen_uplc.rs
+++ b/crates/aiken-project/src/tests/gen_uplc.rs
@@ -2403,7 +2403,7 @@ fn acceptance_test_22_filter_map() {
           }
 
           test filter_map_1() {
-            filter_map([], fn(_) { Some(43) }) == []
+            filter_map([], fn(_) { Some(42) }) == []
           }
     "#;