diff --git a/compiler/test_gen/src/gen_num.rs b/compiler/test_gen/src/gen_num.rs
index 0b72191ca9..88480c6310 100644
--- a/compiler/test_gen/src/gen_num.rs
+++ b/compiler/test_gen/src/gen_num.rs
@@ -824,7 +824,7 @@ fn gen_div_checked_by_zero_dec() {
                         Err _ -> -1
                 "#
         ),
-        -1,
+        RocDec::from_str_to_i128_unsafe("-1"),
         i128
     );
 }