diff --git a/yjit/src/asm/arm64/arg/bitmask_imm.rs b/yjit/src/asm/arm64/arg/bitmask_imm.rs
index ff9b2c8a2d..6b71a73d2c 100644
--- a/yjit/src/asm/arm64/arg/bitmask_imm.rs
+++ b/yjit/src/asm/arm64/arg/bitmask_imm.rs
@@ -106,7 +106,7 @@ mod tests {
 
     #[test]
     fn test_failures() {
-        vec![5, 9, 10, 11, 13, 17, 18, 19].iter().for_each(|&imm| {
+        [5, 9, 10, 11, 13, 17, 18, 19].iter().for_each(|&imm| {
             assert!(BitmaskImmediate::try_from(imm).is_err());
         });
     }