diff --git a/crates/cli/tests/reference/string-arg.js b/crates/cli/tests/reference/string-arg.js
index 8c006997f9d9..7ce1a4db2f3d 100644
--- a/crates/cli/tests/reference/string-arg.js
+++ b/crates/cli/tests/reference/string-arg.js
@@ -75,6 +75,7 @@ function passStringToWasm0(arg, malloc, realloc) {
         const ret = encodeString(arg, view);
 
         offset += ret.written;
+        ptr = realloc(ptr, len, offset, 1) >>> 0;
     }
 
     WASM_VECTOR_LEN = offset;