diff --git a/test/built-ins/TypedArray/prototype/reduce/resizable-buffer-grow-mid-iteration.js b/test/built-ins/TypedArray/prototype/reduce/resizable-buffer-grow-mid-iteration.js
index 46b7beeb2b8..d5aec2c57ad 100644
--- a/test/built-ins/TypedArray/prototype/reduce/resizable-buffer-grow-mid-iteration.js
+++ b/test/built-ins/TypedArray/prototype/reduce/resizable-buffer-grow-mid-iteration.js
@@ -19,7 +19,7 @@ let resizeTo;
 // resizeTo. To be called by a method of the view being collected.
 // Note that rab, values, resizeAfter, and resizeTo may need to be reset
 // before calling this.
-function ResizeMidIteration(n) {
+function ResizeMidIteration(acc, n) {
   // Returns true by default.
   return CollectValuesAndResize(n, values, rab, resizeAfter, resizeTo);
 }
diff --git a/test/built-ins/TypedArray/prototype/reduce/resizable-buffer-shrink-mid-iteration.js b/test/built-ins/TypedArray/prototype/reduce/resizable-buffer-shrink-mid-iteration.js
index e9de100daaf..0838d691b7c 100644
--- a/test/built-ins/TypedArray/prototype/reduce/resizable-buffer-shrink-mid-iteration.js
+++ b/test/built-ins/TypedArray/prototype/reduce/resizable-buffer-shrink-mid-iteration.js
@@ -19,7 +19,7 @@ let resizeTo;
 // resizeTo. To be called by a method of the view being collected.
 // Note that rab, values, resizeAfter, and resizeTo may need to be reset
 // before calling this.
-function ResizeMidIteration(n) {
+function ResizeMidIteration(acc, n) {
   return CollectValuesAndResize(n, values, rab, resizeAfter, resizeTo);
 }