diff --git a/tests/ffi_2/function_callbacks_very_many_test copy.dart b/tests/ffi_2/function_callbacks_very_many_test copy.dart
deleted file mode 100644
index d177728..0000000
--- a/tests/ffi_2/function_callbacks_very_many_test copy.dart
+++ /dev/null
@@ -1,297 +0,0 @@
-// Copyright (c) 2020, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// @dart = 2.9
-
-// Dart test program for testing dart:ffi function pointers with callbacks.
-//
-// VMOptions=--deterministic --optimization-counter-threshold=10
-// VMOptions=--enable-testing-pragmas
-// VMOptions=--enable-testing-pragmas --stacktrace-every=100
-// VMOptions=--enable-testing-pragmas --write-protect-code --no-dual-map-code
-// VMOptions=--enable-testing-pragmas --write-protect-code --no-dual-map-code --stacktrace-every=100
-// VMOptions=--use-slow-path --enable-testing-pragmas
-// VMOptions=--use-slow-path --enable-testing-pragmas --stacktrace-every=100
-// VMOptions=--use-slow-path --enable-testing-pragmas --write-protect-code --no-dual-map-code
-// VMOptions=--use-slow-path --enable-testing-pragmas --write-protect-code --no-dual-map-code --stacktrace-every=100
-// SharedObjects=ffi_test_functions
-
-import 'dart:ffi';
-
-import 'callback_tests_utils.dart';
-
-final testcases = [
-  CallbackTest("SumVeryManySmallInts",
-      Pointer.fromFunction<NativeVeryManyIntsOp>(sumVeryManySmallInts, 0)),
-  CallbackTest(
-      "SumVeryManyFloatsDoubles",
-      Pointer.fromFunction<NativeVeryManyFloatsDoublesOp>(
-          sumVeryManyDoubles, 0.0)),
-];
-
-void main() {
-  for (int i = 0; i < 100; ++i) {
-    testcases.forEach((t) => t.run());
-  }
-}
-
-int sumVeryManySmallInts(
-    int _1,
-    int _2,
-    int _3,
-    int _4,
-    int _5,
-    int _6,
-    int _7,
-    int _8,
-    int _9,
-    int _10,
-    int _11,
-    int _12,
-    int _13,
-    int _14,
-    int _15,
-    int _16,
-    int _17,
-    int _18,
-    int _19,
-    int _20,
-    int _21,
-    int _22,
-    int _23,
-    int _24,
-    int _25,
-    int _26,
-    int _27,
-    int _28,
-    int _29,
-    int _30,
-    int _31,
-    int _32,
-    int _33,
-    int _34,
-    int _35,
-    int _36,
-    int _37,
-    int _38,
-    int _39,
-    int _40) {
-  print("sumVeryManySmallInts(" +
-      "$_1, $_2, $_3, $_4, $_5, $_6, $_7, $_8, $_9, $_10, " +
-      "$_11, $_12, $_13, $_14, $_15, $_16, $_17, $_18, $_19, $_20, " +
-      "$_21, $_22, $_23, $_24, $_25, $_26, $_27, $_28, $_29, $_30, " +
-      "$_31, $_32, $_33, $_34, $_35, $_36, $_37, $_38, $_39, $_40)");
-  return _1 +
-      _2 +
-      _3 +
-      _4 +
-      _5 +
-      _6 +
-      _7 +
-      _8 +
-      _9 +
-      _10 +
-      _11 +
-      _12 +
-      _13 +
-      _14 +
-      _15 +
-      _16 +
-      _17 +
-      _18 +
-      _19 +
-      _20 +
-      _21 +
-      _22 +
-      _23 +
-      _24 +
-      _25 +
-      _26 +
-      _27 +
-      _28 +
-      _29 +
-      _30 +
-      _31 +
-      _32 +
-      _33 +
-      _34 +
-      _35 +
-      _36 +
-      _37 +
-      _38 +
-      _39 +
-      _40;
-}
-
-double sumVeryManyDoubles(
-    double _1,
-    double _2,
-    double _3,
-    double _4,
-    double _5,
-    double _6,
-    double _7,
-    double _8,
-    double _9,
-    double _10,
-    double _11,
-    double _12,
-    double _13,
-    double _14,
-    double _15,
-    double _16,
-    double _17,
-    double _18,
-    double _19,
-    double _20,
-    double _21,
-    double _22,
-    double _23,
-    double _24,
-    double _25,
-    double _26,
-    double _27,
-    double _28,
-    double _29,
-    double _30,
-    double _31,
-    double _32,
-    double _33,
-    double _34,
-    double _35,
-    double _36,
-    double _37,
-    double _38,
-    double _39,
-    double _40) {
-  print("sumVeryManyDoubles(" +
-      "$_1, $_2, $_3, $_4, $_5, $_6, $_7, $_8, $_9, $_10, " +
-      "$_11, $_12, $_13, $_14, $_15, $_16, $_17, $_18, $_19, $_20, " +
-      "$_21, $_22, $_23, $_24, $_25, $_26, $_27, $_28, $_29, $_30, " +
-      "$_31, $_32, $_33, $_34, $_35, $_36, $_37, $_38, $_39, $_40)");
-  return _1 +
-      _2 +
-      _3 +
-      _4 +
-      _5 +
-      _6 +
-      _7 +
-      _8 +
-      _9 +
-      _10 +
-      _11 +
-      _12 +
-      _13 +
-      _14 +
-      _15 +
-      _16 +
-      _17 +
-      _18 +
-      _19 +
-      _20 +
-      _21 +
-      _22 +
-      _23 +
-      _24 +
-      _25 +
-      _26 +
-      _27 +
-      _28 +
-      _29 +
-      _30 +
-      _31 +
-      _32 +
-      _33 +
-      _34 +
-      _35 +
-      _36 +
-      _37 +
-      _38 +
-      _39 +
-      _40;
-}
-
-typedef NativeVeryManyIntsOp = Int16 Function(
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16,
-    Int8,
-    Int16);
-
-typedef NativeVeryManyFloatsDoublesOp = Double Function(
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double,
-    Float,
-    Double);
diff --git a/tools/VERSION b/tools/VERSION
index 6e18a17..4be31de 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -27,5 +27,5 @@
 MAJOR 2
 MINOR 14
 PATCH 0
-PRERELEASE 80
+PRERELEASE 81
 PRERELEASE_PATCH 0
\ No newline at end of file