diff --git a/lib/6to5/transformation/templates/to-consumable-array.js b/lib/6to5/transformation/templates/to-consumable-array.js
index eae69c01a8..9e042dadf1 100644
--- a/lib/6to5/transformation/templates/to-consumable-array.js
+++ b/lib/6to5/transformation/templates/to-consumable-array.js
@@ -1,6 +1,6 @@
 (function (arr) {
   if (Array.isArray(arr)) {
-    for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2.push(arr[i]);
+    for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];
     return arr2;
   } else {
     return Array.from(arr);
diff --git a/test/fixtures/transformation/es6-spread/array-literal-first/expected.js b/test/fixtures/transformation/es6-spread/array-literal-first/expected.js
index c2af6d1ce9..4fe049cf69 100644
--- a/test/fixtures/transformation/es6-spread/array-literal-first/expected.js
+++ b/test/fixtures/transformation/es6-spread/array-literal-first/expected.js
@@ -1,5 +1,5 @@
 "use strict";
 
-var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2.push(arr[i]); return arr2; } else { return Array.from(arr); } };
+var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } };
 
 var lyrics = [].concat(_toConsumableArray(parts), ["head", "and", "toes"]);
diff --git a/test/fixtures/transformation/es6-spread/array-literal-middle/expected.js b/test/fixtures/transformation/es6-spread/array-literal-middle/expected.js
index c78310e623..a4a19d29d0 100644
--- a/test/fixtures/transformation/es6-spread/array-literal-middle/expected.js
+++ b/test/fixtures/transformation/es6-spread/array-literal-middle/expected.js
@@ -1,5 +1,5 @@
 "use strict";
 
-var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2.push(arr[i]); return arr2; } else { return Array.from(arr); } };
+var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } };
 
 var a = [b].concat(_toConsumableArray(c), [d]);
diff --git a/test/fixtures/transformation/es6-spread/array-literal-multiple/expected.js b/test/fixtures/transformation/es6-spread/array-literal-multiple/expected.js
index 73adb9bf8f..8190d877aa 100644
--- a/test/fixtures/transformation/es6-spread/array-literal-multiple/expected.js
+++ b/test/fixtures/transformation/es6-spread/array-literal-multiple/expected.js
@@ -1,5 +1,5 @@
 "use strict";
 
-var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2.push(arr[i]); return arr2; } else { return Array.from(arr); } };
+var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } };
 
 var a = [b].concat(_toConsumableArray(c), [d, e], _toConsumableArray(f));
diff --git a/test/fixtures/transformation/es6-spread/array-literals/expected.js b/test/fixtures/transformation/es6-spread/array-literals/expected.js
index b851c6d184..5881ce581e 100644
--- a/test/fixtures/transformation/es6-spread/array-literals/expected.js
+++ b/test/fixtures/transformation/es6-spread/array-literals/expected.js
@@ -1,5 +1,5 @@
 "use strict";
 
-var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2.push(arr[i]); return arr2; } else { return Array.from(arr); } };
+var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } };
 
 var lyrics = ["head", "and", "toes"].concat(_toConsumableArray(parts));
diff --git a/test/fixtures/transformation/es6-spread/contexted-computed-method-call-multiple-args/expected.js b/test/fixtures/transformation/es6-spread/contexted-computed-method-call-multiple-args/expected.js
index 3514133686..1be56b7551 100644
--- a/test/fixtures/transformation/es6-spread/contexted-computed-method-call-multiple-args/expected.js
+++ b/test/fixtures/transformation/es6-spread/contexted-computed-method-call-multiple-args/expected.js
@@ -1,6 +1,6 @@
 "use strict";
 
 var _obj;
-var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2.push(arr[i]); return arr2; } else { return Array.from(arr); } };
+var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } };
 
 (_obj = obj)[method].apply(_obj, [foo, bar].concat(_toConsumableArray(args)));
diff --git a/test/fixtures/transformation/es6-spread/contexted-computed-method-call-single-arg/expected.js b/test/fixtures/transformation/es6-spread/contexted-computed-method-call-single-arg/expected.js
index 1f6ba65c5b..1ec66fdeab 100644
--- a/test/fixtures/transformation/es6-spread/contexted-computed-method-call-single-arg/expected.js
+++ b/test/fixtures/transformation/es6-spread/contexted-computed-method-call-single-arg/expected.js
@@ -1,6 +1,6 @@
 "use strict";
 
 var _obj;
-var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2.push(arr[i]); return arr2; } else { return Array.from(arr); } };
+var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } };
 
 (_obj = obj)[method].apply(_obj, _toConsumableArray(args));
diff --git a/test/fixtures/transformation/es6-spread/contexted-method-call-multiple-args/expected.js b/test/fixtures/transformation/es6-spread/contexted-method-call-multiple-args/expected.js
index 37f418e90d..a45e8ae7d5 100644
--- a/test/fixtures/transformation/es6-spread/contexted-method-call-multiple-args/expected.js
+++ b/test/fixtures/transformation/es6-spread/contexted-method-call-multiple-args/expected.js
@@ -1,7 +1,7 @@
 "use strict";
 
 var _foob, _foob$test;
-var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2.push(arr[i]); return arr2; } else { return Array.from(arr); } };
+var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } };
 
 (_foob = foob).add.apply(_foob, [foo, bar].concat(_toConsumableArray(numbers)));
 (_foob$test = foob.test).add.apply(_foob$test, [foo, bar].concat(_toConsumableArray(numbers)));
diff --git a/test/fixtures/transformation/es6-spread/contexted-method-call-single-arg/expected.js b/test/fixtures/transformation/es6-spread/contexted-method-call-single-arg/expected.js
index f810925ebb..0a0755cc0d 100644
--- a/test/fixtures/transformation/es6-spread/contexted-method-call-single-arg/expected.js
+++ b/test/fixtures/transformation/es6-spread/contexted-method-call-single-arg/expected.js
@@ -1,7 +1,7 @@
 "use strict";
 
 var _foob, _foob$test;
-var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2.push(arr[i]); return arr2; } else { return Array.from(arr); } };
+var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } };
 
 (_foob = foob).add.apply(_foob, _toConsumableArray(numbers));
 (_foob$test = foob.test).add.apply(_foob$test, _toConsumableArray(numbers));
diff --git a/test/fixtures/transformation/es6-spread/method-call-first/expected.js b/test/fixtures/transformation/es6-spread/method-call-first/expected.js
index 238154736a..958db15bb1 100644
--- a/test/fixtures/transformation/es6-spread/method-call-first/expected.js
+++ b/test/fixtures/transformation/es6-spread/method-call-first/expected.js
@@ -1,5 +1,5 @@
 "use strict";
 
-var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2.push(arr[i]); return arr2; } else { return Array.from(arr); } };
+var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } };
 
 add.apply(undefined, _toConsumableArray(numbers).concat([foo, bar]));
diff --git a/test/fixtures/transformation/es6-spread/method-call-middle/expected.js b/test/fixtures/transformation/es6-spread/method-call-middle/expected.js
index abd4bcd7ec..3ad75de3cc 100644
--- a/test/fixtures/transformation/es6-spread/method-call-middle/expected.js
+++ b/test/fixtures/transformation/es6-spread/method-call-middle/expected.js
@@ -1,5 +1,5 @@
 "use strict";
 
-var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2.push(arr[i]); return arr2; } else { return Array.from(arr); } };
+var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } };
 
 add.apply(undefined, [foo].concat(_toConsumableArray(numbers), [bar]));
diff --git a/test/fixtures/transformation/es6-spread/method-call-multiple-args/expected.js b/test/fixtures/transformation/es6-spread/method-call-multiple-args/expected.js
index d2375bb28b..1e2cedd9c4 100644
--- a/test/fixtures/transformation/es6-spread/method-call-multiple-args/expected.js
+++ b/test/fixtures/transformation/es6-spread/method-call-multiple-args/expected.js
@@ -1,5 +1,5 @@
 "use strict";
 
-var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2.push(arr[i]); return arr2; } else { return Array.from(arr); } };
+var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } };
 
 add.apply(undefined, [foo, bar].concat(_toConsumableArray(numbers)));
diff --git a/test/fixtures/transformation/es6-spread/method-call-multiple/expected.js b/test/fixtures/transformation/es6-spread/method-call-multiple/expected.js
index 0dd77697f7..c07763c6b3 100644
--- a/test/fixtures/transformation/es6-spread/method-call-multiple/expected.js
+++ b/test/fixtures/transformation/es6-spread/method-call-multiple/expected.js
@@ -1,5 +1,5 @@
 "use strict";
 
-var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2.push(arr[i]); return arr2; } else { return Array.from(arr); } };
+var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } };
 
 add.apply(undefined, [foo].concat(_toConsumableArray(numbers), [bar, what], _toConsumableArray(test)));
diff --git a/test/fixtures/transformation/es6-spread/method-call-single-arg/expected.js b/test/fixtures/transformation/es6-spread/method-call-single-arg/expected.js
index 79c227b3d0..f697e3b8f5 100644
--- a/test/fixtures/transformation/es6-spread/method-call-single-arg/expected.js
+++ b/test/fixtures/transformation/es6-spread/method-call-single-arg/expected.js
@@ -1,5 +1,5 @@
 "use strict";
 
-var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2.push(arr[i]); return arr2; } else { return Array.from(arr); } };
+var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } };
 
 add.apply(undefined, _toConsumableArray(numbers));
diff --git a/test/fixtures/transformation/es6-spread/new-expression/expected.js b/test/fixtures/transformation/es6-spread/new-expression/expected.js
index 67492481e5..de0426cd6f 100644
--- a/test/fixtures/transformation/es6-spread/new-expression/expected.js
+++ b/test/fixtures/transformation/es6-spread/new-expression/expected.js
@@ -2,7 +2,7 @@
 
 var _applyConstructor = function (Constructor, args) { var instance = Object.create(Constructor.prototype); var result = Constructor.apply(instance, args); return result != null && (typeof result == "object" || typeof result == "function") ? result : instance; };
 
-var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2.push(arr[i]); return arr2; } else { return Array.from(arr); } };
+var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } };
 
 _applyConstructor(Numbers, _toConsumableArray(nums));
 _applyConstructor(Numbers, [1].concat(_toConsumableArray(nums)));
diff --git a/test/fixtures/transformation/es6-spread/single/expected.js b/test/fixtures/transformation/es6-spread/single/expected.js
index 91a327d74c..74a812d890 100644
--- a/test/fixtures/transformation/es6-spread/single/expected.js
+++ b/test/fixtures/transformation/es6-spread/single/expected.js
@@ -1,5 +1,5 @@
 "use strict";
 
-var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2.push(arr[i]); return arr2; } else { return Array.from(arr); } };
+var _toConsumableArray = function (arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } };
 
 [].concat(_toConsumableArray(foo));