diff --git a/lib/6to5/file.js b/lib/6to5/file.js
index 92258afae3..6c4b1586e5 100644
--- a/lib/6to5/file.js
+++ b/lib/6to5/file.js
@@ -73,6 +73,8 @@ File.normaliseOptions = function (opts) {
 File.prototype.toArray = function (node) {
   if (t.isArrayExpression(node)) {
     return node;
+  } else if (t.isIdentifier(node) && node.name === "arguments") {
+    return t.callExpression(t.memberExpression(this.addDeclaration("slice"), t.identifier("call")), [node]);
   } else {
     return t.callExpression(this.addDeclaration("to-array"), [node]);
   }
diff --git a/test/fixtures/transformation/classes/accessing-super-class/expected.js b/test/fixtures/transformation/classes/accessing-super-class/expected.js
index 37a2a13d6f..d49fffb74e 100644
--- a/test/fixtures/transformation/classes/accessing-super-class/expected.js
+++ b/test/fixtures/transformation/classes/accessing-super-class/expected.js
@@ -1,9 +1,6 @@
 "use strict";
 
-var _toArray = function (arr) {
-  return Array.isArray(arr) ? arr : Array.from(arr);
-};
-
+var _slice = Array.prototype.slice;
 var _classProps = function (child, staticProps, instanceProps) {
   if (staticProps) Object.defineProperties(child, staticProps);
   if (instanceProps) Object.defineProperties(child.prototype, instanceProps);
@@ -28,11 +25,11 @@ var Test = (function (Foo) {
     Foo.prototype.test.call(this);
     foob(Foo);
 
-    Foo.call.apply(Foo, [this].concat(_toArray(arguments)));
-    Foo.call.apply(Foo, [this, "test"].concat(_toArray(arguments)));
+    Foo.call.apply(Foo, [this].concat(_slice.call(arguments)));
+    Foo.call.apply(Foo, [this, "test"].concat(_slice.call(arguments)));
 
-    Foo.prototype.test.call.apply(Foo.prototype, [this].concat(_toArray(arguments)));
-    Foo.prototype.test.call.apply(Foo.prototype, [this, "test"].concat(_toArray(arguments)));
+    Foo.prototype.test.call.apply(Foo.prototype, [this].concat(_slice.call(arguments)));
+    Foo.prototype.test.call.apply(Foo.prototype, [this, "test"].concat(_slice.call(arguments)));
   };
 
   _extends(Test, Foo);
@@ -42,8 +39,8 @@ var Test = (function (Foo) {
       writable: true,
       value: function () {
         Foo.foo.call(this);
-        Foo.foo.call.apply(Foo.foo, [this].concat(_toArray(arguments)));
-        Foo.foo.call.apply(Foo.foo, [this, "test"].concat(_toArray(arguments)));
+        Foo.foo.call.apply(Foo.foo, [this].concat(_slice.call(arguments)));
+        Foo.foo.call.apply(Foo.foo, [this, "test"].concat(_slice.call(arguments)));
       }
     }
   }, {
@@ -51,8 +48,8 @@ var Test = (function (Foo) {
       writable: true,
       value: function () {
         Foo.prototype.test.call(this);
-        Foo.prototype.test.call.apply(Foo.prototype.test, [this].concat(_toArray(arguments)));
-        Foo.prototype.test.call.apply(Foo.prototype.test, [this, "test"].concat(_toArray(arguments)));
+        Foo.prototype.test.call.apply(Foo.prototype.test, [this].concat(_slice.call(arguments)));
+        Foo.prototype.test.call.apply(Foo.prototype.test, [this, "test"].concat(_slice.call(arguments)));
       }
     }
   });
diff --git a/test/fixtures/transformation/spread/arguments/expected.js b/test/fixtures/transformation/spread/arguments/expected.js
index ac2f6ab06d..1ba8c3aeb2 100644
--- a/test/fixtures/transformation/spread/arguments/expected.js
+++ b/test/fixtures/transformation/spread/arguments/expected.js
@@ -1,11 +1,8 @@
 "use strict";
 
-var _toArray = function (arr) {
-  return Array.isArray(arr) ? arr : Array.from(arr);
-};
-
+var _slice = Array.prototype.slice;
 function foo() {
-  return bar.apply(null, ["test"].concat(_toArray(arguments)));
+  return bar.apply(null, ["test"].concat(_slice.call(arguments)));
 }
 
 function bar(one, two, three) {