diff --git a/test/fixtures/transformation/es6-destructuring/array-unpack-optimisation/actual.js b/test/fixtures/transformation/es6-destructuring/array-unpack-optimisation/actual.js
index 89bfb76776..51454e64c4 100644
--- a/test/fixtures/transformation/es6-destructuring/array-unpack-optimisation/actual.js
+++ b/test/fixtures/transformation/es6-destructuring/array-unpack-optimisation/actual.js
@@ -7,3 +7,4 @@ var [[a, b, ...c]] = [[1, 2, 3, 4]];
 // deopt
 var [a, b] = [1, 2, 3];
 var [[a, b]] = [[1, 2, 3]];
+var [a, b] = [a, b];
diff --git a/test/fixtures/transformation/es6-destructuring/array-unpack-optimisation/expected.js b/test/fixtures/transformation/es6-destructuring/array-unpack-optimisation/expected.js
index d1aaf9d67a..1ba95f1de6 100644
--- a/test/fixtures/transformation/es6-destructuring/array-unpack-optimisation/expected.js
+++ b/test/fixtures/transformation/es6-destructuring/array-unpack-optimisation/expected.js
@@ -19,3 +19,6 @@ var b = _ref[1];
 var _ref2 = [1, 2, 3];
 var a = _ref2[0];
 var b = _ref2[1];
+var _ref3 = [a, b];
+var a = _ref3[0];
+var b = _ref3[1];
diff --git a/test/fixtures/transformation/es6-destructuring/array/actual.js b/test/fixtures/transformation/es6-destructuring/array/actual.js
index 4163832fd0..807dbdb574 100644
--- a/test/fixtures/transformation/es6-destructuring/array/actual.js
+++ b/test/fixtures/transformation/es6-destructuring/array/actual.js
@@ -1 +1,3 @@
 var [a, [b], [c]] = ["hello", [", ", "junk"], ["world"]];
+[a, [b], [c]] = ["hello", [", ", "junk"], ["world"]];
+;
diff --git a/test/fixtures/transformation/es6-destructuring/array/expected.js b/test/fixtures/transformation/es6-destructuring/array/expected.js
index a84ffda3d5..e250f872c7 100644
--- a/test/fixtures/transformation/es6-destructuring/array/expected.js
+++ b/test/fixtures/transformation/es6-destructuring/array/expected.js
@@ -4,3 +4,9 @@ var a = "hello";
 var _ref = [", ", "junk"];
 var b = _ref[0];
 var c = "world";
+a = "hello";
+var _ref2 = [", ", "junk"];
+b = _ref2[0];
+c = "world";
+
+;
diff --git a/test/fixtures/transformation/es6-destructuring/assignment-statement/expected.js b/test/fixtures/transformation/es6-destructuring/assignment-statement/expected.js
index 8a076f9f6e..be5074dd30 100644
--- a/test/fixtures/transformation/es6-destructuring/assignment-statement/expected.js
+++ b/test/fixtures/transformation/es6-destructuring/assignment-statement/expected.js
@@ -1,10 +1,10 @@
 "use strict";
 
-var _ref = f();
+var _f = f();
 
-var _ref2 = babelHelpers.slicedToArray(_ref, 2);
+var _f2 = babelHelpers.slicedToArray(_f, 2);
 
-a = _ref2[0];
-b = _ref2[1];
+a = _f2[0];
+b = _f2[1];
 
 ;
diff --git a/test/fixtures/transformation/es6-destructuring/member-expression/expected.js b/test/fixtures/transformation/es6-destructuring/member-expression/expected.js
index 57c5ef8472..bb06a8b3a2 100644
--- a/test/fixtures/transformation/es6-destructuring/member-expression/expected.js
+++ b/test/fixtures/transformation/es6-destructuring/member-expression/expected.js
@@ -1,10 +1,4 @@
 "use strict";
 
-var _ref = [1, 2];
-
-var _ref2 = babelHelpers.slicedToArray(_ref, 2);
-
-foo.foo = _ref2[0];
-foo.bar = _ref2[1];
-
-;
+foo.foo = 1;
+foo.bar = 2;
diff --git a/test/fixtures/transformation/es6-destructuring/mixed/actual.js b/test/fixtures/transformation/es6-destructuring/mixed/actual.js
index 79ac2cb22f..750152e4d8 100644
--- a/test/fixtures/transformation/es6-destructuring/mixed/actual.js
+++ b/test/fixtures/transformation/es6-destructuring/mixed/actual.js
@@ -1 +1,2 @@
+var rect = {};
 var {topLeft: [x1, y1], bottomRight: [x2, y2] } = rect;
diff --git a/test/fixtures/transformation/es6-destructuring/mixed/expected.js b/test/fixtures/transformation/es6-destructuring/mixed/expected.js
index 8a7d6a658b..2265a6d4c3 100644
--- a/test/fixtures/transformation/es6-destructuring/mixed/expected.js
+++ b/test/fixtures/transformation/es6-destructuring/mixed/expected.js
@@ -1,5 +1,7 @@
 "use strict";
 
+var rect = {};
+
 var _rect$topLeft = babelHelpers.slicedToArray(rect.topLeft, 2);
 
 var x1 = _rect$topLeft[0];
diff --git a/test/fixtures/transformation/es6-destructuring/multiple/actual.js b/test/fixtures/transformation/es6-destructuring/multiple/actual.js
index 09249c483c..76d2562560 100644
--- a/test/fixtures/transformation/es6-destructuring/multiple/actual.js
+++ b/test/fixtures/transformation/es6-destructuring/multiple/actual.js
@@ -1,2 +1,3 @@
+var coords = [1, 2];
 var { x, y } = coords,
     foo = "bar";
diff --git a/test/fixtures/transformation/es6-destructuring/multiple/expected.js b/test/fixtures/transformation/es6-destructuring/multiple/expected.js
index c782335937..e7babadf88 100644
--- a/test/fixtures/transformation/es6-destructuring/multiple/expected.js
+++ b/test/fixtures/transformation/es6-destructuring/multiple/expected.js
@@ -1,5 +1,6 @@
 "use strict";
 
+var coords = [1, 2];
 var x = coords.x;
 var y = coords.y;
 var foo = "bar";
diff --git a/test/fixtures/transformation/es6-destructuring/object-advanced/actual.js b/test/fixtures/transformation/es6-destructuring/object-advanced/actual.js
index c4b85492cf..27a221c473 100644
--- a/test/fixtures/transformation/es6-destructuring/object-advanced/actual.js
+++ b/test/fixtures/transformation/es6-destructuring/object-advanced/actual.js
@@ -1 +1,2 @@
+var rect = {};
 var {topLeft: {x: x1, y: y1}, bottomRight: {x: x2, y: y2}} = rect;
diff --git a/test/fixtures/transformation/es6-destructuring/object-advanced/expected.js b/test/fixtures/transformation/es6-destructuring/object-advanced/expected.js
index 1048f7d0d4..9d8636356f 100644
--- a/test/fixtures/transformation/es6-destructuring/object-advanced/expected.js
+++ b/test/fixtures/transformation/es6-destructuring/object-advanced/expected.js
@@ -1,8 +1,9 @@
 "use strict";
 
+var rect = {};
 var _rect$topLeft = rect.topLeft;
 var x1 = _rect$topLeft.x;
 var y1 = _rect$topLeft.y;
 var _rect$bottomRight = rect.bottomRight;
 var x2 = _rect$bottomRight.x;
-var y2 = _rect$bottomRight.y;
\ No newline at end of file
+var y2 = _rect$bottomRight.y;
diff --git a/test/fixtures/transformation/es6-destructuring/object-basic/actual.js b/test/fixtures/transformation/es6-destructuring/object-basic/actual.js
index dae014575e..df6ae4086f 100644
--- a/test/fixtures/transformation/es6-destructuring/object-basic/actual.js
+++ b/test/fixtures/transformation/es6-destructuring/object-basic/actual.js
@@ -1 +1,2 @@
+var coords = [1, 2];
 var { x, y } = coords;
diff --git a/test/fixtures/transformation/es6-destructuring/object-basic/expected.js b/test/fixtures/transformation/es6-destructuring/object-basic/expected.js
index 97601e8b4e..9f119eee59 100644
--- a/test/fixtures/transformation/es6-destructuring/object-basic/expected.js
+++ b/test/fixtures/transformation/es6-destructuring/object-basic/expected.js
@@ -1,4 +1,5 @@
 "use strict";
 
+var coords = [1, 2];
 var x = coords.x;
 var y = coords.y;
diff --git a/test/fixtures/transformation/es6-properties.computed-loose/argument/expected.js b/test/fixtures/transformation/es6-properties.computed-loose/argument/expected.js
index 3731ff5791..04b57e5996 100644
--- a/test/fixtures/transformation/es6-properties.computed-loose/argument/expected.js
+++ b/test/fixtures/transformation/es6-properties.computed-loose/argument/expected.js
@@ -1,7 +1,5 @@
 "use strict";
 
-foo((function () {
-  var _foo = {};
-  _foo[bar] = "foobar";
-  return _foo;
-})());
+var _foo;
+
+foo((_foo = {}, _foo[bar] = "foobar", _foo));
diff --git a/test/fixtures/transformation/es6-properties.computed-loose/assignment/expected.js b/test/fixtures/transformation/es6-properties.computed-loose/assignment/expected.js
index 190325c4da..9d9df1af31 100644
--- a/test/fixtures/transformation/es6-properties.computed-loose/assignment/expected.js
+++ b/test/fixtures/transformation/es6-properties.computed-loose/assignment/expected.js
@@ -1,7 +1,5 @@
 "use strict";
 
-foo = (function () {
-  var _foo = {};
-  _foo[bar] = "foobar";
-  return _foo;
-})();
+var _foo;
+
+foo = (_foo = {}, _foo[bar] = "foobar", _foo);
diff --git a/test/fixtures/transformation/es6-properties.computed-loose/ignore-symbol/expected.js b/test/fixtures/transformation/es6-properties.computed-loose/ignore-symbol/expected.js
index 96612ae7ad..b6290c7e20 100644
--- a/test/fixtures/transformation/es6-properties.computed-loose/ignore-symbol/expected.js
+++ b/test/fixtures/transformation/es6-properties.computed-loose/ignore-symbol/expected.js
@@ -1,7 +1,5 @@
 "use strict";
 
-var foo = (function () {
-  var _foo = {};
-  _foo[Symbol.iterator] = "foobar";
-  return _foo;
-})();
+var _foo;
+
+var foo = (_foo = {}, _foo[Symbol.iterator] = "foobar", _foo);
diff --git a/test/fixtures/transformation/es6-properties.computed-loose/mixed/expected.js b/test/fixtures/transformation/es6-properties.computed-loose/mixed/expected.js
index a31474e280..3d6db24771 100644
--- a/test/fixtures/transformation/es6-properties.computed-loose/mixed/expected.js
+++ b/test/fixtures/transformation/es6-properties.computed-loose/mixed/expected.js
@@ -1,10 +1,5 @@
 "use strict";
 
-var obj = (function () {
-  var _obj = {};
-  _obj["x" + foo] = "heh";
-  _obj["y" + bar] = "noo";
-  _obj.foo = "foo";
-  _obj.bar = "bar";
-  return _obj;
-})();
+var _obj;
+
+var obj = (_obj = {}, _obj["x" + foo] = "heh", _obj["y" + bar] = "noo", _obj.foo = "foo", _obj.bar = "bar", _obj);
diff --git a/test/fixtures/transformation/es6-properties.computed-loose/multiple/expected.js b/test/fixtures/transformation/es6-properties.computed-loose/multiple/expected.js
index d1d1e8b1d1..6a23087ca8 100644
--- a/test/fixtures/transformation/es6-properties.computed-loose/multiple/expected.js
+++ b/test/fixtures/transformation/es6-properties.computed-loose/multiple/expected.js
@@ -1,8 +1,5 @@
 "use strict";
 
-var obj = (function () {
-  var _obj = {};
-  _obj["x" + foo] = "heh";
-  _obj["y" + bar] = "noo";
-  return _obj;
-})();
+var _obj;
+
+var obj = (_obj = {}, _obj["x" + foo] = "heh", _obj["y" + bar] = "noo", _obj);
diff --git a/test/fixtures/transformation/es6-properties.computed-loose/single/expected.js b/test/fixtures/transformation/es6-properties.computed-loose/single/expected.js
index 774b07f4d4..5edaf8d9e8 100644
--- a/test/fixtures/transformation/es6-properties.computed-loose/single/expected.js
+++ b/test/fixtures/transformation/es6-properties.computed-loose/single/expected.js
@@ -1,7 +1,5 @@
 "use strict";
 
-var obj = (function () {
-  var _obj = {};
-  _obj["x" + foo] = "heh";
-  return _obj;
-})();
+var _obj;
+
+var obj = (_obj = {}, _obj["x" + foo] = "heh", _obj);
diff --git a/test/fixtures/transformation/es6-properties.computed-loose/this/expected.js b/test/fixtures/transformation/es6-properties.computed-loose/this/expected.js
index fc7d1bd4c7..e5db7b747f 100644
--- a/test/fixtures/transformation/es6-properties.computed-loose/this/expected.js
+++ b/test/fixtures/transformation/es6-properties.computed-loose/this/expected.js
@@ -1,7 +1,5 @@
 "use strict";
 
-var obj = (function () {
-  var _obj = {};
-  _obj["x" + foo.bar] = "heh";
-  return _obj;
-})();
+var _obj;
+
+var obj = (_obj = {}, _obj["x" + foo.bar] = "heh", _obj);
diff --git a/test/fixtures/transformation/es6-properties.computed-loose/two/expected.js b/test/fixtures/transformation/es6-properties.computed-loose/two/expected.js
index 523a93dcb7..349f1e881e 100644
--- a/test/fixtures/transformation/es6-properties.computed-loose/two/expected.js
+++ b/test/fixtures/transformation/es6-properties.computed-loose/two/expected.js
@@ -1,8 +1,5 @@
 "use strict";
 
-var obj = (function () {
-  var _obj = {};
-  _obj.first = "first";
-  _obj.second = "second";
-  return _obj;
-})();
+var _obj;
+
+var obj = (_obj = {}, _obj.first = "first", _obj.second = "second", _obj);
diff --git a/test/fixtures/transformation/es6-properties.computed-loose/variable/expected.js b/test/fixtures/transformation/es6-properties.computed-loose/variable/expected.js
index 656ac58d4c..33f0163d3a 100644
--- a/test/fixtures/transformation/es6-properties.computed-loose/variable/expected.js
+++ b/test/fixtures/transformation/es6-properties.computed-loose/variable/expected.js
@@ -1,7 +1,5 @@
 "use strict";
 
-var foo = (function () {
-  var _foo = {};
-  _foo[bar] = "foobar";
-  return _foo;
-})();
+var _foo;
+
+var foo = (_foo = {}, _foo[bar] = "foobar", _foo);
diff --git a/test/fixtures/transformation/es6-properties.computed/ignore-symbol/expected.js b/test/fixtures/transformation/es6-properties.computed/ignore-symbol/expected.js
index 96612ae7ad..b6290c7e20 100644
--- a/test/fixtures/transformation/es6-properties.computed/ignore-symbol/expected.js
+++ b/test/fixtures/transformation/es6-properties.computed/ignore-symbol/expected.js
@@ -1,7 +1,5 @@
 "use strict";
 
-var foo = (function () {
-  var _foo = {};
-  _foo[Symbol.iterator] = "foobar";
-  return _foo;
-})();
+var _foo;
+
+var foo = (_foo = {}, _foo[Symbol.iterator] = "foobar", _foo);
diff --git a/test/fixtures/transformation/es6-properties.computed/mixed/expected.js b/test/fixtures/transformation/es6-properties.computed/mixed/expected.js
index f8f870ed3e..225abc7834 100644
--- a/test/fixtures/transformation/es6-properties.computed/mixed/expected.js
+++ b/test/fixtures/transformation/es6-properties.computed/mixed/expected.js
@@ -1,10 +1,5 @@
 "use strict";
 
-var obj = (function () {
-  var _obj = {};
-  babelHelpers.defineProperty(_obj, "x" + foo, "heh");
-  babelHelpers.defineProperty(_obj, "y" + bar, "noo");
-  babelHelpers.defineProperty(_obj, "foo", "foo");
-  babelHelpers.defineProperty(_obj, "bar", "bar");
-  return _obj;
-})();
+var _obj;
+
+var obj = (_obj = {}, babelHelpers.defineProperty(_obj, "x" + foo, "heh"), babelHelpers.defineProperty(_obj, "y" + bar, "noo"), babelHelpers.defineProperty(_obj, "foo", "foo"), babelHelpers.defineProperty(_obj, "bar", "bar"), _obj);
diff --git a/test/fixtures/transformation/es6-properties.computed/multiple/expected.js b/test/fixtures/transformation/es6-properties.computed/multiple/expected.js
index 2dda4c9afc..9da44049fe 100644
--- a/test/fixtures/transformation/es6-properties.computed/multiple/expected.js
+++ b/test/fixtures/transformation/es6-properties.computed/multiple/expected.js
@@ -1,8 +1,5 @@
 "use strict";
 
-var obj = (function () {
-  var _obj = {};
-  babelHelpers.defineProperty(_obj, "x" + foo, "heh");
-  babelHelpers.defineProperty(_obj, "y" + bar, "noo");
-  return _obj;
-})();
+var _obj;
+
+var obj = (_obj = {}, babelHelpers.defineProperty(_obj, "x" + foo, "heh"), babelHelpers.defineProperty(_obj, "y" + bar, "noo"), _obj);