diff --git a/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/auxiliary-comment/options.json b/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/auxiliary-comment/options.json
new file mode 100644
index 0000000000..c3733ea44e
--- /dev/null
+++ b/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/auxiliary-comment/options.json
@@ -0,0 +1,5 @@
+{
+  "plugins": ["external-helpers-2", "transform-es2015-modules-commonjs"],
+  "auxiliaryCommentBefore": "before",
+  "auxiliaryCommentAfter": "after"
+}
diff --git a/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/auxiliary-comment/overview/actual.js b/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/auxiliary-comment/overview/actual.js
new file mode 100644
index 0000000000..3b32cd0941
--- /dev/null
+++ b/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/auxiliary-comment/overview/actual.js
@@ -0,0 +1,14 @@
+import "foo";
+import "foo-bar";
+import "./directory/foo-bar";
+import foo from "foo2";
+import * as foo2 from "foo3";
+import {bar} from "foo4";
+import {foo as bar2} from "foo5";
+
+export {test};
+export var test = 5;
+
+bar;
+bar2;
+foo;
diff --git a/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/auxiliary-comment/overview/expected.js b/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/auxiliary-comment/overview/expected.js
new file mode 100644
index 0000000000..947e8a0b77
--- /dev/null
+++ b/packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/auxiliary-comment/overview/expected.js
@@ -0,0 +1,38 @@
+/*before*/"use strict";
+
+/*before*/Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+/*before*/exports.test = undefined;
+/*before*/
+require("foo");
+
+/*before*/
+require("foo-bar");
+
+/*before*/
+require("./directory/foo-bar");
+
+/*before*/
+var _foo = require("foo2");
+
+/*before*/
+var _foo2 = babelHelpers.interopRequireDefault(_foo);
+
+/*before*/
+var _foo3 = require("foo3");
+
+/*before*/var /*after*/foo2 = babelHelpers.interopRequireWildcard(_foo3);
+/*before*/
+var _foo4 = require("foo4");
+
+/*before*/
+var _foo5 = require("foo5");
+
+/*before*/exports. /*after*/test = test;
+var test = /*before*/exports. /*after*/test = 5;
+
+/*before*/_foo4. /*after*/bar;
+/*before*/_foo5. /*after*/foo;
+/*before*/_foo2.default;
+/*after*/
diff --git a/packages/babel-plugin-transform-strict-mode/test/fixtures/auxiliary-comment/options.json b/packages/babel-plugin-transform-strict-mode/test/fixtures/auxiliary-comment/options.json
new file mode 100644
index 0000000000..f630e093d5
--- /dev/null
+++ b/packages/babel-plugin-transform-strict-mode/test/fixtures/auxiliary-comment/options.json
@@ -0,0 +1,5 @@
+{
+  "plugins": ["transform-strict-mode", "transform-es2015-modules-commonjs"],
+  "auxiliaryCommentBefore": "before",
+  "auxiliaryCommentAfter": "after"
+}
diff --git a/packages/babel-plugin-transform-strict-mode/test/fixtures/auxiliary-comment/use-strict-add/actual.js b/packages/babel-plugin-transform-strict-mode/test/fixtures/auxiliary-comment/use-strict-add/actual.js
new file mode 100644
index 0000000000..a280f9a5cc
--- /dev/null
+++ b/packages/babel-plugin-transform-strict-mode/test/fixtures/auxiliary-comment/use-strict-add/actual.js
@@ -0,0 +1 @@
+foo();
diff --git a/packages/babel-plugin-transform-strict-mode/test/fixtures/auxiliary-comment/use-strict-add/expected.js b/packages/babel-plugin-transform-strict-mode/test/fixtures/auxiliary-comment/use-strict-add/expected.js
new file mode 100644
index 0000000000..ffb737e4d9
--- /dev/null
+++ b/packages/babel-plugin-transform-strict-mode/test/fixtures/auxiliary-comment/use-strict-add/expected.js
@@ -0,0 +1,3 @@
+/*before*/"use strict";
+
+/*after*/foo();