diff --git a/src/helpers.js b/src/helpers.js
index 3c63c79..21bf2aa 100644
--- a/src/helpers.js
+++ b/src/helpers.js
@@ -1,5 +1,5 @@
-export const PROXY_PREFIX = '\0commonjs-proxy:';
-export const EXTERNAL_PREFIX = '\0commonjs-external:';
+export const PROXY_PREFIX = '\0commonjs-proxy-';
+export const EXTERNAL_PREFIX = '\0commonjs-external-';
 export const HELPERS_ID = '\0commonjsHelpers.js';
 
 // `x['default']` is used instead of `x.default` for backward compatibility with ES3 browsers.
diff --git a/test/form/constant-template-literal/output.js b/test/form/constant-template-literal/output.js
index 781cf36..719857f 100644
--- a/test/form/constant-template-literal/output.js
+++ b/test/form/constant-template-literal/output.js
@@ -1,5 +1,5 @@
 import 'tape';
-import foo from 'commonjs-proxy:tape';
+import foo from 'commonjs-proxy-tape';
 
 console.log(foo);
 
diff --git a/test/form/ignore-ids-function/output.js b/test/form/ignore-ids-function/output.js
index c270437..31ced5b 100644
--- a/test/form/ignore-ids-function/output.js
+++ b/test/form/ignore-ids-function/output.js
@@ -1,5 +1,5 @@
 import 'bar';
-import bar from 'commonjs-proxy:bar';
+import bar from 'commonjs-proxy-bar';
 
 var foo = require( 'foo' );
 
diff --git a/test/form/ignore-ids/output.js b/test/form/ignore-ids/output.js
index c270437..31ced5b 100644
--- a/test/form/ignore-ids/output.js
+++ b/test/form/ignore-ids/output.js
@@ -1,5 +1,5 @@
 import 'bar';
-import bar from 'commonjs-proxy:bar';
+import bar from 'commonjs-proxy-bar';
 
 var foo = require( 'foo' );
 
diff --git a/test/form/multiple-var-declarations-b/output.js b/test/form/multiple-var-declarations-b/output.js
index c2af7f4..8730a4b 100644
--- a/test/form/multiple-var-declarations-b/output.js
+++ b/test/form/multiple-var-declarations-b/output.js
@@ -1,5 +1,5 @@
 import './a';
-import a from 'commonjs-proxy:./a';
+import a from 'commonjs-proxy-./a';
 
 var b = 42;
 
diff --git a/test/form/multiple-var-declarations-c/output.js b/test/form/multiple-var-declarations-c/output.js
index cd331c6..2fc0700 100644
--- a/test/form/multiple-var-declarations-c/output.js
+++ b/test/form/multiple-var-declarations-c/output.js
@@ -1,5 +1,5 @@
 import './b';
-import b from 'commonjs-proxy:./b';
+import b from 'commonjs-proxy-./b';
 
 var a = 'a'
   , c = 'c';
diff --git a/test/form/multiple-var-declarations/output.js b/test/form/multiple-var-declarations/output.js
index 38b3d13..a42d461 100644
--- a/test/form/multiple-var-declarations/output.js
+++ b/test/form/multiple-var-declarations/output.js
@@ -1,7 +1,7 @@
 import './a';
 import './b';
-import require$$0 from 'commonjs-proxy:./a';
-import b from 'commonjs-proxy:./b';
+import require$$0 from 'commonjs-proxy-./a';
+import b from 'commonjs-proxy-./b';
 
 var a = require$$0();
 
diff --git a/test/form/require-collision/output.js b/test/form/require-collision/output.js
index 58c8728..e0c68f3 100644
--- a/test/form/require-collision/output.js
+++ b/test/form/require-collision/output.js
@@ -1,5 +1,5 @@
 import 'foo';
-import require$$1 from 'commonjs-proxy:foo';
+import require$$1 from 'commonjs-proxy-foo';
 
 (function() {
   var foo = require$$1;