diff --git a/jest.config.js b/jest.config.js
index 714750d..75f626a 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -10,5 +10,6 @@ module.exports = {
     "js",
     "ts",
     "node"
-  ]
+  ],
+  "testEnvironment": "node"
 }
diff --git a/src/index.ts b/src/index.ts
index 3b595f6..edcc72d 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -2,8 +2,11 @@ import { importSchema } from 'graphql-import'
 
 export default function(source) {
   const callback = this.async();
+  const isFileRegex = /\.graphql$/i
 
   this.cacheable()
 
-  callback(null, `module.exports = \`${importSchema(source).replace(/`/g, '\\`')}\``)
+  const sdl = importSchema(isFileRegex.test(this.resource) ? this.resource : source)
+
+  callback(null, `module.exports = \`${sdl.replace(/`/g, '\\`')}\``)
 }
diff --git a/test/fixtures/complex.graphql b/test/fixtures/complex.graphql
index d85677a..75403f2 100644
--- a/test/fixtures/complex.graphql
+++ b/test/fixtures/complex.graphql
@@ -1,6 +1,6 @@
-# import { A } from 'test/fixtures/a.graphql'
-# import { B } from 'test/fixtures/b.graphql'
-# import { C D } from 'test/fixtures/cd.graphql'
+# import { A } from './a.graphql'
+# import { B } from './b.graphql'
+# import { C D } from './cd.graphql'
 
 type Complex  {
   id: ID!