diff --git a/package.json b/package.json
index 30c225c..343b20d 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "babel-runtime": "~5.8.3"
   },
   "peerDependencies": {
-    "graphql": "~0.2.6"
+    "graphql": "~0.3.0"
   },
   "devDependencies": {
     "babel": "5.8.3",
@@ -53,7 +53,7 @@
     "chai-as-promised": "5.1.0",
     "eslint": "0.24.0",
     "flow-bin": "0.13.1",
-    "graphql": "0.2.6",
+    "graphql": "0.3.0",
     "mocha": "2.2.5",
     "sane": "1.1.3"
   }
diff --git a/src/mutation/__tests__/mutation.js b/src/mutation/__tests__/mutation.js
index bd6c125..36689d9 100644
--- a/src/mutation/__tests__/mutation.js
+++ b/src/mutation/__tests__/mutation.js
@@ -57,7 +57,7 @@ var schema = new GraphQLSchema({
 
 describe('mutationWithClientMutationId', () => {
   describe('Behaves correctly', () => {
-    it('Requires an argument', () => {
+    it('Requires an argument', async () => {
       var query = `
         mutation M {
           simpleMutation {
@@ -65,18 +65,9 @@ describe('mutationWithClientMutationId', () => {
           }
         }
       `;
-      var expected = {
-        errors: [{
-          locations: [
-            {
-              column: 11,
-              line: 3
-            }
-          ],
-          message: 'Field \"simpleMutation\" argument \"input\" of type \"SimpleMutationInput!\" is required but not provided.',
-        }]
-      };
-      return expect(graphql(schema, query)).to.become(expected);
+      var result = await graphql(schema, query);
+      expect(result.errors.length).to.equal(1);
+      expect(result.errors[0].message).to.equal('Field \"simpleMutation\" argument \"input\" of type \"SimpleMutationInput!\" is required but not provided.');
     });
 
     it('Returns the same client mutation ID', () => {