diff --git a/lib/contributors/add.test.js b/lib/contributors/add.test.js
index fc75ce2..6ea20d3 100644
--- a/lib/contributors/add.test.js
+++ b/lib/contributors/add.test.js
@@ -54,9 +54,9 @@ test.cb('should add new contributor at the end of the list of contributors', t =
   const contributions = ['doc'];
 
   return addContributor(options, username, contributions, mockInfoFetcher, function (error, contributors) {
-    t.notOk(error);
+    t.falsy(error);
     t.is(contributors.length, 3);
-    t.same(contributors[2], {
+    t.deepEqual(contributors[2], {
       login: 'login3',
       name: 'Some name',
       avatar_url: 'www.avatar.url',
@@ -76,9 +76,9 @@ test.cb('should add new contributor at the end of the list of contributors with
   options.url = 'www.foo.bar';
 
   return addContributor(options, username, contributions, mockInfoFetcher, function (error, contributors) {
-    t.notOk(error);
+    t.falsy(error);
     t.is(contributors.length, 3);
-    t.same(contributors[2], {
+    t.deepEqual(contributors[2], {
       login: 'login3',
       name: 'Some name',
       avatar_url: 'www.avatar.url',
@@ -97,8 +97,8 @@ test.cb(`should not update an existing contributor's contributions where nothing
   const contributions = ['blog', 'code'];
 
   return addContributor(options, username, contributions, mockInfoFetcher, function (error, contributors) {
-    t.notOk(error);
-    t.same(contributors, options.contributors);
+    t.falsy(error);
+    t.deepEqual(contributors, options.contributors);
     t.end();
   });
 });
@@ -108,9 +108,9 @@ test.cb(`should update an existing contributor's contributions if a new type is
   const username = 'login1';
   const contributions = ['bug'];
   return addContributor(options, username, contributions, mockInfoFetcher, function (error, contributors) {
-    t.notOk(error);
+    t.falsy(error);
     t.is(contributors.length, 2);
-    t.same(contributors[0], {
+    t.deepEqual(contributors[0], {
       login: 'login1',
       name: 'Some name',
       avatar_url: 'www.avatar.url',
@@ -131,9 +131,9 @@ test.cb(`should update an existing contributor's contributions if a new type is
   options.url = 'www.foo.bar';
 
   return addContributor(options, username, contributions, mockInfoFetcher, function (error, contributors) {
-    t.notOk(error);
+    t.falsy(error);
     t.is(contributors.length, 2);
-    t.same(contributors[0], {
+    t.deepEqual(contributors[0], {
       login: 'login1',
       name: 'Some name',
       avatar_url: 'www.avatar.url',
diff --git a/package.json b/package.json
index f30b053..b141b15 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
     "yargs": "^4.3.2"
   },
   "devDependencies": {
-    "ava": "^0.13.0",
+    "ava": "^0.14.0",
     "eslint": "^2.4.0",
     "eslint-plugin-ava": "^1.2.1",
     "xo": "^0.13.0"