diff --git a/circle.yml b/circle.yml
index f848dd3..169dd10 100644
--- a/circle.yml
+++ b/circle.yml
@@ -8,3 +8,7 @@ machine:
 dependencies:
   pre:
     - mkdir minecraft-server
+test:
+  override:
+    - npm test:
+        parallel: true
diff --git a/test/benchmark.js b/test/benchmark.js
index e5adfd6..1209364 100644
--- a/test/benchmark.js
+++ b/test/benchmark.js
@@ -11,7 +11,14 @@ var testDataWrite = [
   // TODO: add more packets for better quality data
 ];
 
-mc.supportedVersions.forEach(function(supportedVersion){
+
+const {firstVersion,lastVersion}=require("./common/parallel");
+console.log({firstVersion,lastVersion});
+
+mc.supportedVersions.forEach(function(supportedVersion,i){
+  if(!(i>=firstVersion && i<=lastVersion))
+    return;
+  
   var mcData=require("minecraft-data")(supportedVersion);
   var version=mcData.version;
   describe("benchmark "+version.minecraftVersion,function(){
diff --git a/test/clientTest.js b/test/clientTest.js
index 575705b..8304228 100644
--- a/test/clientTest.js
+++ b/test/clientTest.js
@@ -7,11 +7,15 @@ var MC_SERVER_PATH = path.join(__dirname, 'server');
 
 var Wrap = require('minecraft-wrap').Wrap;
 
+const {firstVersion,lastVersion}=require("./common/parallel");
+
 
 var download = require('minecraft-wrap').download;
 
+mc.supportedVersions.forEach(function(supportedVersion,i) {
+  if(!(i>=firstVersion && i<=lastVersion))
+    return;
 
-mc.supportedVersions.forEach(function(supportedVersion) {
   var PORT=Math.round(30000+Math.random()*20000);
   var mcData = require("minecraft-data")(supportedVersion);
   var version = mcData.version;
diff --git a/test/common/parallel.js b/test/common/parallel.js
new file mode 100644
index 0000000..3c53612
--- /dev/null
+++ b/test/common/parallel.js
@@ -0,0 +1,22 @@
+const nodeIndex=parseInt(process.env.CIRCLE_NODE_INDEX);
+const nodeTotal=parseInt(process.env.CIRCLE_NODE_TOTAL);
+const parallel=process.env.CIRCLE_NODE_INDEX!==undefined && process.env.CIRCLE_NODE_TOTAL!==undefined;
+const mc = require("../../");
+
+
+// expected values :
+// (0,4,10) -> (0,2)
+// (1,4,10) -> (3,5)
+// (2,4,10) -> (6,8)
+// (3,4,10) -> (9,9)
+function testedRange(nodeIndex,nodeTotal,numberOfVersions) {
+  const nbFirsts=Math.ceil(numberOfVersions/nodeTotal);
+  if(nodeIndex==(nodeTotal-1))
+    return {firstVersion:nbFirsts*nodeIndex,lastVersion:numberOfVersions-1};
+
+  return {firstVersion:nodeIndex*nbFirsts,lastVersion:(nodeIndex+1)*nbFirsts-1};
+}
+console.log({nodeIndex,nodeTotal,versions:mc.supportedVersions.length});
+const {firstVersion,lastVersion}=parallel ? testedRange(nodeIndex,nodeTotal,mc.supportedVersions.length) : {firstVersion:0,lastVersion:mc.supportedVersions.length-1};
+
+module.exports={firstVersion,lastVersion};
diff --git a/test/packetTest.js b/test/packetTest.js
index 66a633c..e932fed 100644
--- a/test/packetTest.js
+++ b/test/packetTest.js
@@ -142,8 +142,12 @@ function getValue(_type, packet) {
     throw new Error("No value for type " + fieldInfo.type);
 }
 
+const {firstVersion,lastVersion}=require("./common/parallel");
 
-mc.supportedVersions.forEach(function(supportedVersion){
+mc.supportedVersions.forEach(function(supportedVersion,i){
+  if(!(i>=firstVersion && i<=lastVersion))
+    return;
+  
   var PORT=Math.round(30000+Math.random()*20000);
   var mcData=require("minecraft-data")(supportedVersion);
   var version=mcData.version;
diff --git a/test/serverTest.js b/test/serverTest.js
index 0353674..bfec1ee 100644
--- a/test/serverTest.js
+++ b/test/serverTest.js
@@ -1,7 +1,12 @@
 var mc = require('../');
 var assert = require('power-assert');
 
-mc.supportedVersions.forEach(function(supportedVersion){
+const {firstVersion,lastVersion}=require("./common/parallel");
+
+mc.supportedVersions.forEach(function(supportedVersion,i){
+  if(!(i>=firstVersion && i<=lastVersion))
+    return;
+  
   var PORT=Math.round(30000+Math.random()*20000);
   var mcData=require("minecraft-data")(supportedVersion);
   var version=mcData.version;