diff --git a/app/modules/prover/lib/blockGenerator.ts b/app/modules/prover/lib/blockGenerator.ts
index 5562d1055..1889d1250 100644
--- a/app/modules/prover/lib/blockGenerator.ts
+++ b/app/modules/prover/lib/blockGenerator.ts
@@ -171,7 +171,8 @@ export class BlockGenerator {
     const members = await this.dal.getMembers();
     const wotMembers = _.pluck(members, 'pubkey');
     // Checking step
-    const newcomers = _(joinData).keys();
+    let newcomers = _(joinData).keys();
+    newcomers = _.shuffle(newcomers)
     const nextBlockNumber = current ? current.number + 1 : 0;
     try {
       const realNewcomers = await this.iteratedChecking(newcomers, async (someNewcomers:string[]) => {
diff --git a/test/integration/newcomers-shuffling.js b/test/integration/newcomers-shuffling.js
new file mode 100644
index 000000000..6d9e0ffd2
--- /dev/null
+++ b/test/integration/newcomers-shuffling.js
@@ -0,0 +1,58 @@
+"use strict";
+
+const _ = require('underscore');
+const co        = require('co');
+const assert    = require('assert');
+const user      = require('./tools/user');
+const commit    = require('./tools/commit');
+const toolbox   = require('./tools/toolbox');
+
+let s1, cat, tac, toc, tic
+
+describe("Newcomers shuffling", function() {
+
+  before(() => co(function*() {
+
+    s1 = toolbox.server({
+      pair: {
+        pub: 'HgTTJLAQ5sqfknMq7yLPZbehtuLSsKj9CxWN7k8QvYJd',
+        sec: '51w4fEShBk1jCMauWu4mLpmDVfHksKmWcygpxriqCEZizbtERA6de4STKRkQBpxmMUwsKXRjSzuQ8ECwmqN1u2DP'
+      }
+    });
+
+    cat = user('cat', { pub: 'HgTTJLAQ5sqfknMq7yLPZbehtuLSsKj9CxWN7k8QvYJd', sec: '51w4fEShBk1jCMauWu4mLpmDVfHksKmWcygpxriqCEZizbtERA6de4STKRkQBpxmMUwsKXRjSzuQ8ECwmqN1u2DP'}, { server: s1 });
+    tac = user('tac', { pub: '2LvDg21dVXvetTD9GdkPLURavLYEqP3whauvPWX4c2qc', sec: '2HuRLWgKgED1bVio1tdpeXrf7zuUszv1yPHDsDj7kcMC4rVSN9RC58ogjtKNfTbH1eFz7rn38U1PywNs3m6Q7UxE'}, { server: s1 });
+    toc = user('toc', { pub: 'DKpQPUL4ckzXYdnDRvCRKAm1gNvSdmAXnTrJZ7LvM5Qo', sec: '64EYRvdPpTfLGGmaX5nijLXRqWXaVz8r1Z1GtaahXwVSJGQRn7tqkxLb288zwSYzELMEG5ZhXSBYSxsTsz1m9y8F'}, { server: s1 });
+    tic = user('tic', { pub: 'DNann1Lh55eZMEDXeYt59bzHbA3NJR46DeQYCS2qQdLV', sec: '468Q1XtTq7h84NorZdWBZFJrGkB18CbmbHr9tkp9snt5GiERP7ySs3wM8myLccbAAGejgMRC9rqnXuW3iAfZACm7'}, { server: s1 });
+
+    yield s1.prepareForNetwork();
+
+    // Publishing identities
+    yield cat.createIdentity();
+    yield tac.createIdentity();
+    yield cat.cert(tac);
+    yield tac.cert(cat);
+    yield cat.join();
+    yield tac.join();
+    yield s1.commit()
+  }));
+
+  after(() => {
+    return Promise.all([
+      s1.closeCluster()
+    ])
+  })
+
+  it('toc and tic could join ', () => co(function*() {
+    yield toc.createIdentity();
+    yield tic.createIdentity();
+    yield toc.join();
+    yield tic.join();
+    // same certifier for toc and tic
+    yield cat.cert(toc)
+    yield cat.cert(tic)
+    // We do not known which one of toc or tic will be the first in!
+    yield s1.commit()
+    yield s1.commit()
+  }));
+});