diff --git a/www/scripts/apps/admin/tasks-manager/app.js b/www/scripts/apps/admin/tasks-manager/app.js
index b2ddbbfab3..051f04972b 100644
--- a/www/scripts/apps/admin/tasks-manager/app.js
+++ b/www/scripts/apps/admin/tasks-manager/app.js
@@ -27,7 +27,6 @@ define([
             $pingView : $(".ping-view", this.$scope),
             $refreshView : $(".refresh-view", this.$scope),
             eventAggregator: _.extend({}, Backbone.Events),
-            wsuri: "ws://dev.phrasea.net:9090/websockets",
             wstopic: "http://phraseanet.com/topics/admin/task-manager"
         };
 
@@ -57,18 +56,14 @@ define([
                 TaskManagerApp.tasksView.render();
                 TaskManagerApp.schedulerView.render();
 
-                // Sets connection to the web socket
-                var ws = WSConnection.getInstance(TaskManagerApp.wsuri);
-                ws.connect();
-
-                ws.subscribe(TaskManagerApp.wstopic, function(topic, msg) {
+                WSConnection.subscribe(TaskManagerApp.wstopic, function(topic, msg) {
                     // double encoded string
                     var msg = JSON.parse(JSON.parse(msg));
-                    TaskManagerApp.eventAggregator.trigger("ws:"+msg.event, msg);
+                    WSConnection.trigger("ws:"+msg.event, msg);
                 });
 
                 // On ticks re-render ping view, update tasks & scheduler model
-                TaskManagerApp.eventAggregator.on("ws:manager-tick", function(response) {
+                WSConnection.on("ws:manager-tick", function(response) {
                     TaskManagerApp.pingView.render();
                     TaskManagerApp.Scheduler.set({"actual": "started", "process-id": response.message.manager["process-id"]});
                     _.each(response.message.jobs, function(data, id) {
diff --git a/www/scripts/common/websockets/connection.js b/www/scripts/common/websockets/connection.js
index b270d6b58b..5e982a8e2e 100644
--- a/www/scripts/common/websockets/connection.js
+++ b/www/scripts/common/websockets/connection.js
@@ -2,70 +2,52 @@ define([
     "underscore",
     "backbone"
 ], function (_, Backbone) {
-    var instance;
+    var activeSession = null;
 
-    function init(url) {
-        var activeSession = null;
-
-        return _.extend({
-            connect: function() {
-                if (this.hasSession()) {
-                    return;
-                }
-                var $this = this;
-                // autobahn js is defined as a global object there is no way to load
-                // it as a UMD module
-                ab.connect(url, function (session) {
-                    $this.setSession(session);
-                    $this.trigger("ws:connect", activeSession);
-                },
-                function (code, reason) {
-                    $this.trigger("ws:session-gone", code, reason);
+    return _.extend({
+        connect: function(url) {
+            if (this.hasSession()) {
+                throw "Connection is already active";
+            }
+            var that = this;
+            // autobahn js is defined as a global object there is no way to load
+            // it as a UMD module
+            ab.connect(url, function (session) {
+                that.setSession(session);
+                that.trigger("ws:connect", activeSession);
+            },
+            function (code, reason) {
+                that.trigger("ws:session-gone", code, reason);
+            });
+        },
+        close: function() {
+            if (false === this.hasSession()) {
+                return;
+            }
+            this.getSession().close();
+            this.setSession(null);
+            this.trigger("ws:session-close");
+        },
+        hasSession: function() {
+            return this.getSession() !== null;
+        },
+        subscribe: function(topic, callback) {
+            if (false === this.hasSession()) {
+                this.on("ws:connect", function(session) {
+                    session.subscribe(topic, callback);
+                    this.trigger("ws:session-subscribe", topic);
                 });
-            },
-            close: function() {
-                if (false === this.hasSession()) {
-                    return;
-                }
-                this.getSession().close();
-                this.setSession(null);
-                this.trigger("ws:session-close");
-            },
-            hasSession: function() {
-                return this.getSession() !== null;
-            },
-            getSession: function() {
-                return activeSession;
-            },
-            setSession: function(session) {
-                activeSession = session;
-            },
-            subscribe: function(topic, callback) {
-                if (false === this.hasSession()) {
-                    this.on("ws:connect", function(session) {
-                        session.subscribe(topic, callback);
-                    });
-                    return;
-                }
-                this.getSession().subscribe(topic, callback);
-                this.trigger("ws:session-subscribe", topic);
-            },
-            unsubscribe: function(topic, callback) {
-                if (false === this.hasSession()) {
-                    return;
-                }
-                this.getSession().unsubscribe(topic, callback);
-                this.trigger("ws:session-unsubscribe", topic);
+                return;
             }
-        }, Backbone.Events);
-    }
-
-    return {
-        getInstance: function(url) {
-            if (!instance) {
-                instance = init(url);
+            this.getSession().subscribe(topic, callback);
+            this.trigger("ws:session-subscribe", topic);
+        },
+        unsubscribe: function(topic, callback) {
+            if (false === this.hasSession()) {
+                return;
             }
-            return instance;
+            this.getSession().unsubscribe(topic, callback);
+            this.trigger("ws:session-unsubscribe", topic);
         }
-    };
+    }, Backbone.Events);
 });
diff --git a/www/scripts/tests/specs/websockets/connection.js b/www/scripts/tests/specs/websockets/connection.js
index 7b326361a6..2c01148b2c 100644
--- a/www/scripts/tests/specs/websockets/connection.js
+++ b/www/scripts/tests/specs/websockets/connection.js
@@ -17,7 +17,7 @@ define([
                 this.session.subscribe = sinon.spy();
                 this.session.unsubscribe = sinon.spy();
 
-                this.wsConnection = connection.getInstance();
+                this.wsConnection = connection;
                 var $this = this;
                 var cbSuccess = function (session) {
                     $this.wsConnection.setSession($this.session);
@@ -29,6 +29,10 @@ define([
                 }
             });
 
+            afterEach(function () {
+                this.wsConnection.close();
+            });
+
             it("should have a session", function () {
                 this.wsConnection.connect();
                 assert.ok(this.wsConnection.hasSession());
@@ -48,12 +52,15 @@ define([
             });
 
             it("should not connect anymore after first connect", function () {
+                var throws = false;
                 this.wsConnection.connect();
-                ab.connect = sinon.spy();
-                this.wsConnection.connect();
-                this.wsConnection.connect();
-                this.wsConnection.connect();
-                expect(ab.connect.should.have.callCount(0)).to.be.ok;
+                try {
+                    this.wsConnection.connect();
+                } catch (e) {
+                    throws = true;
+                }
+
+                assert.ok(throws);
             });
 
             it("should call session subscribe once", function () {