diff --git a/.travis.yml b/.travis.yml
index b97b954663..26c2eab1a9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,8 +11,31 @@ python:
     - "3.4"
     - "3.5"
     - "3.6"
+
+matrix:
+    include:
+        - node_js: "lts/*"
+          language: node_js
+          python: ""
+          addons:
+              firefox: "45.0"
+          env: TEST_SUITE=js_unittests
+        - node_js: "lts/*"
+          language: node_js
+          python: ""
+          addons:
+              firefox: latest-esr
+          env: TEST_SUITE=js_unittests
+
+before_install:
+    - . src/ci_scripts/travis_before_install.sh
+
+before_script:
+    - . src/ci_scripts/travis_before_script.sh
+
 script:
     - src/ci_scripts/travis.sh sqlite3 django$DJANGO_VERSION unittest
+
 branches:
-  only:
-    - develop
+    only:
+        - develop
diff --git a/src/.eslintrc b/src/.eslintrc
index 2a15798a95..1e450ddbed 100644
--- a/src/.eslintrc
+++ b/src/.eslintrc
@@ -48,6 +48,7 @@
       {
         "newIsCap": true,
         "capIsNew": true,
+        "capIsNewExceptions": ["URLify"],
         "properties": true
       }
     ],
diff --git a/src/GruntFile.js b/src/GruntFile.js
index 6c749c851d..66eacc6aeb 100644
--- a/src/GruntFile.js
+++ b/src/GruntFile.js
@@ -1,5 +1,6 @@
 /*
  *     Copyright (c) 2016-2017 CoNWeT Lab., Universidad Politécnica de Madrid
+ *     Copyright (c) 2018 Future Internet Consulting and Development Solutions S.L.
  *
  *     This file is part of Wirecloud Platform.
  *
@@ -156,14 +157,17 @@ module.exports = function (grunt) {
             options: {
                 frameworks: ['jasmine'],
                 reporters: ['progress', 'coverage'],
-                browsers: ['Chrome', 'Firefox'],
+                browsers: ['Firefox'],
                 singleRun: true
             },
             styledelements: {
                 options: {
                     coverageReporter: {
-                        type : 'html',
-                        dir : 'build/coverage/styledelements'
+                        reporters: [
+                            {type: 'html', dir: 'build/coverage/styledelements', subdir: 'html'},
+                            {type: 'cobertura', dir: 'build/coverage/styledelements', subdir: 'xml'},
+                            {type: 'lcov', dir: 'build/coverage/styledelements', subdir: 'lcov'},
+                        ]
                     },
                     files: dependencies.concat(styledElementsFiles).concat(['js_tests/styledelements/*Spec.js']),
                     preprocessors: {
@@ -174,8 +178,11 @@ module.exports = function (grunt) {
             wirecloud: {
                 options: {
                     coverageReporter: {
-                        type : 'html',
-                        dir : 'build/coverage/wirecloud'
+                        reporters: [
+                            {type: 'html', dir: 'build/coverage/wirecloud', subdir: 'html'},
+                            {type: 'cobertura', dir: 'build/coverage/wirecloud', subdir: 'xml'},
+                            {type: 'lcov', dir: 'build/coverage/wirecloud', subdir: 'lcov'},
+                        ]
                     },
                     files: dependencies.concat(styledElementsFiles).concat(wc_dependencies).concat(WirecloudFiles).concat(['js_tests/wirecloud/**/*Spec.js']),
                     preprocessors: {
@@ -224,6 +231,8 @@ module.exports = function (grunt) {
         'karma'
     ]);
 
+    grunt.registerTask('ci', ['test']);
+
     grunt.registerTask('default', [
         'test',
         'uglify',
diff --git a/src/ci_scripts/travis.sh b/src/ci_scripts/travis.sh
index f009d5419b..081f6b9a72 100755
--- a/src/ci_scripts/travis.sh
+++ b/src/ci_scripts/travis.sh
@@ -1,5 +1,12 @@
 #!/usr/bin/env bash
 
+if [ "${TEST_SUITE}" == "js_unittests" ]; then
+    cd $TRAVIS_BUILD_DIR/src
+    grunt ci
+    exit
+fi
+
+
 export WC_INSTANCE_NAME=test_instance
 [ -n "${IP_ADDR}" ] || IP_ADDR="localhost"
 
diff --git a/src/ci_scripts/travis_before_install.sh b/src/ci_scripts/travis_before_install.sh
new file mode 100755
index 0000000000..060c33fb39
--- /dev/null
+++ b/src/ci_scripts/travis_before_install.sh
@@ -0,0 +1,6 @@
+if [ "${TEST_SUITE}" == "js_unittests" ]; then
+    cd $TRAVIS_BUILD_DIR/src
+    npm install grunt-cli -g
+    npm install
+    cd $TRAVIS_BUILD_DIR
+fi
diff --git a/src/ci_scripts/travis_before_script.sh b/src/ci_scripts/travis_before_script.sh
new file mode 100755
index 0000000000..6c603c4850
--- /dev/null
+++ b/src/ci_scripts/travis_before_script.sh
@@ -0,0 +1,5 @@
+if [ "${TEST_SUITE}" == "js_unittests" ]; then
+    export DISPLAY=:99.0
+    sh -e /etc/init.d/xvfb start
+    sleep 3 # give xvfb some time to start
+fi
diff --git a/src/js_tests/styledelements/GUIBuilderSpec.js b/src/js_tests/styledelements/GUIBuilderSpec.js
index 5b6af30a9a..4e0876f28a 100644
--- a/src/js_tests/styledelements/GUIBuilderSpec.js
+++ b/src/js_tests/styledelements/GUIBuilderSpec.js
@@ -205,24 +205,25 @@
         check_template_context_type("function returning elements",
             function (options) {
                 var element = document.createElement('div');
+                element.textContent = 'a';
                 if (options != null && 'class' in options) {
                     element.className = options.class;
                 }
                 return element;
             },
-            '<div></div>',
-            '<div class="my-class"></div>'
+            '<div>a</div>',
+            '<div class="my-class">a</div>'
         );
         check_template_context_type("function returning styled elements",
             function (options) {
-                var element = new StyledElements.Button();
+                var element = new StyledElements.Button({text: 'a'});
                 if (options != null && 'class' in options) {
                     element.addClassName(options.class);
                 }
                 return element;
             },
-            '<div class="se-btn"></div>',
-            '<div class="se-btn my-class"></div>'
+            '<div class="se-btn"><span>a</span></div>',
+            '<div class="se-btn my-class"><span>a</span></div>'
         );
         check_template_context_type("function returning null", function (options) {return null;});
 
diff --git a/src/js_tests/wirecloud/TaskSpec.js b/src/js_tests/wirecloud/TaskSpec.js
index fc0b03b4d1..0256f2b94f 100644
--- a/src/js_tests/wirecloud/TaskSpec.js
+++ b/src/js_tests/wirecloud/TaskSpec.js
@@ -726,11 +726,7 @@
             });
 
             it("title parameter is not required", () => {
-                var task_update, task_resolve;
-
                 var subtask = new Wirecloud.Task("subtask title", (resolve, reject, update) => {
-                    task_update = update;
-                    task_resolve = resolve;
                     update(50);
                 });
 
diff --git a/src/wirecloud/platform/static/js/wirecloud/Workspace.js b/src/wirecloud/platform/static/js/wirecloud/Workspace.js
index 2a1dea3e21..7549f58cb5 100644
--- a/src/wirecloud/platform/static/js/wirecloud/Workspace.js
+++ b/src/wirecloud/platform/static/js/wirecloud/Workspace.js
@@ -19,7 +19,7 @@
  *
  */
 
-/* globals encodeURIComponent, StyledElements, Wirecloud */
+/* globals encodeURIComponent, StyledElements, URLify, Wirecloud */
 
 
 (function (ns, se, utils) {
@@ -217,7 +217,7 @@
         });
 
         this.contextManager.modify({
-            title: data.title != null && data.title.trim() != "" ? data.title : data.name,
+            title: data.title != null && data.title.trim() !== "" ? data.title : data.name,
             name: data.name,
             owner: data.owner,
             description: data.description,
diff --git a/src/wirecloud/platform/static/js/wirecloud/core.js b/src/wirecloud/platform/static/js/wirecloud/core.js
index 879ac93b2d..400ba97027 100644
--- a/src/wirecloud/platform/static/js/wirecloud/core.js
+++ b/src/wirecloud/platform/static/js/wirecloud/core.js
@@ -273,7 +273,7 @@
         } else if ('owner' in workspace && 'name' in workspace) {
             url = Wirecloud.URLs.WORKSPACE_ENTRY_OWNER_NAME.evaluate({'owner': workspace.owner, 'name': workspace.name});
         } else {
-            throw TypeError('use the id parameter or the owner/name pair of parameters');
+            throw new TypeError('use the id parameter or the owner/name pair of parameters');
         }
 
         return Wirecloud.io.makeRequest(url, {
@@ -313,7 +313,7 @@
         }, options);
 
         if (!('owner' in workspace && 'name' in workspace) && !('id' in workspace)) {
-            throw TypeError('use the id parameter or the owner/name pair of parameters');
+            throw new TypeError('use the id parameter or the owner/name pair of parameters');
         }
 
         if (!('owner' in workspace) || !('name' in workspace)) {