diff --git a/Calendula/build.gradle b/Calendula/build.gradle
index 82f11da3d..b2d4372e6 100644
--- a/Calendula/build.gradle
+++ b/Calendula/build.gradle
@@ -76,8 +76,8 @@ android {
     defaultConfig {
         minSdkVersion 18
         targetSdkVersion 26
-        versionCode 41
-        versionName "2.5.10"
+        versionCode 42
+        versionName "2.5.11"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         applicationId "es.usc.citius.servando.calendula"
         multiDexEnabled true
diff --git a/Calendula/src/main/java/es/usc/citius/servando/calendula/notifications/NotificationHelper.kt b/Calendula/src/main/java/es/usc/citius/servando/calendula/notifications/NotificationHelper.kt
index c62865d82..aba452288 100644
--- a/Calendula/src/main/java/es/usc/citius/servando/calendula/notifications/NotificationHelper.kt
+++ b/Calendula/src/main/java/es/usc/citius/servando/calendula/notifications/NotificationHelper.kt
@@ -32,7 +32,7 @@ object NotificationHelper {
 
     @JvmField
     val VIBRATION_PATTERN_MEDS =
-        longArrayOf(1000, 200, 100, 500, 400, 200, 100, 500, 400, 200, 100, 500, 1000)
+            longArrayOf(1000, 200, 100, 500, 400, 200, 100, 500, 400, 200, 100, 500, 1000)
     @JvmField
     val VIBRATION_PATTERN_DEFAULT = longArrayOf(1000, 200, 500, 200, 100, 200, 1000)
     @JvmField
@@ -62,18 +62,18 @@ object NotificationHelper {
             val medChannelName = context.getString(R.string.channel_meds_name)
             val medChannelDesc = context.getString(R.string.channel_meds_description)
             val medChannel = NotificationChannel(
-                CHANNEL_MEDS_ID,
-                medChannelName,
-                NotificationManager.IMPORTANCE_HIGH
+                    CHANNEL_MEDS_ID,
+                    medChannelName,
+                    NotificationManager.IMPORTANCE_HIGH
             )
             medChannel.description = medChannelDesc
             //create other channel
             val defaultChannelName = context.getString(R.string.channel_default_name)
             val defaultChannelDesc = context.getString(R.string.channel_default_description)
             val defaultChannel = NotificationChannel(
-                CHANNEL_DEFAULT_ID,
-                defaultChannelName,
-                NotificationManager.IMPORTANCE_DEFAULT
+                    CHANNEL_DEFAULT_ID,
+                    defaultChannelName,
+                    NotificationManager.IMPORTANCE_DEFAULT
             )
 
             defaultChannel.description = defaultChannelDesc
@@ -93,8 +93,8 @@ object NotificationHelper {
     @JvmStatic
     fun isNotificationVibrationEnabled(context: Context): Boolean {
 
-        val vibrationSettingInt =
-            PreferenceUtils.getInt(PreferenceKeys.SETTINGS_NOTIFICATION_VIBRATION, 0)
+        val vibrationSettingInt = Integer.parseInt(
+                PreferenceUtils.getString(PreferenceKeys.SETTINGS_NOTIFICATION_VIBRATION, "0"))
         val audioManager = context.getSystemService(Context.AUDIO_SERVICE) as AudioManager
 
         return when (vibrationSettingInt) {
diff --git a/Calendula/src/test/java/es/usc/citius/servando/calendula/notifications/NotificationHelperTest.kt b/Calendula/src/test/java/es/usc/citius/servando/calendula/notifications/NotificationHelperTest.kt
new file mode 100644
index 000000000..eb9b839bc
--- /dev/null
+++ b/Calendula/src/test/java/es/usc/citius/servando/calendula/notifications/NotificationHelperTest.kt
@@ -0,0 +1,65 @@
+/*
+ *    Calendula - An assistant for personal medication management.
+ *    Copyright (C) 2014-2018 CiTIUS - University of Santiago de Compostela
+ *
+ *    Calendula is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this software.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package es.usc.citius.servando.calendula.notifications
+
+import es.usc.citius.servando.calendula.util.PreferenceKeys
+import es.usc.citius.servando.calendula.util.PreferenceUtils
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.RuntimeEnvironment
+
+
+@RunWith(RobolectricTestRunner::class)
+class NotificationHelperTest {
+
+
+    @Test
+    fun `Vibration is enabled when the vibration preference is the default value`() {
+        PreferenceUtils.edit().remove(PreferenceKeys.SETTINGS_NOTIFICATION_VIBRATION.key()).apply()
+
+        val notificationVibrationEnabled =
+            NotificationHelper.isNotificationVibrationEnabled(RuntimeEnvironment.systemContext)
+
+        assertTrue(notificationVibrationEnabled)
+    }
+
+    @Test
+    fun `Vibration is enabled when the vibration preference is set to vibrate`() {
+        PreferenceUtils.edit().putString(PreferenceKeys.SETTINGS_NOTIFICATION_VIBRATION.key(), "0").apply()
+
+        val notificationVibrationEnabled =
+            NotificationHelper.isNotificationVibrationEnabled(RuntimeEnvironment.systemContext)
+
+        assertTrue(notificationVibrationEnabled)
+    }
+
+
+    @Test
+    fun `Vibration is disabled when the vibration preference is set to off`() {
+        PreferenceUtils.edit().putString(PreferenceKeys.SETTINGS_NOTIFICATION_VIBRATION.key(), "3").apply()
+
+        val notificationVibrationEnabled =
+            NotificationHelper.isNotificationVibrationEnabled(RuntimeEnvironment.systemContext)
+
+        assertFalse(notificationVibrationEnabled)
+    }
+}