diff --git a/build.gradle b/build.gradle
index c9fef295..1d1400b9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -19,6 +19,8 @@ android {
         minSdkVersion rootProject.ext.coreMinSdk
         targetSdkVersion rootProject.ext.coreTargetSdk
 
+        testOptions.unitTests.includeAndroidResources = true
+
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         buildConfigField 'String', 'AUTOLOG_URL', '"https://manager.infomaniak.com/v3/mobile_login"'
         buildConfigField 'String', 'LOGIN_ENDPOINT_URL', '"https://login.infomaniak.com/"'
@@ -87,4 +89,12 @@ dependencies {
     implementation 'com.github.razir.progressbutton:progressbutton:2.1.0'
 
     api 'com.github.matomo-org:matomo-sdk-android:4.1.4'
+
+    testImplementation 'androidx.test:runner:1.1.0'
+
+    testImplementation 'junit:junit:4.13.2'
+    testImplementation libs.core.ktx
+    testImplementation 'androidx.test:core:1.5.0'
+    testImplementation 'org.robolectric:robolectric:4.12'
+
 }
diff --git a/src/test/kotlin/com/infomaniak/lib/core/BasicTest.kt b/src/test/kotlin/com/infomaniak/lib/core/BasicTest.kt
new file mode 100644
index 00000000..c0eaf73c
--- /dev/null
+++ b/src/test/kotlin/com/infomaniak/lib/core/BasicTest.kt
@@ -0,0 +1,38 @@
+/*
+ * Infomaniak Mail - Android
+ * Copyright (C) 2024 Infomaniak Network SA
+ *
+ * This program 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 program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.infomaniak.lib.core
+
+import android.content.Context
+import androidx.test.core.app.ApplicationProvider
+import com.infomaniak.lib.core.utils.FormatterFileSize.formatShortFileSize
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+import org.robolectric.RobolectricTestRunner
+
+@RunWith(RobolectricTestRunner::class)
+class BasicTest {
+
+   private val context = ApplicationProvider.getApplicationContext<Context>()
+
+    @Test
+    fun hello() {
+        assert(context.formatShortFileSize(900L) == "901 B", )
+    }
+}