diff --git a/posthog-android/src/main/java/com/posthog/android/internal/PostHogSharedPreferences.kt b/posthog-android/src/main/java/com/posthog/android/internal/PostHogSharedPreferences.kt
index f9223b50..380d2888 100644
--- a/posthog-android/src/main/java/com/posthog/android/internal/PostHogSharedPreferences.kt
+++ b/posthog-android/src/main/java/com/posthog/android/internal/PostHogSharedPreferences.kt
@@ -2,14 +2,25 @@ package com.posthog.android.internal
 
 import android.content.Context
 import android.content.Context.MODE_PRIVATE
+import android.content.SharedPreferences
 import com.posthog.PostHogPreferences
+import com.posthog.PostHogVisibleForTesting
 import com.posthog.android.PostHogAndroidConfig
 
-internal class PostHogSharedPreferences(context: Context, config: PostHogAndroidConfig) :
+/**
+ * Reads and writes to the SDKs shared preferences
+ * The shared pref is called "posthog-android-$apiKey"
+ * @property context the App Context
+ * @property config the Config
+ */
+internal class PostHogSharedPreferences(
+    private val context: Context,
+    private val config: PostHogAndroidConfig,
+    @PostHogVisibleForTesting
+    private val sharedPreferences: SharedPreferences = context.getSharedPreferences("posthog-android-${config.apiKey}", MODE_PRIVATE),
+) :
     PostHogPreferences {
 
-    private val sharedPreferences = context.getSharedPreferences("posthog-android-${config.apiKey}", MODE_PRIVATE)
-
     private val lock = Any()
 
     override fun getValue(key: String, defaultValue: Any?): Any? {
@@ -44,11 +55,23 @@ internal class PostHogSharedPreferences(context: Context, config: PostHogAndroid
                 is Int -> {
                     edit.putInt(key, value)
                 }
-                is Set<*> -> {
+                is Collection<*> -> {
+                    @Suppress("UNCHECKED_CAST")
+                    (value.toSet() as? Set<String>)?.let {
+                        edit.putStringSet(key, it)
+                    } ?: run {
+                        config.logger.log("Value type: ${value.javaClass.name} and value: $value isn't valid.")
+                    }
+                }
+                is Array<*> -> {
                     @Suppress("UNCHECKED_CAST")
-                    (value as? Set<String>)?.let {
+                    (value.toSet() as? Set<String>)?.let {
                         edit.putStringSet(key, it)
+                    } ?: run {
+                        config.logger.log("Value type: ${value.javaClass.name} and value: $value isn't valid.")
                     }
+                } else -> {
+                    config.logger.log("Value type: ${value.javaClass.name} and value: $value isn't valid.")
                 }
             }
 
diff --git a/posthog-android/src/test/java/com/posthog/android/FakeSharedPreferences.kt b/posthog-android/src/test/java/com/posthog/android/FakeSharedPreferences.kt
new file mode 100644
index 00000000..2c6986e6
--- /dev/null
+++ b/posthog-android/src/test/java/com/posthog/android/FakeSharedPreferences.kt
@@ -0,0 +1,51 @@
+package com.posthog.android
+
+import android.content.SharedPreferences
+
+internal class FakeSharedPreferences : SharedPreferences {
+    private val preferences = mutableMapOf<String, Any?>()
+    override fun getAll(): MutableMap<String, *> {
+        return preferences
+    }
+
+    override fun getString(key: String, defValue: String?): String? {
+        return preferences[key] as? String ?: defValue
+    }
+
+    override fun getStringSet(key: String, defValues: MutableSet<String>?): MutableSet<String>? {
+        @Suppress("UNCHECKED_CAST")
+        return preferences[key] as? MutableSet<String> ?: defValues
+    }
+
+    override fun getInt(key: String, defValue: Int): Int {
+        return preferences[key] as? Int ?: defValue
+    }
+
+    override fun getLong(key: String, defValue: Long): Long {
+        return preferences[key] as? Long ?: defValue
+    }
+
+    override fun getFloat(key: String, defValue: Float): Float {
+        return preferences[key] as? Float ?: defValue
+    }
+
+    override fun getBoolean(key: String, defValue: Boolean): Boolean {
+        return preferences[key] as? Boolean ?: defValue
+    }
+
+    override fun contains(key: String): Boolean {
+        return preferences.contains(key)
+    }
+
+    override fun edit(): SharedPreferences.Editor {
+        return FakeSharedPreferencesEditor(preferences)
+    }
+
+    override fun registerOnSharedPreferenceChangeListener(listener: SharedPreferences.OnSharedPreferenceChangeListener?) {
+        TODO("Not yet implemented")
+    }
+
+    override fun unregisterOnSharedPreferenceChangeListener(listener: SharedPreferences.OnSharedPreferenceChangeListener?) {
+        TODO("Not yet implemented")
+    }
+}
diff --git a/posthog-android/src/test/java/com/posthog/android/FakeSharedPreferencesEditor.kt b/posthog-android/src/test/java/com/posthog/android/FakeSharedPreferencesEditor.kt
new file mode 100644
index 00000000..c0e08b8d
--- /dev/null
+++ b/posthog-android/src/test/java/com/posthog/android/FakeSharedPreferencesEditor.kt
@@ -0,0 +1,52 @@
+package com.posthog.android
+
+import android.content.SharedPreferences
+
+internal class FakeSharedPreferencesEditor(private val preferences: MutableMap<String, Any?>) : SharedPreferences.Editor {
+    override fun putString(key: String, value: String?): SharedPreferences.Editor {
+        preferences[key] = value
+        return this
+    }
+
+    override fun putStringSet(key: String, values: MutableSet<String>?): SharedPreferences.Editor {
+        preferences[key] = values
+        return this
+    }
+
+    override fun putInt(key: String, value: Int): SharedPreferences.Editor {
+        preferences[key] = value
+        return this
+    }
+
+    override fun putLong(key: String, value: Long): SharedPreferences.Editor {
+        preferences[key] = value
+        return this
+    }
+
+    override fun putFloat(key: String, value: Float): SharedPreferences.Editor {
+        preferences[key] = value
+        return this
+    }
+
+    override fun putBoolean(key: String, value: Boolean): SharedPreferences.Editor {
+        preferences[key] = value
+        return this
+    }
+
+    override fun remove(key: String): SharedPreferences.Editor {
+        preferences.remove(key)
+        return this
+    }
+
+    override fun clear(): SharedPreferences.Editor {
+        preferences.clear()
+        return this
+    }
+
+    override fun commit(): Boolean {
+        return true
+    }
+
+    override fun apply() {
+    }
+}
diff --git a/posthog-android/src/test/java/com/posthog/android/Utils.kt b/posthog-android/src/test/java/com/posthog/android/Utils.kt
index c4558ae9..d502b959 100644
--- a/posthog-android/src/test/java/com/posthog/android/Utils.kt
+++ b/posthog-android/src/test/java/com/posthog/android/Utils.kt
@@ -41,10 +41,10 @@ public fun mockScreenTitle(throws: Boolean): Activity {
 }
 
 @Suppress("DEPRECATION")
-public fun mockPackageInfo(context: Context, name: String = "1.0.0", code: Int = 1) {
+public fun Context.mockPackageInfo(name: String = "1.0.0", code: Int = 1) {
     val pm = mock<PackageManager>()
-    whenever(context.packageManager).thenReturn(pm)
-    whenever(context.packageName).thenReturn("test")
+    whenever(packageManager).thenReturn(pm)
+    whenever(packageName).thenReturn("test")
     val pi = PackageInfo()
     pi.versionName = name
     pi.versionCode = code
diff --git a/posthog-android/src/test/java/com/posthog/android/internal/PostHogAppInstallIntegrationTest.kt b/posthog-android/src/test/java/com/posthog/android/internal/PostHogAppInstallIntegrationTest.kt
index 412727d9..aa8d1beb 100644
--- a/posthog-android/src/test/java/com/posthog/android/internal/PostHogAppInstallIntegrationTest.kt
+++ b/posthog-android/src/test/java/com/posthog/android/internal/PostHogAppInstallIntegrationTest.kt
@@ -35,7 +35,7 @@ internal class PostHogAppInstallIntegrationTest {
     fun `install captures app installed`() {
         val sut = getSut()
 
-        mockPackageInfo(context, "1.0.0", 1)
+        context.mockPackageInfo("1.0.0", 1)
 
         val fake = createPostHogFake()
 
@@ -50,13 +50,13 @@ internal class PostHogAppInstallIntegrationTest {
     fun `install captures app updated`() {
         val sut = getSut()
 
-        mockPackageInfo(context, "1.0.0", 1)
+        context.mockPackageInfo("1.0.0", 1)
 
         val fake = createPostHogFake()
 
         sut.install()
 
-        mockPackageInfo(context, "2.0.0", 2)
+        context.mockPackageInfo("2.0.0", 2)
 
         sut.install()
 
@@ -71,7 +71,7 @@ internal class PostHogAppInstallIntegrationTest {
     fun `install does not capture if not installed or updated`() {
         val sut = getSut()
 
-        mockPackageInfo(context, "1.0.0", 1)
+        context.mockPackageInfo("1.0.0", 1)
 
         val fake = createPostHogFake()
 
diff --git a/posthog-android/src/test/java/com/posthog/android/internal/PostHogLifecycleObserverIntegrationTest.kt b/posthog-android/src/test/java/com/posthog/android/internal/PostHogLifecycleObserverIntegrationTest.kt
index 5b4e1f6c..22386c8a 100644
--- a/posthog-android/src/test/java/com/posthog/android/internal/PostHogLifecycleObserverIntegrationTest.kt
+++ b/posthog-android/src/test/java/com/posthog/android/internal/PostHogLifecycleObserverIntegrationTest.kt
@@ -55,7 +55,7 @@ internal class PostHogLifecycleObserverIntegrationTest {
         val sut = getSut()
 
         val fake = createPostHogFake()
-        mockPackageInfo(context, "1.0.0", 1)
+        context.mockPackageInfo("1.0.0", 1)
 
         sut.onStart(ProcessLifecycleOwner.get())
 
@@ -70,7 +70,7 @@ internal class PostHogLifecycleObserverIntegrationTest {
         val sut = getSut()
 
         val fake = createPostHogFake()
-        mockPackageInfo(context, "1.0.0", 1)
+        context.mockPackageInfo("1.0.0", 1)
 
         sut.onStart(ProcessLifecycleOwner.get())
         sut.onStart(ProcessLifecycleOwner.get())
diff --git a/posthog-android/src/test/java/com/posthog/android/internal/PostHogSharedPreferencesTests.kt b/posthog-android/src/test/java/com/posthog/android/internal/PostHogSharedPreferencesTests.kt
new file mode 100644
index 00000000..24303a87
--- /dev/null
+++ b/posthog-android/src/test/java/com/posthog/android/internal/PostHogSharedPreferencesTests.kt
@@ -0,0 +1,148 @@
+package com.posthog.android.internal
+
+import android.content.Context
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.posthog.android.FakeSharedPreferences
+import com.posthog.android.PostHogAndroidConfig
+import com.posthog.android.apiKey
+import org.junit.runner.RunWith
+import org.mockito.kotlin.mock
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertNull
+import kotlin.test.assertTrue
+
+@RunWith(AndroidJUnit4::class)
+internal class PostHogSharedPreferencesTests {
+    private val context = mock<Context>()
+
+    private fun getSut(): PostHogSharedPreferences {
+        val config = PostHogAndroidConfig(apiKey)
+        return PostHogSharedPreferences(context, config, sharedPreferences = FakeSharedPreferences())
+    }
+
+    @Test
+    fun `preferences set string`() {
+        val sut = getSut()
+
+        sut.setValue("key", "value")
+
+        assertEquals("value", sut.getValue("key"))
+    }
+
+    @Test
+    fun `preferences set boolean`() {
+        val sut = getSut()
+
+        sut.setValue("key", true)
+
+        assertTrue(sut.getValue("key") as Boolean)
+    }
+
+    @Test
+    fun `preferences set float`() {
+        val sut = getSut()
+
+        sut.setValue("key", 1f)
+
+        assertEquals(1f, sut.getValue("key"))
+    }
+
+    @Test
+    fun `preferences set long`() {
+        val sut = getSut()
+
+        sut.setValue("key", 1L)
+
+        assertEquals(1L, sut.getValue("key"))
+    }
+
+    @Test
+    fun `preferences set int`() {
+        val sut = getSut()
+
+        sut.setValue("key", 1)
+
+        assertEquals(1, sut.getValue("key"))
+    }
+
+    @Test
+    fun `preferences set string set`() {
+        val sut = getSut()
+
+        sut.setValue("key", setOf("1", "2"))
+
+        assertEquals(setOf("1", "2"), sut.getValue("key"))
+    }
+
+    @Test
+    fun `preferences set string list`() {
+        val sut = getSut()
+
+        sut.setValue("key", listOf("1", "2"))
+
+        assertEquals(setOf("1", "2"), sut.getValue("key"))
+    }
+
+    @Test
+    fun `preferences set string array`() {
+        val sut = getSut()
+
+        sut.setValue("key", arrayOf("1", "2"))
+
+        assertEquals(setOf("1", "2"), sut.getValue("key"))
+    }
+
+    @Test
+    fun `preferences does not set a non valid type`() {
+        val sut = getSut()
+
+        sut.setValue("key", Any())
+
+        assertNull(sut.getValue("key"))
+    }
+
+    @Test
+    fun `preferences clear all values`() {
+        val sut = getSut()
+
+        sut.setValue("key", "1")
+        sut.clear(listOf())
+
+        assertTrue(sut.getAll().isEmpty())
+    }
+
+    @Test
+    fun `preferences clear all values but exceptions`() {
+        val sut = getSut()
+
+        sut.setValue("key", "1")
+        sut.setValue("somethingElse", "1")
+        sut.clear(listOf("key"))
+
+        assertEquals("1", sut.getValue("key"))
+        assertEquals(1, sut.getAll().size)
+    }
+
+    @Test
+    fun `preferences removes item`() {
+        val sut = getSut()
+
+        sut.setValue("key", "value")
+        sut.remove("key")
+
+        assertNull(sut.getValue("key"))
+    }
+
+    @Test
+    fun `preferences returns all items`() {
+        val sut = getSut()
+
+        sut.setValue("key", "value")
+        sut.setValue("somethingElse", "value")
+
+        assertEquals("value", sut.getValue("key") as String)
+        assertEquals("value", sut.getValue("somethingElse") as String)
+        assertEquals(2, sut.getAll().size)
+    }
+}