diff --git a/app/src/test/java/com/anytypeio/anytype/device/DefaultPushMessageProcessorTest.kt b/app/src/test/java/com/anytypeio/anytype/device/DefaultPushMessageProcessorTest.kt
new file mode 100644
index 0000000000..2929be3b4a
--- /dev/null
+++ b/app/src/test/java/com/anytypeio/anytype/device/DefaultPushMessageProcessorTest.kt
@@ -0,0 +1,123 @@
+package com.anytypeio.anytype.device
+
+import android.os.Build
+import android.util.Base64
+import com.anytypeio.anytype.core_models.DecryptedPushContent
+import com.anytypeio.anytype.presentation.notifications.DecryptionPushContentService
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.kotlin.any
+import org.mockito.kotlin.mock
+import org.mockito.kotlin.verify
+import org.mockito.kotlin.verifyNoInteractions
+import org.mockito.kotlin.whenever
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [Build.VERSION_CODES.P])
+class DefaultPushMessageProcessorTest {
+
+    private lateinit var decryptionService: DecryptionPushContentService
+    private lateinit var notificationBuilder: NotificationBuilder
+    private lateinit var processor: DefaultPushMessageProcessor
+
+    @Before
+    fun setup() {
+        decryptionService = mock()
+        notificationBuilder = mock()
+        processor = DefaultPushMessageProcessor(
+            decryptionService = decryptionService,
+            notificationBuilder = notificationBuilder
+        )
+    }
+
+    @Test
+    fun `process should return false when payload is missing`() {
+        // Given
+        val messageData = mapOf(
+            "x-any-key-id" to "test-key-id"
+        )
+
+        // When
+        val result = processor.process(messageData)
+
+        // Then
+        assertFalse(result)
+        verifyNoInteractions(decryptionService)
+        verifyNoInteractions(notificationBuilder)
+    }
+
+    @Test
+    fun `process should return false when key id is missing`() {
+        // Given
+        val messageData = mapOf(
+            "x-any-payload" to "test-payload"
+        )
+
+        // When
+        val result = processor.process(messageData)
+
+        // Then
+        assertFalse(result)
+        verifyNoInteractions(decryptionService)
+        verifyNoInteractions(notificationBuilder)
+    }
+
+    @Test
+    fun `process should return false when decryption fails`() {
+        // Given
+        val messageData = mapOf(
+            "x-any-payload" to "test-payload",
+            "x-any-key-id" to "test-key-id"
+        )
+        whenever(decryptionService.decrypt(any(), any())).thenReturn(null)
+
+        // When
+        val result = processor.process(messageData)
+
+        // Then
+        assertFalse(result)
+        verifyNoInteractions(notificationBuilder)
+    }
+
+    @Test
+    fun `process should return true and show notification when decryption succeeds`() {
+        // Given
+        val payload = "test-payload"
+        val keyId = "test-key-id"
+        val messageData = mapOf(
+            "x-any-payload" to payload,
+            "x-any-key-id" to keyId
+        )
+        
+        val decryptedContent = DecryptedPushContent(
+            spaceId = "test-space-id",
+            type = 1,
+            senderId = "test-sender-id",
+            newMessage = DecryptedPushContent.Message(
+                chatId = "test-chat-id",
+                msgId = "test-msg-id",
+                text = "Test message",
+                spaceName = "Test Space",
+                senderName = "Test Sender"
+            )
+        )
+
+        whenever(decryptionService.decrypt(Base64.decode(payload, Base64.DEFAULT), keyId))
+            .thenReturn(decryptedContent)
+
+        // When
+        val result = processor.process(messageData)
+
+        // Then
+        assertTrue(result)
+        verify(notificationBuilder).buildAndNotify(
+            message = decryptedContent.newMessage,
+            spaceId = decryptedContent.spaceId
+        )
+    }
+} 
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