diff --git a/TelegramBotAPI-core/src/commonTest/kotlin/com/github/insanusmokrassar/TelegramBotAPI/SimpleInputFilesTest.kt b/TelegramBotAPI-core/src/commonTest/kotlin/com/github/insanusmokrassar/TelegramBotAPI/SimpleInputFilesTest.kt
index 2661866c83..ef50f0afbf 100644
--- a/TelegramBotAPI-core/src/commonTest/kotlin/com/github/insanusmokrassar/TelegramBotAPI/SimpleInputFilesTest.kt
+++ b/TelegramBotAPI-core/src/commonTest/kotlin/com/github/insanusmokrassar/TelegramBotAPI/SimpleInputFilesTest.kt
@@ -1,11 +1,19 @@
 package com.github.insanusmokrassar.TelegramBotAPI
 
 import com.github.insanusmokrassar.TelegramBotAPI.requests.abstracts.toInputFile
-import com.github.insanusmokrassar.TelegramBotAPI.types.files.Photo
+import com.github.insanusmokrassar.TelegramBotAPI.types.InputMedia.MediaGroupMemberInputMediaSerializer
 import com.github.insanusmokrassar.TelegramBotAPI.types.files.PhotoSize
 import com.github.insanusmokrassar.TelegramBotAPI.types.message.content.media.PhotoContent
+import kotlinx.serialization.json.Json
 import kotlin.test.Test
 
+private val nonstrictJsonFormat = Json {
+    isLenient = true
+    ignoreUnknownKeys = true
+    allowSpecialFloatingPointValues = true
+    useArrayPolymorphism = true
+}
+
 class SimpleInputFilesTest {
     @Test
     fun test_that_creating_of_photo_and_converting_to_input_media_working_correctly() {
@@ -14,6 +22,9 @@ class SimpleInputFilesTest {
                 PhotoSize("example_file_id".toInputFile(), "example_unique_file_id", 100, 100, 100)
             )
         )
-        photoContent.toMediaGroupMemberInputMedia()
+        nonstrictJsonFormat.encodeToString(
+            MediaGroupMemberInputMediaSerializer,
+            photoContent.toMediaGroupMemberInputMedia()
+        )
     }
 }