diff --git a/src/test/kotlin/dev/usbharu/hideout/core/service/post/PostServiceImplTest.kt b/src/test/kotlin/dev/usbharu/hideout/core/service/post/PostServiceImplTest.kt
new file mode 100644
index 00000000..e9d17e68
--- /dev/null
+++ b/src/test/kotlin/dev/usbharu/hideout/core/service/post/PostServiceImplTest.kt
@@ -0,0 +1,144 @@
+package dev.usbharu.hideout.core.service.post
+
+import dev.usbharu.hideout.activitypub.service.activity.create.ApSendCreateService
+import dev.usbharu.hideout.application.config.CharacterLimit
+import dev.usbharu.hideout.core.domain.model.post.Post
+import dev.usbharu.hideout.core.domain.model.post.PostRepository
+import dev.usbharu.hideout.core.domain.model.user.UserRepository
+import dev.usbharu.hideout.core.query.PostQueryService
+import dev.usbharu.hideout.core.service.timeline.TimelineService
+import kotlinx.coroutines.test.runTest
+import org.assertj.core.api.Assertions.assertThat
+import org.jetbrains.exposed.exceptions.ExposedSQLException
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.extension.ExtendWith
+import org.mockito.InjectMocks
+import org.mockito.Mock
+import org.mockito.Mockito
+import org.mockito.Mockito.mockStatic
+import org.mockito.Spy
+import org.mockito.junit.jupiter.MockitoExtension
+import org.mockito.kotlin.*
+import org.springframework.dao.DuplicateKeyException
+import utils.PostBuilder
+import utils.UserBuilder
+import java.time.Instant
+
+@ExtendWith(MockitoExtension::class)
+class PostServiceImplTest {
+
+    @Mock
+    private lateinit var postRepository: PostRepository
+
+    @Mock
+    private lateinit var userRepository: UserRepository
+
+    @Mock
+    private lateinit var timelineService: TimelineService
+
+    @Mock
+    private lateinit var postQueryService: PostQueryService
+
+    @Spy
+    private var postBuilder: Post.PostBuilder = Post.PostBuilder(CharacterLimit())
+
+    @Mock
+    private lateinit var apSendCreateService: ApSendCreateService
+
+    @InjectMocks
+    private lateinit var postServiceImpl: PostServiceImpl
+
+    @Test
+    fun `createLocal 正常にpostを作成できる`() = runTest {
+
+        val now = Instant.now()
+        val post = PostBuilder.of(createdAt = now.toEpochMilli())
+
+        whenever(postRepository.save(eq(post))).doReturn(true)
+        whenever(postRepository.generateId()).doReturn(post.id)
+        whenever(userRepository.findById(eq(post.userId))).doReturn(UserBuilder.localUserOf(id = post.userId))
+        whenever(timelineService.publishTimeline(eq(post), eq(true))).doReturn(Unit)
+
+        mockStatic(Instant::class.java, Mockito.CALLS_REAL_METHODS).use {
+
+            it.`when`<Instant>(Instant::now).doReturn(now)
+            val createLocal = postServiceImpl.createLocal(
+                PostCreateDto(
+                    post.text,
+                    post.overview,
+                    post.visibility,
+                    post.repostId,
+                    post.replyId,
+                    post.userId,
+                    post.mediaIds
+                )
+            )
+
+            assertThat(createLocal).isEqualTo(post)
+        }
+
+        verify(postRepository, times(1)).save(eq(post))
+        verify(timelineService, times(1)).publishTimeline(eq(post), eq(true))
+        verify(apSendCreateService, times(1)).createNote(eq(post))
+    }
+
+    @Test
+    fun `createRemote 正常にリモートのpostを作成できる`() = runTest {
+        val post = PostBuilder.of()
+
+        whenever(postRepository.save(eq(post))).doReturn(true)
+        whenever(timelineService.publishTimeline(eq(post), eq(false))).doReturn(Unit)
+
+        val createLocal = postServiceImpl.createRemote(post)
+
+        assertThat(createLocal).isEqualTo(post)
+
+
+        verify(postRepository, times(1)).save(eq(post))
+        verify(timelineService, times(1)).publishTimeline(eq(post), eq(false))
+    }
+
+    @Test
+    fun `createRemote 既に作成されていた場合はそのまま帰す`() = runTest {
+        val post = PostBuilder.of()
+
+        whenever(postRepository.save(eq(post))).doReturn(false)
+
+        val createLocal = postServiceImpl.createRemote(post)
+
+        assertThat(createLocal).isEqualTo(post)
+
+        verify(postRepository, times(1)).save(eq(post))
+        verify(timelineService, times(0)).publishTimeline(any(), any())
+    }
+
+    @Test
+    fun `createRemote 既に作成されていることを検知できず例外が発生した場合はDBから取得して返す`() = runTest {
+        val post = PostBuilder.of()
+
+        whenever(postRepository.save(eq(post))).doAnswer { throw ExposedSQLException(null, emptyList(), mock()) }
+        whenever(postQueryService.findByApId(eq(post.apId))).doReturn(post)
+
+        val createLocal = postServiceImpl.createRemote(post)
+
+        assertThat(createLocal).isEqualTo(post)
+
+        verify(postRepository, times(1)).save(eq(post))
+        verify(timelineService, times(0)).publishTimeline(any(), any())
+    }
+
+    @Test
+    fun `createRemote 既に作成されていることを検知出来ずタイムラインにpush出来なかった場合何もしない`() = runTest {
+        val post = PostBuilder.of()
+
+        whenever(postRepository.save(eq(post))).doReturn(true)
+        whenever(timelineService.publishTimeline(eq(post), eq(false))).doThrow(DuplicateKeyException::class)
+
+        val createLocal = postServiceImpl.createRemote(post)
+
+        assertThat(createLocal).isEqualTo(post)
+
+        verify(postRepository, times(1)).save(eq(post))
+        verify(timelineService, times(1)).publishTimeline(eq(post), eq(false))
+    }
+}
diff --git a/src/test/kotlin/utils/UserBuilder.kt b/src/test/kotlin/utils/UserBuilder.kt
index 3674ac7e..b62a3cb5 100644
--- a/src/test/kotlin/utils/UserBuilder.kt
+++ b/src/test/kotlin/utils/UserBuilder.kt
@@ -20,15 +20,15 @@ object UserBuilder {
         screenName: String = name,
         description: String = "This user is test user.",
         password: String = "password-$id",
-        inbox: String = "https://$domain/$id/inbox",
-        outbox: String = "https://$domain/$id/outbox",
-        url: String = "https://$domain/$id/",
+        inbox: String = "https://$domain/users/$id/inbox",
+        outbox: String = "https://$domain/users/$id/outbox",
+        url: String = "https://$domain/users/$id",
         publicKey: String = "-----BEGIN PUBLIC KEY-----...-----END PUBLIC KEY-----",
         privateKey: String = "-----BEGIN PRIVATE KEY-----...-----END PRIVATE KEY-----",
         createdAt: Instant = Instant.now(),
-        keyId: String = "https://$domain/$id#pubkey",
-        followers: String = "https://$domain/$id/followers",
-        following: String = "https://$domain/$id/following"
+        keyId: String = "https://$domain/users/$id#pubkey",
+        followers: String = "https://$domain/users/$id/followers",
+        following: String = "https://$domain/users/$id/following"
     ): User {
         return userBuilder.of(
             id = id,