diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/timelineobject/TimelineObjectWarnFilter.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/timelineobject/TimelineObjectWarnFilter.kt
index 6950d4e9..bdd0764d 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/timelineobject/TimelineObjectWarnFilter.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/domain/model/timelineobject/TimelineObjectWarnFilter.kt
@@ -2,4 +2,4 @@ package dev.usbharu.hideout.core.domain.model.timelineobject
 
 import dev.usbharu.hideout.core.domain.model.filter.FilterId
 
-class TimelineObjectWarnFilter(val filterId: FilterId, val matchedKeyword: String)
+data class TimelineObjectWarnFilter(val filterId: FilterId, val matchedKeyword: String)
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/other/DefaultPostContentFormatter.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/other/DefaultPostContentFormatter.kt
index c6c02dc5..0998a495 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/other/DefaultPostContentFormatter.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/other/DefaultPostContentFormatter.kt
@@ -43,8 +43,6 @@ class DefaultPostContentFormatter(private val policyFactory: PolicyFactory) : Po
 
         // 文字だけのHTMLなどはここでpタグで囲む
         val flattenHtml = unsafeElement.childNodes().mapNotNull {
-            println(it.toString())
-            println(it.javaClass)
             if (it is Element) {
                 it
             } else if (it is TextNode) {
@@ -59,8 +57,6 @@ class DefaultPostContentFormatter(private val policyFactory: PolicyFactory) : Po
 
         val safeHtml = policyFactory.sanitize(unsafeHtml)
 
-        println(safeHtml)
-
         val safeDocument =
             Jsoup.parseBodyFragment(safeHtml).getElementsByTag("body").first() ?: return FormattedPostContent("", "")
 
@@ -97,6 +93,9 @@ class DefaultPostContentFormatter(private val policyFactory: PolicyFactory) : Po
         }
 
         val elements = Elements(formattedHtml)
+        val document1 = Document("")
+        document1.outputSettings().syntax(Document.OutputSettings.Syntax.xml)
+        document1.insertChildren(0, elements)
 
         return FormattedPostContent(elements.outerHtml().replace("\n", ""), printHtml(elements))
     }
diff --git a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/timeline/AbstractTimelineStore.kt b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/timeline/AbstractTimelineStore.kt
index 38560c81..564f188a 100644
--- a/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/timeline/AbstractTimelineStore.kt
+++ b/hideout-core/src/main/kotlin/dev/usbharu/hideout/core/infrastructure/timeline/AbstractTimelineStore.kt
@@ -263,7 +263,7 @@ abstract class AbstractTimelineStore(private val idGenerateService: IdGenerateSe
         )
     }
 
-    abstract suspend fun getActors(actorIds: List<ActorId>): Map<ActorId, Actor>
+    protected abstract suspend fun getActors(actorIds: List<ActorId>): Map<ActorId, Actor>
 
-    abstract suspend fun getUserDetails(userDetailIdList: List<UserDetailId>): Map<UserDetailId, UserDetail>
+    protected abstract suspend fun getUserDetails(userDetailIdList: List<UserDetailId>): Map<UserDetailId, UserDetail>
 }
diff --git a/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/infrastructure/other/DefaultPostContentFormatterTest.kt b/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/infrastructure/other/DefaultPostContentFormatterTest.kt
index 05ee9f62..91c6413f 100644
--- a/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/infrastructure/other/DefaultPostContentFormatterTest.kt
+++ b/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/infrastructure/other/DefaultPostContentFormatterTest.kt
@@ -1,11 +1,13 @@
 package dev.usbharu.hideout.core.infrastructure.other
 
 import dev.usbharu.hideout.core.config.HtmlSanitizeConfig
+import dev.usbharu.hideout.core.domain.service.post.FormattedPostContent
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.extension.ExtendWith
 import org.mockito.InjectMocks
 import org.mockito.Spy
 import org.mockito.junit.jupiter.MockitoExtension
+import kotlin.test.assertEquals
 
 @ExtendWith(MockitoExtension::class)
 class DefaultPostContentFormatterTest {
@@ -17,40 +19,57 @@ class DefaultPostContentFormatterTest {
 
     @Test
     fun 文字だけのHTMLをPで囲む() {
-        formatter.format("a")
+        val actual = formatter.format("a")
+
+        assertEquals(FormattedPostContent("<p>a</p>", "a"), actual)
     }
 
     @Test
     fun エレメントはそのまま() {
-        formatter.format("<p>a</p>")
+        val actual = formatter.format("<p>a</p>")
+
+        assertEquals(FormattedPostContent("<p>a</p>", "a"), actual)
     }
 
     @Test
     fun コメントは無視() {
-        formatter.format("<!-- aa -->")
+        val actual = formatter.format("<!-- aa -->")
+
+        assertEquals(FormattedPostContent("", ""), actual)
     }
 
     @Test
     fun brタグを改行に() {
-        formatter.format("<p>a<br></p>")
+        val actual = formatter.format("<p>a<br></p>")
+
+        assertEquals(FormattedPostContent("<p>a<br /></p>", "a\n"), actual)
     }
 
     @Test
     fun brタグ2連続を段落に() {
         val format = formatter.format("<p>a<br><br>a</p>")
 
-        println(format)
+        assertEquals(FormattedPostContent("<p>a</p><p>a</p>", "a\n\na"), format)
+    }
+
+    @Test
+    fun brタグ3連続以上を段落にして改行2つに変換() {
+        val format = formatter.format("<p>a<br><br><br>a</p>")
+
+        assertEquals(FormattedPostContent("<p>a</p><p>a</p>", "a\n\na"), format)
     }
 
     @Test
     fun aタグは許可される() {
         val format = formatter.format("<a href=\"https://example.com\">p</a>")
 
-        println(format)
+        assertEquals(FormattedPostContent("<a href=\"https://example.com\">p</a>", "p"), format)
     }
 
     @Test
     fun pの中のaタグも許可される() {
-        formatter.format("<p><a href=\"https://example.com\">a</a></p>")
+        val actual = formatter.format("<p><a href=\"https://example.com\">a</a></p>")
+
+        assertEquals(FormattedPostContent("<p><a href=\"https://example.com\">a</a></p>", "a"), actual)
     }
 }
\ No newline at end of file
diff --git a/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/infrastructure/other/TwitterSnowflakeIdGenerateServiceTest.kt b/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/infrastructure/other/TwitterSnowflakeIdGenerateServiceTest.kt
new file mode 100644
index 00000000..98855ca8
--- /dev/null
+++ b/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/infrastructure/other/TwitterSnowflakeIdGenerateServiceTest.kt
@@ -0,0 +1,30 @@
+package dev.usbharu.hideout.core.infrastructure.other
+
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
+
+class TwitterSnowflakeIdGenerateServiceTest {
+    @Test
+    fun noDuplicateTest() = runBlocking {
+        val mutex = Mutex()
+        val mutableListOf = mutableListOf<Long>()
+        coroutineScope {
+            repeat(500000) {
+                launch(Dispatchers.IO) {
+                    val id = TwitterSnowflakeIdGenerateService.generateId()
+                    mutex.withLock {
+                        mutableListOf.add(id)
+                    }
+                }
+            }
+        }
+
+        assertEquals(0, mutableListOf.size - mutableListOf.toSet().size)
+    }
+}
\ No newline at end of file
diff --git a/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/infrastructure/timeline/DefaultTimelineStoreTest.kt b/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/infrastructure/timeline/DefaultTimelineStoreTest.kt
new file mode 100644
index 00000000..66eeb1a0
--- /dev/null
+++ b/hideout-core/src/test/kotlin/dev/usbharu/hideout/core/infrastructure/timeline/DefaultTimelineStoreTest.kt
@@ -0,0 +1,348 @@
+package dev.usbharu.hideout.core.infrastructure.timeline
+
+import dev.usbharu.hideout.core.config.DefaultTimelineStoreConfig
+import dev.usbharu.hideout.core.domain.model.actor.ActorRepository
+import dev.usbharu.hideout.core.domain.model.filter.*
+import dev.usbharu.hideout.core.domain.model.post.PostRepository
+import dev.usbharu.hideout.core.domain.model.post.TestPostFactory
+import dev.usbharu.hideout.core.domain.model.post.Visibility
+import dev.usbharu.hideout.core.domain.model.timeline.*
+import dev.usbharu.hideout.core.domain.model.timelineobject.TimelineObject
+import dev.usbharu.hideout.core.domain.model.timelineobject.TimelineObjectWarnFilter
+import dev.usbharu.hideout.core.domain.model.timelinerelationship.TimelineRelationship
+import dev.usbharu.hideout.core.domain.model.timelinerelationship.TimelineRelationshipId
+import dev.usbharu.hideout.core.domain.model.timelinerelationship.TimelineRelationshipRepository
+import dev.usbharu.hideout.core.domain.model.timelinerelationship.Visible
+import dev.usbharu.hideout.core.domain.model.userdetails.UserDetailId
+import dev.usbharu.hideout.core.domain.model.userdetails.UserDetailRepository
+import dev.usbharu.hideout.core.domain.service.filter.FilterDomainService
+import dev.usbharu.hideout.core.infrastructure.other.TwitterSnowflakeIdGenerateService
+import kotlinx.coroutines.test.runTest
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.extension.ExtendWith
+import org.mockito.InjectMocks
+import org.mockito.Mock
+import org.mockito.Spy
+import org.mockito.junit.jupiter.MockitoExtension
+import org.mockito.kotlin.*
+
+@ExtendWith(MockitoExtension::class)
+class DefaultTimelineStoreTest {
+    @InjectMocks
+    lateinit var timelineStore: DefaultTimelineStore
+
+    @Mock
+    lateinit var timelineRepository: TimelineRepository
+
+    @Mock
+    lateinit var timelineRelationshipRepository: TimelineRelationshipRepository
+
+    @Mock
+    lateinit var filterRepository: FilterRepository
+
+    @Mock
+    lateinit var postRepository: PostRepository
+
+    @Mock
+    lateinit var filterDomainService: FilterDomainService
+
+    @Mock
+    lateinit var internalTimelineObjectRepository: InternalTimelineObjectRepository
+
+    @Mock
+    lateinit var userDetailRepository: UserDetailRepository
+
+    @Mock
+    lateinit var actorRepository: ActorRepository
+
+    @Spy
+    val defaultTimelineStoreConfig = DefaultTimelineStoreConfig(500)
+
+    @Spy
+    val idGenerateService = TwitterSnowflakeIdGenerateService
+
+    @Test
+    fun addPost() = runTest {
+        val post = TestPostFactory.create()
+        whenever(timelineRelationshipRepository.findByActorId(post.actorId)).doReturn(
+            listOf(
+                TimelineRelationship(
+                    TimelineRelationshipId(1),
+                    TimelineId(12),
+                    post.actorId,
+                    Visible.PUBLIC
+                )
+            )
+        )
+
+        whenever(timelineRepository.findByIds(listOf(TimelineId(12)))).doReturn(
+            listOf(
+                Timeline(
+                    id = TimelineId(12),
+                    userDetailId = UserDetailId(post.actorId.id),
+                    name = TimelineName("timeline"),
+                    visibility = TimelineVisibility.PUBLIC,
+                    isSystem = false
+                )
+            )
+        )
+
+        val filters = listOf(
+            Filter(
+                id = FilterId(13),
+                userDetailId = UserDetailId(post.actorId.id),
+                name = FilterName("filter"),
+                filterContext = setOf(FilterContext.HOME),
+                filterAction = FilterAction.HIDE,
+                filterKeywords = setOf(
+                    FilterKeyword(FilterKeywordId(14), FilterKeywordKeyword("aa"), FilterMode.NONE)
+                )
+            )
+        )
+
+        whenever(filterRepository.findByUserDetailId(UserDetailId(post.actorId.id))).doReturn(filters)
+
+        whenever(filterDomainService.apply(post, FilterContext.HOME, filters)).doReturn(
+            FilteredPost(
+                post, listOf(
+                    FilterResult(filters.first(), "aaa")
+                )
+            )
+        )
+
+        timelineStore.addPost(post)
+
+        argumentCaptor<List<TimelineObject>> {
+            verify(internalTimelineObjectRepository, times(1)).saveAll(capture())
+            val timelineObjectList = allValues.first()
+
+            assertThat(timelineObjectList).allSatisfy {
+                assertThat(it.postId).isEqualTo(post.id)
+                assertThat(it.postActorId).isEqualTo(post.actorId)
+                assertThat(it.replyId).isNull()
+                assertThat(it.replyActorId).isNull()
+                assertThat(it.repostId).isNull()
+                assertThat(it.repostActorId).isNull()
+
+                assertThat(it.userDetailId).isEqualTo(UserDetailId(post.actorId.id))
+                assertThat(it.timelineId).isEqualTo(TimelineId(12))
+                assertThat(it.warnFilters).contains(TimelineObjectWarnFilter(FilterId(13), "aaa"))
+            }
+        }
+    }
+
+    @Test
+    fun `addPost direct投稿は追加されない`() = runTest {
+        val post = TestPostFactory.create(visibility = Visibility.DIRECT)
+        whenever(timelineRelationshipRepository.findByActorId(post.actorId)).doReturn(
+            listOf(
+                TimelineRelationship(
+                    TimelineRelationshipId(1),
+                    TimelineId(12),
+                    post.actorId,
+                    Visible.PUBLIC
+                )
+            )
+        )
+
+        whenever(timelineRepository.findByIds(listOf(TimelineId(12)))).doReturn(
+            listOf(
+                Timeline(
+                    id = TimelineId(12),
+                    userDetailId = UserDetailId(post.actorId.id),
+                    name = TimelineName("timeline"),
+                    visibility = TimelineVisibility.PUBLIC,
+                    isSystem = false
+                )
+            )
+        )
+
+        timelineStore.addPost(post)
+
+        argumentCaptor<List<TimelineObject>> {
+            verify(internalTimelineObjectRepository, times(1)).saveAll(capture())
+            val timelineObjectList = allValues.first()
+
+            assertThat(timelineObjectList).isEmpty()
+        }
+    }
+
+    @Test
+    fun timelineがpublicでpostがUNLISTEDの時追加されない() = runTest {
+        val post = TestPostFactory.create(visibility = Visibility.UNLISTED)
+        whenever(timelineRelationshipRepository.findByActorId(post.actorId)).doReturn(
+            listOf(
+                TimelineRelationship(
+                    TimelineRelationshipId(1),
+                    TimelineId(12),
+                    post.actorId,
+                    Visible.PUBLIC
+                )
+            )
+        )
+
+        whenever(timelineRepository.findByIds(listOf(TimelineId(12)))).doReturn(
+            listOf(
+                Timeline(
+                    id = TimelineId(12),
+                    userDetailId = UserDetailId(post.actorId.id),
+                    name = TimelineName("timeline"),
+                    visibility = TimelineVisibility.PUBLIC,
+                    isSystem = false
+                )
+            )
+        )
+
+        timelineStore.addPost(post)
+
+        argumentCaptor<List<TimelineObject>> {
+            verify(internalTimelineObjectRepository, times(1)).saveAll(capture())
+            val timelineObjectList = allValues.first()
+
+            assertThat(timelineObjectList).isEmpty()
+        }
+    }
+
+    @Test
+    fun timelineがpublicでpostがFOLLOWERSの時追加されない() = runTest {
+        val post = TestPostFactory.create(visibility = Visibility.FOLLOWERS)
+        whenever(timelineRelationshipRepository.findByActorId(post.actorId)).doReturn(
+            listOf(
+                TimelineRelationship(
+                    TimelineRelationshipId(1),
+                    TimelineId(12),
+                    post.actorId,
+                    Visible.PUBLIC
+                )
+            )
+        )
+
+        whenever(timelineRepository.findByIds(listOf(TimelineId(12)))).doReturn(
+            listOf(
+                Timeline(
+                    id = TimelineId(12),
+                    userDetailId = UserDetailId(post.actorId.id),
+                    name = TimelineName("timeline"),
+                    visibility = TimelineVisibility.PUBLIC,
+                    isSystem = false
+                )
+            )
+        )
+
+        timelineStore.addPost(post)
+
+        argumentCaptor<List<TimelineObject>> {
+            verify(internalTimelineObjectRepository, times(1)).saveAll(capture())
+            val timelineObjectList = allValues.first()
+
+            assertThat(timelineObjectList).isEmpty()
+        }
+    }
+
+    @Test
+    fun timelineがUNLISTEDでpostがFOLLOWERSの時追加されない() = runTest {
+        val post = TestPostFactory.create(visibility = Visibility.FOLLOWERS)
+        whenever(timelineRelationshipRepository.findByActorId(post.actorId)).doReturn(
+            listOf(
+                TimelineRelationship(
+                    TimelineRelationshipId(1),
+                    TimelineId(12),
+                    post.actorId,
+                    Visible.PUBLIC
+                )
+            )
+        )
+
+        whenever(timelineRepository.findByIds(listOf(TimelineId(12)))).doReturn(
+            listOf(
+                Timeline(
+                    id = TimelineId(12),
+                    userDetailId = UserDetailId(post.actorId.id),
+                    name = TimelineName("timeline"),
+                    visibility = TimelineVisibility.UNLISTED,
+                    isSystem = false
+                )
+            )
+        )
+
+        timelineStore.addPost(post)
+
+        argumentCaptor<List<TimelineObject>> {
+            verify(internalTimelineObjectRepository, times(1)).saveAll(capture())
+            val timelineObjectList = allValues.first()
+
+            assertThat(timelineObjectList).isEmpty()
+        }
+    }
+
+    @Test
+    fun timelineがPRIVATEでpostがFOLLOWERSの時追加される() = runTest {
+        val post = TestPostFactory.create(visibility = Visibility.FOLLOWERS)
+        whenever(timelineRelationshipRepository.findByActorId(post.actorId)).doReturn(
+            listOf(
+                TimelineRelationship(
+                    TimelineRelationshipId(1),
+                    TimelineId(12),
+                    post.actorId,
+                    Visible.PUBLIC
+                )
+            )
+        )
+
+        whenever(timelineRepository.findByIds(listOf(TimelineId(12)))).doReturn(
+            listOf(
+                Timeline(
+                    id = TimelineId(12),
+                    userDetailId = UserDetailId(post.actorId.id),
+                    name = TimelineName("timeline"),
+                    visibility = TimelineVisibility.PRIVATE,
+                    isSystem = false
+                )
+            )
+        )
+
+        val filters = listOf(
+            Filter(
+                id = FilterId(13),
+                userDetailId = UserDetailId(post.actorId.id),
+                name = FilterName("filter"),
+                filterContext = setOf(FilterContext.HOME),
+                filterAction = FilterAction.HIDE,
+                filterKeywords = setOf(
+                    FilterKeyword(FilterKeywordId(14), FilterKeywordKeyword("aa"), FilterMode.NONE)
+                )
+            )
+        )
+
+        whenever(filterRepository.findByUserDetailId(UserDetailId(post.actorId.id))).doReturn(filters)
+
+        whenever(filterDomainService.apply(post, FilterContext.HOME, filters)).doReturn(
+            FilteredPost(
+                post, listOf(
+                    FilterResult(filters.first(), "aaa")
+                )
+            )
+        )
+
+        timelineStore.addPost(post)
+
+        argumentCaptor<List<TimelineObject>> {
+            verify(internalTimelineObjectRepository, times(1)).saveAll(capture())
+            val timelineObjectList = allValues.first()
+
+            assertThat(timelineObjectList).allSatisfy {
+                assertThat(it.postId).isEqualTo(post.id)
+                assertThat(it.postActorId).isEqualTo(post.actorId)
+                assertThat(it.replyId).isNull()
+                assertThat(it.replyActorId).isNull()
+                assertThat(it.repostId).isNull()
+                assertThat(it.repostActorId).isNull()
+
+                assertThat(it.userDetailId).isEqualTo(UserDetailId(post.actorId.id))
+                assertThat(it.timelineId).isEqualTo(TimelineId(12))
+                assertThat(it.warnFilters).contains(TimelineObjectWarnFilter(FilterId(13), "aaa"))
+            }
+        }
+    }
+}
\ No newline at end of file