diff --git a/src/test/kotlin/dev/usbharu/hideout/activitypub/interfaces/api/inbox/InboxControllerImplTest.kt b/src/test/kotlin/dev/usbharu/hideout/activitypub/interfaces/api/inbox/InboxControllerImplTest.kt
new file mode 100644
index 00000000..75d76521
--- /dev/null
+++ b/src/test/kotlin/dev/usbharu/hideout/activitypub/interfaces/api/inbox/InboxControllerImplTest.kt
@@ -0,0 +1,104 @@
+package dev.usbharu.hideout.activitypub.interfaces.api.inbox
+
+import dev.usbharu.hideout.activitypub.domain.exception.JsonParseException
+import dev.usbharu.hideout.activitypub.interfaces.api.common.ActivityPubStringResponse
+import dev.usbharu.hideout.activitypub.service.common.APService
+import dev.usbharu.hideout.activitypub.service.common.ActivityType
+import dev.usbharu.hideout.core.domain.exception.FailedToGetResourcesException
+import io.ktor.http.*
+import kotlinx.coroutines.test.runTest
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.extension.ExtendWith
+import org.mockito.InjectMocks
+import org.mockito.Mock
+import org.mockito.junit.jupiter.MockitoExtension
+import org.mockito.kotlin.doReturn
+import org.mockito.kotlin.doThrow
+import org.mockito.kotlin.eq
+import org.mockito.kotlin.whenever
+import org.springframework.http.MediaType
+import org.springframework.test.web.servlet.MockMvc
+import org.springframework.test.web.servlet.post
+import org.springframework.test.web.servlet.setup.MockMvcBuilders
+
+@ExtendWith(MockitoExtension::class)
+class InboxControllerImplTest {
+
+    private lateinit var mockMvc: MockMvc
+
+    @Mock
+    private lateinit var apService: APService
+
+    @InjectMocks
+    private lateinit var inboxController: InboxControllerImpl
+
+    @BeforeEach
+    fun setUp() {
+        mockMvc = MockMvcBuilders.standaloneSetup(inboxController).build()
+    }
+
+    @Test
+    fun `inbox 正常なPOSTリクエストをしたときAcceptが返ってくる`() = runTest {
+
+
+        val json = """{"type":"Follow"}"""
+        whenever(apService.parseActivity(eq(json))).doReturn(ActivityType.Follow)
+        whenever(apService.processActivity(eq(json), eq(ActivityType.Follow))).doReturn(
+            ActivityPubStringResponse(
+                HttpStatusCode.Accepted, ""
+            )
+        )
+
+        mockMvc
+            .post("/inbox") {
+                content = json
+                contentType = MediaType.APPLICATION_JSON
+            }
+            .asyncDispatch()
+            .andExpect {
+                status { isAccepted() }
+            }
+
+    }
+
+    @Test
+    fun `inbox parseActivityに失敗したときAcceptが返ってくる`() = runTest {
+        val json = """{"type":"Hoge"}"""
+        whenever(apService.parseActivity(eq(json))).doThrow(JsonParseException::class)
+
+        mockMvc
+            .post("/inbox") {
+                content = json
+                contentType = MediaType.APPLICATION_JSON
+            }
+            .asyncDispatch()
+            .andExpect {
+                status { isAccepted() }
+            }
+
+    }
+
+    @Test
+    fun `inbox processActivityに失敗したときAcceptが返ってくる`() = runTest {
+        val json = """{"type":"Follow"}"""
+        whenever(apService.parseActivity(eq(json))).doReturn(ActivityType.Follow)
+        whenever(
+            apService.processActivity(
+                eq(json),
+                eq(ActivityType.Follow)
+            )
+        ).doThrow(FailedToGetResourcesException::class)
+
+        mockMvc
+            .post("/inbox") {
+                content = json
+                contentType = MediaType.APPLICATION_JSON
+            }
+            .asyncDispatch()
+            .andExpect {
+                status { isAccepted() }
+            }
+
+    }
+}