diff --git a/src/test/kotlin/dev/usbharu/hideout/mastodon/interfaces/api/apps/MastodonAppsApiControllerTest.kt b/src/test/kotlin/dev/usbharu/hideout/mastodon/interfaces/api/apps/MastodonAppsApiControllerTest.kt
new file mode 100644
index 00000000..539c24e5
--- /dev/null
+++ b/src/test/kotlin/dev/usbharu/hideout/mastodon/interfaces/api/apps/MastodonAppsApiControllerTest.kt
@@ -0,0 +1,115 @@
+package dev.usbharu.hideout.mastodon.interfaces.api.apps
+
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import dev.usbharu.hideout.domain.mastodon.model.generated.Application
+import dev.usbharu.hideout.domain.mastodon.model.generated.AppsRequest
+import dev.usbharu.hideout.generate.JsonOrFormModelMethodProcessor
+import dev.usbharu.hideout.mastodon.service.app.AppApiService
+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.eq
+import org.mockito.kotlin.whenever
+import org.springframework.http.MediaType
+import org.springframework.http.converter.HttpMessageConverter
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter
+import org.springframework.test.web.servlet.MockMvc
+import org.springframework.test.web.servlet.post
+import org.springframework.test.web.servlet.setup.MockMvcBuilders
+import org.springframework.web.method.annotation.ModelAttributeMethodProcessor
+import org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor
+
+@ExtendWith(MockitoExtension::class)
+class MastodonAppsApiControllerTest {
+
+    @Mock
+    private lateinit var appApiService: AppApiService
+
+    @InjectMocks
+    private lateinit var mastodonAppsApiController: MastodonAppsApiController
+
+    private lateinit var mockMvc: MockMvc
+
+    @BeforeEach
+    fun setUp() {
+        mockMvc = MockMvcBuilders.standaloneSetup(mastodonAppsApiController).setCustomArgumentResolvers(
+            JsonOrFormModelMethodProcessor(
+                ModelAttributeMethodProcessor(false), RequestResponseBodyMethodProcessor(
+                    mutableListOf<HttpMessageConverter<*>>(
+                        MappingJackson2HttpMessageConverter()
+                    )
+                )
+            )
+        ).build()
+    }
+
+    @Test
+    fun `apiV1AppsPost JSONで作成に成功したら200が返ってくる`() = runTest {
+
+        val appsRequest = AppsRequest(
+            "test",
+            "https://example.com",
+            "write",
+            null
+        )
+        val application = Application(
+            "test",
+            "",
+            null,
+            "safdash;",
+            "aksdhgoa"
+        )
+
+        whenever(appApiService.createApp(eq(appsRequest))).doReturn(application)
+
+        val objectMapper = jacksonObjectMapper()
+        val writeValueAsString = objectMapper.writeValueAsString(appsRequest)
+
+        mockMvc
+            .post("/api/v1/apps") {
+                contentType = MediaType.APPLICATION_JSON
+                content = writeValueAsString
+            }
+            .asyncDispatch()
+            .andExpect { status { isOk() } }
+            .andExpect { content { json(objectMapper.writeValueAsString(application)) } }
+    }
+
+    @Test
+    fun `apiV1AppsPost FORMで作成に成功したら200が返ってくる`() = runTest {
+
+        val appsRequest = AppsRequest(
+            "test",
+            "https://example.com",
+            "write",
+            null
+        )
+        val application = Application(
+            "test",
+            "",
+            null,
+            "safdash;",
+            "aksdhgoa"
+        )
+
+        whenever(appApiService.createApp(eq(appsRequest))).doReturn(application)
+
+        val objectMapper = jacksonObjectMapper()
+
+        mockMvc
+            .post("/api/v1/apps") {
+                contentType = MediaType.APPLICATION_FORM_URLENCODED
+                param("client_name", "test")
+                param("redirect_uris", "https://example.com")
+                param("scopes", "write")
+            }
+            .asyncDispatch()
+            .andExpect { status { isOk() } }
+            .andExpect { content { json(objectMapper.writeValueAsString(application)) } }
+    }
+}