diff --git a/app/src/test/java/kr/co/vividnext/sodalive/v2/main/chat/dm/DmChatRemovedEndpointSourceTest.kt b/app/src/test/java/kr/co/vividnext/sodalive/v2/main/chat/dm/DmChatRemovedEndpointSourceTest.kt
new file mode 100644
index 00000000..4db55b12
--- /dev/null
+++ b/app/src/test/java/kr/co/vividnext/sodalive/v2/main/chat/dm/DmChatRemovedEndpointSourceTest.kt
@@ -0,0 +1,70 @@
+package kr.co.vividnext.sodalive.v2.main.chat.dm
+
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import java.io.File
+
+class DmChatRemovedEndpointSourceTest {
+
+    @Test
+    fun `active DM 채팅 경로에는 제거된 SSE와 text REST endpoint가 남지 않는다`() {
+        val activeSources = listOf(
+            "app/src/main/java/kr/co/vividnext/sodalive/v2/main/chat/dm/DmChatRoomActivity.kt",
+            "app/src/main/java/kr/co/vividnext/sodalive/v2/main/chat/dm/DmChatRoomViewModel.kt",
+            "app/src/main/java/kr/co/vividnext/sodalive/v2/main/chat/dm/data/DmChatApi.kt",
+            "app/src/main/java/kr/co/vividnext/sodalive/v2/main/chat/dm/data/DmChatRepository.kt",
+            "app/src/main/java/kr/co/vividnext/sodalive/v2/main/chat/dm/data/DmChatSocketClient.kt"
+        )
+
+        activeSources.forEach { path ->
+            val source = projectFile(path).readText()
+            assertFalse("$path must not use removed SSE events endpoint", source.contains("/events"))
+            assertFalse("$path must not use removed disconnect endpoint", source.contains("events/disconnect"))
+            assertFalse("$path must not use removed text REST endpoint", source.contains("messages/text"))
+            assertFalse("$path must not use SSE accept header", source.contains("text/event-stream"))
+            assertFalse("$path must not use EventSource", source.contains("EventSource"))
+        }
+    }
+
+    @Test
+    fun `텍스트 전송과 lifecycle 종료는 WebSocket envelope를 사용한다`() {
+        val viewModel = projectFile(
+            "app/src/main/java/kr/co/vividnext/sodalive/v2/main/chat/dm/DmChatRoomViewModel.kt"
+        ).readText()
+        val repository = projectFile(
+            "app/src/main/java/kr/co/vividnext/sodalive/v2/main/chat/dm/data/DmChatRepository.kt"
+        ).readText()
+
+        assertTrue(viewModel.contains("repository.sendSocketText("))
+        assertTrue(viewModel.contains("repository.sendLeaveRoom(roomId)"))
+        assertTrue(viewModel.contains("repository.closeSocket()"))
+        assertTrue(repository.contains("fun sendSocketText"))
+        assertTrue(repository.contains("fun sendLeaveRoom"))
+        assertFalse(repository.contains("disconnectRealtime"))
+    }
+
+    @Test
+    fun `음성 메시지는 전송 API 추가 없이 DTO 필드 보존 범위로 유지한다`() {
+        val api = projectFile(
+            "app/src/main/java/kr/co/vividnext/sodalive/v2/main/chat/dm/data/DmChatApi.kt"
+        ).readText()
+        val models = projectFile(
+            "app/src/main/java/kr/co/vividnext/sodalive/v2/main/chat/dm/data/DmChatModels.kt"
+        ).readText()
+        val repository = projectFile(
+            "app/src/main/java/kr/co/vividnext/sodalive/v2/main/chat/dm/data/DmChatRepository.kt"
+        ).readText()
+
+        assertTrue(models.contains("@SerializedName(\"voiceMessageUrl\") val voiceMessageUrl: String?"))
+        assertFalse(api.contains("messages/voice"))
+        assertFalse(api.contains("Multipart"))
+        assertFalse(repository.contains("sendDmVoiceMessage"))
+    }
+
+    private fun projectFile(relativePath: String): File {
+        val candidates = listOf(File(relativePath), File("../$relativePath"))
+        return candidates.firstOrNull { it.exists() }
+            ?: error("Project file not found: $relativePath")
+    }
+}