diff --git a/app/src/test/java/com/m57/hermescontrol/ui/chat/ChatViewModelTest.kt b/app/src/test/java/com/m57/hermescontrol/ui/chat/ChatViewModelTest.kt
index 52578442..200e9fa6 100644
--- a/app/src/test/java/com/m57/hermescontrol/ui/chat/ChatViewModelTest.kt
+++ b/app/src/test/java/com/m57/hermescontrol/ui/chat/ChatViewModelTest.kt
@@ -711,6 +711,29 @@ class ChatViewModelTest {
             verify { HermesWsClient.send(WsMethods.SESSION_RESUME, mapOf("session_id" to "session-456"), any()) }
         }
 
+    @Test
+    fun testInterruptSession_withSessionId_sendsRpc() =
+        runTest {
+            val (viewModel, sessionId) = createViewModelWithSession()
+
+            viewModel.interruptSession()
+            advanceUntilIdle()
+
+            verify { HermesWsClient.send(WsMethods.SESSION_INTERRUPT, mapOf("session_id" to sessionId), any()) }
+        }
+
+    @Test
+    fun testInterruptSession_withoutSessionId_doesNotSendRpc() =
+        runTest {
+            val viewModel = createViewModel()
+            advanceUntilIdle()
+
+            viewModel.interruptSession()
+            advanceUntilIdle()
+
+            verify(exactly = 0) { HermesWsClient.send(WsMethods.SESSION_INTERRUPT, any(), any()) }
+        }
+
     // ── Error handling ───────────────────────────────────────────────────────
 
     @Test