diff --git a/server/src/http/chat.rs b/server/src/http/chat.rs
index de3ff1e..137d589 100644
--- a/server/src/http/chat.rs
+++ b/server/src/http/chat.rs
@@ -23,3 +23,36 @@ impl ChatApi {
         Ok(Json(true))
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use tempfile::TempDir;
+
+    fn test_api(dir: &TempDir) -> ChatApi {
+        ChatApi {
+            ctx: Arc::new(AppContext::new_test(dir.path().to_path_buf())),
+        }
+    }
+
+    #[tokio::test]
+    async fn cancel_chat_returns_true() {
+        let dir = TempDir::new().unwrap();
+        let api = test_api(&dir);
+        let result = api.cancel_chat().await;
+        assert!(result.is_ok());
+        assert!(result.unwrap().0);
+    }
+
+    #[tokio::test]
+    async fn cancel_chat_sends_cancel_signal() {
+        let dir = TempDir::new().unwrap();
+        let api = test_api(&dir);
+        let mut cancel_rx = api.ctx.state.cancel_rx.clone();
+        cancel_rx.borrow_and_update();
+
+        api.cancel_chat().await.unwrap();
+
+        assert!(*cancel_rx.borrow());
+    }
+}