diff --git a/ui/litellm-dashboard/src/components/view_logs/TraceView/TraceDrawer.test.tsx b/ui/litellm-dashboard/src/components/view_logs/TraceView/TraceDrawer.test.tsx
new file mode 100644
index 00000000000..2fb840331d2
--- /dev/null
+++ b/ui/litellm-dashboard/src/components/view_logs/TraceView/TraceDrawer.test.tsx
@@ -0,0 +1,125 @@
+import { screen, within } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+import { renderWithProviders, testQueryClient } from "../../../../tests/test-utils";
+import researchTrace from "./__fixtures__/research_trace.json";
+import swarmTrace from "./__fixtures__/swarm_trace.json";
+import { initialTraceView, TraceDrawer } from "./TraceDrawer";
+import type { SpanDetail, Trace } from "./traceTypes";
+
+vi.mock("../../networking", () => ({
+  agentTraceCall: vi.fn(),
+  agentTraceSpanCall: vi.fn(),
+}));
+
+import { agentTraceCall, agentTraceSpanCall } from "../../networking";
+
+const swarm = swarmTrace as Trace;
+const research = researchTrace as Trace;
+
+const spanDetail = (spanId: string): SpanDetail => ({
+  span_id: spanId,
+  input: JSON.stringify([{ role: "user", content: "Compare ClickHouse and Postgres ingest" }]),
+  output: JSON.stringify({
+    role: "assistant",
+    content: "Calling tools",
+    tool_calls: [{ name: "lookup_benchmark", args: { db: "clickhouse" } }],
+  }),
+  attributes: { "gen_ai.system": "openai" },
+});
+
+const renderDrawer = (trace: Trace, props: Partial<React.ComponentProps<typeof TraceDrawer>> = {}) => {
+  vi.mocked(agentTraceCall).mockResolvedValue(trace);
+  return renderWithProviders(
+    <TraceDrawer open traceId={trace.summary.trace_id} accessToken="sk-test" onClose={vi.fn()} {...props} />,
+  );
+};
+
+describe("TraceDrawer", () => {
+  beforeEach(() => {
+    testQueryClient.clear();
+    vi.mocked(agentTraceSpanCall).mockImplementation(async (_token, _trace, spanId) => spanDetail(spanId));
+  });
+
+  it("opens a healthy trace on the Steps view with the stats strip and per-agent cost split", async () => {
+    renderDrawer(research);
+
+    expect(await screen.findByRole("heading", { name: "research_lead" })).toBeInTheDocument();
+    const stats = screen.getByLabelText("Trace stats");
+    expect(stats).toHaveTextContent("40.20s");
+    expect(stats).toHaveTextContent("LLM calls21");
+    expect(stats).toHaveTextContent("Tool calls25");
+    expect(stats).toHaveTextContent("$0.1283");
+    expect(screen.getByLabelText("Cost by agent")).toHaveTextContent("researcher $0.0892");
+    expect(screen.getByRole("button", { name: "Steps" })).toHaveAttribute("aria-pressed", "true");
+    expect(screen.getByRole("list", { name: "Trace steps" })).toBeInTheDocument();
+  });
+
+  it("opens a failed trace on the Tree view with the first failed span selected", async () => {
+    renderDrawer(swarm);
+
+    const tree = await screen.findByRole("tree", { name: "Span tree" });
+    expect(screen.getByRole("button", { name: "Tree" })).toHaveAttribute("aria-pressed", "true");
+    const selected = within(tree).getByRole("treeitem", { selected: true });
+    expect(selected).toHaveTextContent("lookup_benchmark");
+    // the 12 researcher invocations collapse into one group row
+    expect(within(tree).getByText(/researcher ×12 · \$0\.0635 · p50/)).toBeInTheDocument();
+  });
+
+  it("shows the LiteLLM request card with model group and deployment for an LLM span", async () => {
+    const user = userEvent.setup();
+    const onOpenRequestLog = vi.fn();
+    const llm = research.spans.find((s) => s.type === "llm" && s.litellm) as Trace["spans"][number];
+    renderDrawer(research, { initialSpanId: llm.span_id, onOpenRequestLog });
+
+    const card = await screen.findByRole("region", { name: "LiteLLM request" });
+    expect(card).toHaveTextContent(llm.litellm?.request_id ?? "");
+    expect(card).toHaveTextContent("claude-sonnet-4-5");
+    expect(card).toHaveTextContent("openai/claude-sonnet-4-5 (openai)");
+    await user.click(within(card).getByRole("button", { name: "Open request log →" }));
+    expect(onOpenRequestLog).toHaveBeenCalledWith(llm.litellm?.request_id);
+    expect(await screen.findByText(/lookup_benchmark/, { selector: "b" })).toBeInTheDocument();
+  });
+
+  it("hides framework spans until the toggle is checked", async () => {
+    const user = userEvent.setup();
+    renderDrawer(research);
+    await user.click(await screen.findByRole("button", { name: "Tree" }));
+
+    const total = research.spans.length;
+    expect(screen.getByText(new RegExp(`^\\d+ of ${total} spans$`))).not.toHaveTextContent(new RegExp(`^${total} of`));
+    await user.click(screen.getByRole("checkbox"));
+    expect(screen.getByText(`${total} of ${total} spans`)).toBeInTheDocument();
+  });
+
+  it("moves the selection with J and K", async () => {
+    const user = userEvent.setup();
+    renderDrawer(research);
+    const steps = await screen.findByRole("list", { name: "Trace steps" });
+    const items = within(steps).getAllByRole("listitem");
+    expect(items[0]).toHaveAttribute("aria-current", "step");
+    await user.keyboard("j");
+    expect(items[1]).toHaveAttribute("aria-current", "step");
+    await user.keyboard("k");
+    expect(items[0]).toHaveAttribute("aria-current", "step");
+  });
+
+  it("jumps from an agent graph invocation to the tree focused on that span", async () => {
+    const user = userEvent.setup();
+    renderDrawer(swarm);
+    await user.click(await screen.findByRole("button", { name: "Graph" }));
+    await user.click(screen.getByRole("button", { name: "Agent critic" }));
+    await user.click(within(screen.getByRole("list", { name: "critic invocations" })).getByRole("button"));
+
+    const tree = screen.getByRole("tree", { name: "Span tree" });
+    expect(within(tree).getByRole("treeitem", { selected: true })).toHaveTextContent("critic");
+  });
+});
+
+describe("initialTraceView", () => {
+  it("prefers an explicitly requested span", () => {
+    const llm = swarm.spans.find((s) => s.type === "llm") as Trace["spans"][number];
+    expect(initialTraceView(swarm, llm.span_id)).toEqual({ mode: "steps", selectedId: llm.span_id });
+  });
+});