diff --git a/frontend/tests/unit/hooks/useJobsData.extended.test.tsx b/frontend/tests/unit/hooks/useJobsData.extended.test.tsx
index 44c5ba8..8ec2036 100644
--- a/frontend/tests/unit/hooks/useJobsData.extended.test.tsx
+++ b/frontend/tests/unit/hooks/useJobsData.extended.test.tsx
@@ -67,6 +67,38 @@ describe("useJobsData extended", () => {
     expect(result.current.error).toBe("falha jobs");
   });
 
+  it("aplica os metadados padrão quando a API retorna payload parcial", async () => {
+    mocks.fetchJobsByAPIMock.mockResolvedValueOnce({});
+
+    const { result } = renderHook(() => useJobsData(3, 10));
+
+    await waitFor(() => {
+      expect(result.current.loading).toBe(false);
+      expect(result.current.meta).toEqual({
+        total: 0,
+        hasNext: false,
+        hasPrev: false,
+        page: 3,
+        limit: 10,
+        totalPages: 0,
+      });
+    });
+
+    expect(result.current.jobs).toEqual([]);
+  });
+
+  it("usa mensagem padrão quando carregar vagas rejeita sem Error", async () => {
+    mocks.fetchJobsByAPIMock.mockRejectedValueOnce("offline");
+
+    const { result } = renderHook(() => useJobsData());
+
+    await waitFor(() => {
+      expect(result.current.error).toBe(
+        "Erro inesperado ao carregar vagas.",
+      );
+    });
+  });
+
   it("triggerScraper carrega jobs após executar request", async () => {
     const { result } = renderHook(() => useJobsData());
 
@@ -78,4 +110,23 @@ describe("useJobsData extended", () => {
     expect(mocks.fetchJobsByAPIMock).toHaveBeenCalled();
     expect(result.current.scraping).toBe(false);
   });
+
+  it("usa mensagem padrão quando o scraper rejeita sem Error", async () => {
+    mocks.runScraperRequestMock.mockRejectedValueOnce("indisponível");
+
+    const { result } = renderHook(() => useJobsData());
+
+    await waitFor(() => {
+      expect(result.current.loading).toBe(false);
+    });
+
+    await act(async () => {
+      await result.current.triggerScraper();
+    });
+
+    expect(result.current.error).toBe(
+      "Erro inesperado ao executar o scraper.",
+    );
+    expect(result.current.scraping).toBe(false);
+  });
 });
diff --git a/frontend/tests/unit/new_dashboard/branch-coverage.test.tsx b/frontend/tests/unit/new_dashboard/branch-coverage.test.tsx
index 8af7f13..765865e 100644
--- a/frontend/tests/unit/new_dashboard/branch-coverage.test.tsx
+++ b/frontend/tests/unit/new_dashboard/branch-coverage.test.tsx
@@ -6,6 +6,7 @@ import { Header } from "@/domains/new_dashboard/components/layout/Header";
 import { MessageDetailModal } from "@/domains/new_dashboard/components/layout/MessageDetailModal";
 import { JobDetailModal } from "@/domains/new_dashboard/components/jobs/JobDetailModal";
 import { JobRow } from "@/domains/new_dashboard/components/jobs/JobRow";
+import { MentoringTab } from "@/domains/new_dashboard/components/mentoring/MentoringTab";
 import { ProfileForm } from "@/domains/new_dashboard/components/profile/ProfileForm";
 import { Modal } from "@/domains/new_dashboard/components/shared/Modal";
 import {
@@ -236,6 +237,27 @@ describe("new_dashboard branch coverage", () => {
     expect(onClose).toHaveBeenCalledOnce();
   });
 
+  it("abre, confirma e fecha os detalhes de uma mentoria", () => {
+    render(<MentoringTab />);
+
+    fireEvent.click(screen.getAllByRole("button", { name: "Ver Mais" })[0]);
+
+    expect(
+      screen.getByRole("heading", { name: "Julio Silva", level: 2 }),
+    ).toBeInTheDocument();
+    expect(screen.queryByText(/participação confirmada/i)).not.toBeInTheDocument();
+
+    fireEvent.click(
+      screen.getByRole("button", { name: /confirmar participação/i }),
+    );
+    expect(screen.getByText(/participação confirmada/i)).toBeInTheDocument();
+
+    fireEvent.click(screen.getByRole("button", { name: "Fechar" }));
+    expect(
+      screen.queryByRole("heading", { name: "Julio Silva", level: 2 }),
+    ).not.toBeInTheDocument();
+  });
+
   it("usa origem sistema como fallback no detalhe da mensagem", () => {
     render(
       <MessageDetailModal
diff --git a/frontend/tests/unit/new_dashboard/theme.toast.test.tsx b/frontend/tests/unit/new_dashboard/theme.toast.test.tsx
index c58be1b..312d26e 100644
--- a/frontend/tests/unit/new_dashboard/theme.toast.test.tsx
+++ b/frontend/tests/unit/new_dashboard/theme.toast.test.tsx
@@ -105,6 +105,12 @@ describe("new_dashboard theme and toast contexts", () => {
     expect(container).toBeEmptyDOMElement();
   });
 
+  it("renderiza toast quando recebe uma mensagem", () => {
+    render(<Toast message="Perfil atualizado" />);
+
+    expect(screen.getByText("Perfil atualizado")).toBeInTheDocument();
+  });
+
   it("lança erro quando o contexto de toast é usado fora do provider", () => {
     expect(() => render(<ToastHookConsumer />)).toThrow(
       /useToastContext must be used within ToastProvider/i,
diff --git a/frontend/tests/unit/services/auth.service.test.tsx b/frontend/tests/unit/services/auth.service.test.tsx
index 96c888d..ae0773a 100644
--- a/frontend/tests/unit/services/auth.service.test.tsx
+++ b/frontend/tests/unit/services/auth.service.test.tsx
@@ -33,6 +33,50 @@ describe("authService", () => {
   beforeEach(() => {
     fetchMock.mockReset();
     vi.restoreAllMocks();
+    vi.unstubAllEnvs();
+  });
+
+  describe("response parsing and URL normalization", () => {
+    it("uses the configured API URL without trailing slashes", async () => {
+      vi.stubEnv("VITE_API_BASE_URL", "https://api.example.com///");
+      fetchMock.mockResolvedValueOnce(mockResponse({ jsonData: { ok: true } }));
+
+      await expect(auth.logout()).resolves.toEqual({ ok: true });
+
+      expect(fetchMock).toHaveBeenCalledWith(
+        "https://api.example.com/auth/logout",
+        expect.objectContaining({ method: "POST" }),
+      );
+    });
+
+    it("parses non-JSON response bodies as messages", async () => {
+      fetchMock.mockResolvedValueOnce(
+        mockResponse({
+          contentType: "text/plain",
+          textData: "Logout concluído",
+        }),
+      );
+
+      await expect(auth.logout()).resolves.toEqual({
+        message: "Logout concluído",
+      });
+    });
+
+    it("returns an empty payload for an empty response body", async () => {
+      fetchMock.mockResolvedValueOnce(
+        mockResponse({ contentType: "", textData: "" }),
+      );
+
+      await expect(auth.logout()).resolves.toEqual({});
+    });
+
+    it("returns an empty payload when response parsing fails", async () => {
+      const response = mockResponse({ contentType: "application/json" });
+      response.json.mockRejectedValueOnce(new SyntaxError("invalid JSON"));
+      fetchMock.mockResolvedValueOnce(response);
+
+      await expect(auth.logout()).resolves.toEqual({});
+    });
   });
 
   describe("login", () => {