diff --git a/tests/unit/code-chunker.test.ts b/tests/unit/code-chunker.test.ts
index 482bb0c..28a09b0 100644
--- a/tests/unit/code-chunker.test.ts
+++ b/tests/unit/code-chunker.test.ts
@@ -2,6 +2,60 @@ import { describe, it, expect, vi, beforeEach } from "vitest";
 import { TreeSitterChunker } from "../../src/lite/chunker-treesitter.js";
 import { ValidationError } from "../../src/errors.js";
 
+interface MockNode {
+  type: string;
+  text: string;
+  startPosition: { row: number; column: number };
+  endPosition: { row: number; column: number };
+  childCount: number;
+  child: (i: number) => MockNode | null;
+  namedChildCount: number;
+  namedChild: (i: number) => MockNode | null;
+}
+
+/**
+ * Helper: create a mock TSNode that simulates tree-sitter node shape.
+ */
+function makeMockNode(
+  type: string,
+  text: string,
+  startRow: number,
+  endRow: number,
+  children: MockNode[] = [],
+): MockNode {
+  return {
+    type,
+    text,
+    startPosition: { row: startRow, column: 0 },
+    endPosition: { row: endRow, column: 0 },
+    childCount: children.length,
+    child: (i: number) => children[i] ?? null,
+    namedChildCount: children.length,
+    namedChild: (i: number) => children[i] ?? null,
+  };
+}
+
+/**
+ * Create a chunker with mocked tree-sitter internals for testing
+ * the algorithm without requiring tree-sitter to be installed.
+ */
+function createMockedChunker(rootChildren: ReturnType<typeof makeMockNode>[]): TreeSitterChunker {
+  const instance = new TreeSitterChunker();
+
+  const rootNode = makeMockNode("program", "", 0, 100, rootChildren);
+
+  // Mock the private getParser and loadGrammar methods
+  // @ts-expect-error — accessing private method for testing
+  instance.getParser = vi.fn().mockResolvedValue({
+    setLanguage: vi.fn(),
+    parse: vi.fn().mockReturnValue({ rootNode }),
+  });
+  // @ts-expect-error — accessing private method for testing
+  instance.loadGrammar = vi.fn().mockResolvedValue({});
+
+  return instance;
+}
+
 describe("TreeSitterChunker", () => {
   let chunker: TreeSitterChunker;
 
@@ -73,62 +127,6 @@ describe("TreeSitterChunker", () => {
   });
 
   describe("chunk() — with mocked tree-sitter", () => {
-    interface MockNode {
-      type: string;
-      text: string;
-      startPosition: { row: number; column: number };
-      endPosition: { row: number; column: number };
-      childCount: number;
-      child: (i: number) => MockNode | null;
-      namedChildCount: number;
-      namedChild: (i: number) => MockNode | null;
-    }
-
-    /**
-     * Helper: create a mock TSNode that simulates tree-sitter node shape.
-     */
-    function makeMockNode(
-      type: string,
-      text: string,
-      startRow: number,
-      endRow: number,
-      children: MockNode[] = [],
-    ): MockNode {
-      return {
-        type,
-        text,
-        startPosition: { row: startRow, column: 0 },
-        endPosition: { row: endRow, column: 0 },
-        childCount: children.length,
-        child: (i: number) => children[i] ?? null,
-        namedChildCount: children.length,
-        namedChild: (i: number) => children[i] ?? null,
-      };
-    }
-
-    /**
-     * Create a chunker with mocked tree-sitter internals for testing
-     * the algorithm without requiring tree-sitter to be installed.
-     */
-    function createMockedChunker(
-      rootChildren: ReturnType<typeof makeMockNode>[],
-    ): TreeSitterChunker {
-      const instance = new TreeSitterChunker();
-
-      const rootNode = makeMockNode("program", "", 0, 100, rootChildren);
-
-      // Mock the private getParser and loadGrammar methods
-      // @ts-expect-error — accessing private method for testing
-      instance.getParser = vi.fn().mockResolvedValue({
-        setLanguage: vi.fn(),
-        parse: vi.fn().mockReturnValue({ rootNode }),
-      });
-      // @ts-expect-error — accessing private method for testing
-      instance.loadGrammar = vi.fn().mockResolvedValue({});
-
-      return instance;
-    }
-
     it("should chunk TypeScript code at function boundaries", async () => {
       const importNode = makeMockNode("import_statement", 'import { foo } from "bar";', 0, 0);
       const fn1 = makeMockNode(
diff --git a/tests/unit/config.test.ts b/tests/unit/config.test.ts
index 2a54616..fa34f2e 100644
--- a/tests/unit/config.test.ts
+++ b/tests/unit/config.test.ts
@@ -71,6 +71,22 @@ describe("config", () => {
   });
 });
 
+function makeConfig(overrides: Partial<LibScopeConfig> = {}): LibScopeConfig {
+  return {
+    embedding: {
+      provider: "local",
+      ollamaUrl: "http://localhost:11434",
+      ollamaModel: "nomic-embed-text",
+      openaiModel: "text-embedding-3-small",
+      ...overrides.embedding,
+    },
+    database: { path: "/tmp/test-libscope/libscope.db", ...overrides.database },
+    indexing: { maxDocumentSize: 100 * 1024 * 1024, ...overrides.indexing },
+    logging: { level: "info", ...overrides.logging },
+    ...("llm" in overrides ? { llm: overrides.llm } : {}),
+  };
+}
+
 describe("validateConfig", () => {
   let warnSpy: ReturnType<typeof vi.fn>;
   const savedEnv: Record<string, string | undefined> = {};
@@ -104,22 +120,6 @@ describe("validateConfig", () => {
     }
   });
 
-  function makeConfig(overrides: Partial<LibScopeConfig> = {}): LibScopeConfig {
-    return {
-      embedding: {
-        provider: "local",
-        ollamaUrl: "http://localhost:11434",
-        ollamaModel: "nomic-embed-text",
-        openaiModel: "text-embedding-3-small",
-        ...overrides.embedding,
-      },
-      database: { path: "/tmp/test-libscope/libscope.db", ...overrides.database },
-      indexing: { maxDocumentSize: 100 * 1024 * 1024, ...overrides.indexing },
-      logging: { level: "info", ...overrides.logging },
-      ...("llm" in overrides ? { llm: overrides.llm } : {}),
-    };
-  }
-
   it("should pass validation silently for local provider", () => {
     const config = makeConfig();
     const warnings = validateConfig(config);
diff --git a/tests/unit/confluence.test.ts b/tests/unit/confluence.test.ts
index 3afbad2..91d6b4b 100644
--- a/tests/unit/confluence.test.ts
+++ b/tests/unit/confluence.test.ts
@@ -46,6 +46,26 @@ function makePageDetail(overrides: Record<string, unknown> = {}) {
   };
 }
 
+function mockFetchResponse(body: unknown, ok = true, status = 200): Response {
+  return {
+    ok,
+    status,
+    statusText: ok ? "OK" : "Error",
+    json: () => Promise.resolve(body),
+    text: () => Promise.resolve(JSON.stringify(body)),
+    headers: new Headers(),
+    redirected: false,
+    type: "basic",
+    url: "",
+    clone: () => mockFetchResponse(body, ok, status),
+    body: null,
+    bodyUsed: false,
+    arrayBuffer: () => Promise.resolve(new ArrayBuffer(0)),
+    blob: () => Promise.resolve(new Blob()),
+    formData: () => Promise.resolve(new FormData()),
+  } as Response;
+}
+
 describe("Confluence connector", () => {
   let db: Database.Database;
   let provider: MockEmbeddingProvider;
@@ -63,26 +83,6 @@ describe("Confluence connector", () => {
     db.close();
   });
 
-  function mockFetchResponse(body: unknown, ok = true, status = 200): Response {
-    return {
-      ok,
-      status,
-      statusText: ok ? "OK" : "Error",
-      json: () => Promise.resolve(body),
-      text: () => Promise.resolve(JSON.stringify(body)),
-      headers: new Headers(),
-      redirected: false,
-      type: "basic",
-      url: "",
-      clone: () => mockFetchResponse(body, ok, status),
-      body: null,
-      bodyUsed: false,
-      arrayBuffer: () => Promise.resolve(new ArrayBuffer(0)),
-      blob: () => Promise.resolve(new Blob()),
-      formData: () => Promise.resolve(new FormData()),
-    } as Response;
-  }
-
   const baseConfig: ConfluenceConfig = {
     baseUrl: "https://acme.atlassian.net",
     email: "user@example.com",
diff --git a/tests/unit/onenote.test.ts b/tests/unit/onenote.test.ts
index 4c12337..81d29b6 100644
--- a/tests/unit/onenote.test.ts
+++ b/tests/unit/onenote.test.ts
@@ -59,6 +59,37 @@ function makeConfig(overrides?: Partial<OneNoteConfig>): OneNoteConfig {
   };
 }
 
+function setupGraphMocks(
+  notebooks: Array<{ id: string; displayName: string }> = [
+    { id: "nb1", displayName: "Work Notebook" },
+  ],
+  sections: Array<{ id: string; displayName: string }> = [
+    { id: "sec1", displayName: "Project Notes" },
+  ],
+  pages: Array<{ id: string; title: string; lastModifiedDateTime: string }> = [
+    { id: "pg1", title: "Meeting Notes", lastModifiedDateTime: "2024-01-15T10:00:00Z" },
+  ],
+  pageHtml: string = "<h1>Meeting Notes</h1><p>Discussion points</p>",
+): void {
+  mockFetch((url: string, init?: RequestInit) => {
+    const accept = (init?.headers as Record<string, string>)?.Accept ?? "";
+
+    if (url.includes("/me/onenote/notebooks") && !url.includes("/sections")) {
+      return jsonResponse({ value: notebooks });
+    }
+    if (url.includes("/sections") && !url.includes("/pages")) {
+      return jsonResponse({ value: sections });
+    }
+    if (url.includes("/pages") && !url.includes("/content")) {
+      return jsonResponse({ value: pages });
+    }
+    if (url.includes("/content") || accept === "text/html") {
+      return htmlResponse(pageHtml);
+    }
+    return new Response("Not found", { status: 404 });
+  });
+}
+
 // ---------------------------------------------------------------------------
 // Tests
 // ---------------------------------------------------------------------------
@@ -253,37 +284,6 @@ describe("OneNote Connector", () => {
   // -------------------------------------------------------------------------
 
   describe("syncOneNote", () => {
-    function setupGraphMocks(
-      notebooks: Array<{ id: string; displayName: string }> = [
-        { id: "nb1", displayName: "Work Notebook" },
-      ],
-      sections: Array<{ id: string; displayName: string }> = [
-        { id: "sec1", displayName: "Project Notes" },
-      ],
-      pages: Array<{ id: string; title: string; lastModifiedDateTime: string }> = [
-        { id: "pg1", title: "Meeting Notes", lastModifiedDateTime: "2024-01-15T10:00:00Z" },
-      ],
-      pageHtml: string = "<h1>Meeting Notes</h1><p>Discussion points</p>",
-    ): void {
-      mockFetch((url: string, init?: RequestInit) => {
-        const accept = (init?.headers as Record<string, string>)?.Accept ?? "";
-
-        if (url.includes("/me/onenote/notebooks") && !url.includes("/sections")) {
-          return jsonResponse({ value: notebooks });
-        }
-        if (url.includes("/sections") && !url.includes("/pages")) {
-          return jsonResponse({ value: sections });
-        }
-        if (url.includes("/pages") && !url.includes("/content")) {
-          return jsonResponse({ value: pages });
-        }
-        if (url.includes("/content") || accept === "text/html") {
-          return htmlResponse(pageHtml);
-        }
-        return new Response("Not found", { status: 404 });
-      });
-    }
-
     it("performs full sync creating topics and indexing pages", async () => {
       setupGraphMocks();
 
diff --git a/tests/unit/slack.test.ts b/tests/unit/slack.test.ts
index 3f5bdde..79a53d5 100644
--- a/tests/unit/slack.test.ts
+++ b/tests/unit/slack.test.ts
@@ -82,6 +82,26 @@ describe("convertSlackMrkdwn", () => {
   });
 });
 
+function setupChannelList(channels: Array<{ id: string; name: string }> = []): void {
+  mockFetch.mockImplementationOnce(() =>
+    Promise.resolve(slackOk({ channels, response_metadata: {} })),
+  );
+}
+
+function setupMessages(messages: Array<Record<string, unknown>> = []): void {
+  mockFetch.mockImplementationOnce(() =>
+    Promise.resolve(slackOk({ messages, response_metadata: {} })),
+  );
+}
+
+function setupUserInfo(user: Record<string, unknown>): void {
+  mockFetch.mockImplementationOnce(() => Promise.resolve(slackOk({ user })));
+}
+
+function setupThreadReplies(messages: Array<Record<string, unknown>> = []): void {
+  mockFetch.mockImplementationOnce(() => Promise.resolve(slackOk({ messages })));
+}
+
 describe("syncSlack", () => {
   let db: Database.Database;
   let provider: MockEmbeddingProvider;
@@ -104,26 +124,6 @@ describe("syncSlack", () => {
     threadMode: "aggregate",
   };
 
-  function setupChannelList(channels: Array<{ id: string; name: string }> = []): void {
-    mockFetch.mockImplementationOnce(() =>
-      Promise.resolve(slackOk({ channels, response_metadata: {} })),
-    );
-  }
-
-  function setupMessages(messages: Array<Record<string, unknown>> = []): void {
-    mockFetch.mockImplementationOnce(() =>
-      Promise.resolve(slackOk({ messages, response_metadata: {} })),
-    );
-  }
-
-  function setupUserInfo(user: Record<string, unknown>): void {
-    mockFetch.mockImplementationOnce(() => Promise.resolve(slackOk({ user })));
-  }
-
-  function setupThreadReplies(messages: Array<Record<string, unknown>> = []): void {
-    mockFetch.mockImplementationOnce(() => Promise.resolve(slackOk({ messages })));
-  }
-
   it("lists and filters channels", async () => {
     setupChannelList([
       { id: "C001", name: "general" },