diff --git a/extensions/discord/src/client.proxy.test.ts b/extensions/discord/src/client.proxy.test.ts
index 64e244cf3aa..611ce8007b4 100644
--- a/extensions/discord/src/client.proxy.test.ts
+++ b/extensions/discord/src/client.proxy.test.ts
@@ -44,7 +44,8 @@ describe("createDiscordRestClient proxy support", () => {
       options?: { fetch?: typeof fetch };
     };
 
-    expect(requestClient.options?.fetch).toEqual(expect.any(Function));
+    expect(makeProxyFetchMock).toHaveBeenCalledWith("http://127.0.0.1:8080");
+    expect(requestClient.options?.fetch).toBe(makeProxyFetchMock.mock.results[0]?.value);
     expect(requestClient.customFetch).toBe(requestClient.options?.fetch);
   });
 
@@ -119,7 +120,7 @@ describe("createDiscordRestClient proxy support", () => {
     };
 
     expect(makeProxyFetchMock).toHaveBeenCalledWith("http://[::1]:8080");
-    expect(requestClient.options?.fetch).toEqual(expect.any(Function));
+    expect(requestClient.options?.fetch).toBe(makeProxyFetchMock.mock.results[0]?.value);
   });
 
   it("serializes multipart media with undici-compatible FormData for proxy fetches", async () => {
diff --git a/extensions/telegram/src/fetch.test.ts b/extensions/telegram/src/fetch.test.ts
index e4fab4bdc83..599206c6ce4 100644
--- a/extensions/telegram/src/fetch.test.ts
+++ b/extensions/telegram/src/fetch.test.ts
@@ -571,7 +571,8 @@ describe("resolveTelegramFetch", () => {
     );
   });
 
-  it("exports fallback dispatcher attempts for Telegram media downloads", () => {
+  it("exports fallback dispatcher attempts for Telegram media downloads", async () => {
+    undiciFetch.mockResolvedValueOnce({ ok: true } as Response);
     const transport = resolveTelegramTransport(undefined, {
       network: {
         autoSelectFamily: true,
@@ -579,7 +580,13 @@ describe("resolveTelegramFetch", () => {
       },
     });
 
-    expect(transport.sourceFetch).toEqual(expect.any(Function));
+    await expect(
+      transport.sourceFetch("https://api.telegram.org/botTOKEN/getFile"),
+    ).resolves.toEqual({ ok: true });
+    expect(undiciFetch).toHaveBeenCalledWith(
+      "https://api.telegram.org/botTOKEN/getFile",
+      undefined,
+    );
     expect(transport.fetch).not.toBe(transport.sourceFetch);
     expect(transport.dispatcherAttempts).toHaveLength(3);