diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bd86ec8..1c9c106 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -37,6 +37,7 @@ jobs:
       DISCORD_CLIENT_ID: "000000000000000000"
       DISCORD_GUILD_ID: "000000000000000000"
       BOT_DEVELOPER_ROLE_ID: "000000000000000000"
+      LOG_CHANNEL_ID: "000000000000000000"
       DATABASE_URL: "http://localhost:9120"
       NODE_ENV: test
     steps:
diff --git a/tests/lib/mod-log.test.ts b/tests/lib/mod-log.test.ts
new file mode 100644
index 0000000..c933278
--- /dev/null
+++ b/tests/lib/mod-log.test.ts
@@ -0,0 +1,65 @@
+import { afterAll, beforeEach, describe, expect, mock, test } from "bun:test";
+
+const warn = mock((_entry: unknown) => undefined);
+await mock.module("~/lib/logger", () => ({
+  log: { info: mock(() => undefined), warn, error: mock(() => undefined) },
+}));
+
+// A LOG_CHANNEL_ID is required to get past sendModLog's disabled guard. In the
+// full suite mod-log.ts is already cached with the real env, so CI sets a dummy
+// LOG_CHANNEL_ID; this mock covers isolated single-file runs. Restored in
+// afterAll so it can't leak into suites that read env directly.
+await mock.module("~/env", () => ({
+  env: {
+    DISCORD_TOKEN: "t",
+    DISCORD_CLIENT_ID: "c",
+    DISCORD_GUILD_ID: "g",
+    BOT_DEVELOPER_ROLE_ID: "dev-role",
+    DATABASE_URL: "db",
+    NODE_ENV: "test",
+    LOG_CHANNEL_ID: "log-chan",
+  },
+}));
+
+const { sendModLog } = await import("../../src/lib/mod-log");
+
+afterAll(() => {
+  mock.restore();
+});
+
+beforeEach(() => {
+  warn.mockClear();
+});
+
+const embed = {} as any;
+
+function fakeGuild(fetchImpl: () => Promise<unknown>) {
+  return { channels: { fetch: mock(fetchImpl) } } as any;
+}
+
+describe("sendModLog channel selection", () => {
+  test("warns channel_not_text when the resolved channel is not a text channel", async () => {
+    await sendModLog(
+      fakeGuild(async () => ({ type: 2 })),
+      embed,
+    );
+
+    expect(warn).toHaveBeenCalledTimes(1);
+    expect(warn.mock.calls[0]![0]).toMatchObject({
+      status: "channel_not_text",
+      resolved_type: 2,
+    });
+  });
+
+  test("warns fetch_failed when the channel fetch throws", async () => {
+    await sendModLog(
+      fakeGuild(async () => {
+        throw new Error("boom");
+      }),
+      embed,
+    );
+
+    expect(warn).toHaveBeenCalledTimes(1);
+    expect(warn.mock.calls[0]![0]).toMatchObject({ status: "fetch_failed" });
+  });
+});