diff --git a/packages/ai/test/github-copilot-anthropic-auth.test.ts b/packages/ai/test/github-copilot-anthropic-auth.test.ts
index 880436951..ecbd2ea44 100644
--- a/packages/ai/test/github-copilot-anthropic-auth.test.ts
+++ b/packages/ai/test/github-copilot-anthropic-auth.test.ts
@@ -1,6 +1,6 @@
 import { afterEach, describe, expect, it, vi } from "bun:test";
 import { buildAnthropicClientOptions, streamAnthropic } from "../src/providers/anthropic";
-import type { Model } from "../src/types";
+import type { Context, Model } from "../src/types";
 
 const originalFetch = global.fetch;
 
@@ -32,9 +32,9 @@ function makeCopilotClaudeModel(): Model<"anthropic-messages"> {
 	};
 }
 
-const testContext = {
+const testContext: Context = {
 	messages: [{ role: "user", content: "hello", timestamp: Date.now() }],
-} as const;
+};
 
 function getRequestHeader(
 	input: string | URL | Request,
diff --git a/packages/coding-agent/test/agent-session-auto-compaction-x-initiator.test.ts b/packages/coding-agent/test/agent-session-auto-compaction-x-initiator.test.ts
index fbb8bd4dc..61fbb28a4 100644
--- a/packages/coding-agent/test/agent-session-auto-compaction-x-initiator.test.ts
+++ b/packages/coding-agent/test/agent-session-auto-compaction-x-initiator.test.ts
@@ -1,6 +1,7 @@
 import { afterEach, beforeEach, describe, expect, it, mock, vi } from "bun:test";
 import * as path from "node:path";
 import { TempDir } from "@oh-my-pi/pi-utils";
+import type { AgentSession } from "../src/session/agent-session";
 
 const compactMock = vi.fn();
 
@@ -133,10 +134,7 @@ describe("AgentSession compaction Copilot initiator attribution", async () => {
 	}
 
 	async function triggerAutoCompaction(
-		session: {
-			agent: { emitExternalEvent: (event: unknown) => void };
-			subscribe: (listener: (event: { type: string }) => void) => () => void;
-		},
+		session: Pick<AgentSession, "agent" | "subscribe">,
 		model: { api: string; provider: string; id: string; contextWindow: number },
 	) {
 		const { promise, resolve } = Promise.withResolvers<void>();