diff --git a/packages/tools/test/openai-middleware.unit.test.ts b/packages/tools/test/openai-middleware.unit.test.ts
index e3249c8d..ce04e1c0 100644
--- a/packages/tools/test/openai-middleware.unit.test.ts
+++ b/packages/tools/test/openai-middleware.unit.test.ts
@@ -26,7 +26,7 @@ describe("OpenAI middleware memory context", () => {
 				}),
 			}),
 		)
-		const originalCreate = vi.fn(() =>
+		const originalCreate = vi.fn((_body?: unknown) =>
 			Object.assign(Promise.resolve({ choices: [] }), {
 				asResponse: async () => new Response(),
 			}),
@@ -53,8 +53,11 @@ describe("OpenAI middleware memory context", () => {
 			],
 		})
 
-		const forwarded = originalCreate.mock.calls[0]?.[0]
-		const content = String(forwarded.messages[0].content)
+		const forwarded = originalCreate.mock.calls[0]?.[0] as
+			| { messages: Array<{ role: string; content: unknown }> }
+			| undefined
+		expect(forwarded).toBeDefined()
+		const content = String(forwarded?.messages[0]?.content)
 		expect(content).toContain("Be helpful.")
 		expect(content).toContain("Fresh profile fact")
 		expect(content).not.toContain("Stale profile fact")
diff --git a/packages/tools/test/voltagent.unit.test.ts b/packages/tools/test/voltagent.unit.test.ts
index 559f1fa1..4c9f8a8f 100644
--- a/packages/tools/test/voltagent.unit.test.ts
+++ b/packages/tools/test/voltagent.unit.test.ts
@@ -36,10 +36,13 @@ describe("VoltAgent memory context", () => {
 					parts: [],
 				},
 			],
-		} as Parameters<NonNullable<typeof hooks.onPrepareMessages>>[0]
+		} as unknown as Parameters<NonNullable<typeof hooks.onPrepareMessages>>[0]
 		const result = await hooks.onPrepareMessages?.(args)
 
-		const content = String(result?.messages?.[0]?.content ?? "")
+		const firstMessage = result?.messages?.[0] as
+			| Record<string, unknown>
+			| undefined
+		const content = String(firstMessage?.content ?? "")
 		expect(content).toContain("Be helpful.")
 		expect(content).toContain("Fresh profile fact")
 		expect(content).not.toContain("Stale profile fact")