diff --git a/packages/opencode/test/session/structured-output.test.ts b/packages/opencode/test/session/structured-output.test.ts
index 2be4257dc7..486bfdcd7d 100644
--- a/packages/opencode/test/session/structured-output.test.ts
+++ b/packages/opencode/test/session/structured-output.test.ts
@@ -1,6 +1,7 @@
 import { describe, expect, test } from "bun:test"
 import { MessageV2 } from "../../src/session/message-v2"
 import { SessionPrompt } from "../../src/session/prompt"
+import { SessionID } from "../../src/session/schema"
 
 describe("structured-output.OutputFormat", () => {
   test("parses text format", () => {
@@ -96,7 +97,7 @@ describe("structured-output.UserMessage", () => {
   test("user message accepts outputFormat", () => {
     const result = MessageV2.User.safeParse({
       id: "test-id",
-      sessionID: "test-session",
+      sessionID: SessionID.make("test-session"),
       role: "user",
       time: { created: Date.now() },
       agent: "default",
@@ -112,7 +113,7 @@ describe("structured-output.UserMessage", () => {
   test("user message works without outputFormat (optional)", () => {
     const result = MessageV2.User.safeParse({
       id: "test-id",
-      sessionID: "test-session",
+      sessionID: SessionID.make("test-session"),
       role: "user",
       time: { created: Date.now() },
       agent: "default",
@@ -125,7 +126,7 @@ describe("structured-output.UserMessage", () => {
 describe("structured-output.AssistantMessage", () => {
   const baseAssistantMessage = {
     id: "test-id",
-    sessionID: "test-session",
+    sessionID: SessionID.make("test-session"),
     role: "assistant" as const,
     parentID: "parent-id",
     modelID: "claude-3",