diff --git a/src/resources/extensions/gsd/tests/git-service.test.ts b/src/resources/extensions/gsd/tests/git-service.test.ts
index 88809f709..cd7168ada 100644
--- a/src/resources/extensions/gsd/tests/git-service.test.ts
+++ b/src/resources/extensions/gsd/tests/git-service.test.ts
@@ -533,7 +533,7 @@ describe('git-service', async () => {
 
     // Auto-commit with .gsd/ excluded (simulates pre-switch)
     const msg = svc.autoCommit("pre-switch", "main", [".gsd/"]);
-    assert.deepStrictEqual(msg, "chore(main): auto-commit after pre-switch", "pre-switch autoCommit with .gsd/ exclusion commits");
+    assert.deepStrictEqual(msg, "chore: auto-commit after pre-switch\n\nGSD-Unit: main", "pre-switch autoCommit with .gsd/ exclusion commits");
 
     // Verify .gsd/ file was NOT committed
     const show = run("git show --stat HEAD", repo);
diff --git a/src/resources/extensions/gsd/tests/parallel-merge.test.ts b/src/resources/extensions/gsd/tests/parallel-merge.test.ts
index 9283a64c5..ec943e0a8 100644
--- a/src/resources/extensions/gsd/tests/parallel-merge.test.ts
+++ b/src/resources/extensions/gsd/tests/parallel-merge.test.ts
@@ -281,9 +281,9 @@ test("mergeCompletedMilestone — clean merge, session status cleaned up", async
     // Verify file merged to main
     assert.ok(existsSync(join(repo, "auth.ts")), "auth.ts should be on main");
 
-    // Verify commit on main
-    const log = run("git log --oneline main", repo);
-    assert.ok(log.includes("M010"), "commit message should reference M010");
+    // Verify commit on main (M010 is now in the body as a GSD-Milestone trailer)
+    const log = run("git log -1 --format=%B main", repo);
+    assert.ok(log.includes("GSD-Milestone: M010"), "commit message should reference M010 in trailer");
 
     // Verify session status cleaned up
     const statusAfter = readSessionStatus(repo, "M010");