diff --git a/cloudflare/test/github.test.ts b/cloudflare/test/github.test.ts
index ffa1d3d6..43c0a1e0 100644
--- a/cloudflare/test/github.test.ts
+++ b/cloudflare/test/github.test.ts
@@ -23,14 +23,11 @@ async function state() {
 
 beforeEach(async () => {
 	await env.DB.batch([
-		env.DB.prepare("DELETE FROM github_deliveries"),
-		env.DB.prepare("DELETE FROM github_projects"),
-		env.DB.prepare("DELETE FROM github_installations"),
 		env.DB.prepare(
-			"INSERT OR IGNORE INTO user(id,name,email,emailVerified,createdAt,updatedAt) VALUES('app-test','Tester','app-test@example.com',1,0,0)",
+			"INSERT INTO user(id,name,email,emailVerified,createdAt,updatedAt) VALUES('app-test','Tester','app-test@example.com',1,0,0)",
 		),
 		env.DB.prepare(
-			"INSERT OR IGNORE INTO account(id,accountId,providerId,userId,createdAt,updatedAt) VALUES('app-test-account','7','github','app-test',0,0)",
+			"INSERT INTO account(id,accountId,providerId,userId,createdAt,updatedAt) VALUES('app-test-account','7','github','app-test',0,0)",
 		),
 	]);
 });
diff --git a/cloudflare/test/inbox.test.ts b/cloudflare/test/inbox.test.ts
index 173be45f..4787a568 100644
--- a/cloudflare/test/inbox.test.ts
+++ b/cloudflare/test/inbox.test.ts
@@ -20,12 +20,6 @@ let github: Awaited<ReturnType<typeof maintainerOf>>["github"];
 let mock: Awaited<ReturnType<typeof maintainerOf>>["mock"];
 
 beforeEach(async () => {
-	await db.batch([
-		db.prepare("DELETE FROM jobs"),
-		db.prepare("DELETE FROM runners"),
-		db.prepare("DELETE FROM github_projects"),
-		db.prepare("DELETE FROM github_installations"),
-	]);
 	({ user, cookie, github, mock } = await maintainerOf());
 });
 afterEach(() => vi.restoreAllMocks());
diff --git a/cloudflare/test/jobs.test.ts b/cloudflare/test/jobs.test.ts
index 2ad09c2c..69891353 100644
--- a/cloudflare/test/jobs.test.ts
+++ b/cloudflare/test/jobs.test.ts
@@ -17,7 +17,7 @@ const testEnv = { ...env, GITHUB_APP_PRIVATE_KEY: privateKey };
 const db = env.DB;
 async function user(id: string) {
 	await db
-		.prepare("INSERT OR IGNORE INTO user(id,name,email,emailVerified,createdAt,updatedAt) VALUES(?,?,?,1,0,0)")
+		.prepare("INSERT INTO user(id,name,email,emailVerified,createdAt,updatedAt) VALUES(?,?,?,1,0,0)")
 		.bind(id, id, `${id}@example.test`)
 		.run();
 }
@@ -62,13 +62,6 @@ async function run(slots: Record<string, number>, now: number, owner = "owner",
 }
 
 beforeEach(async () => {
-	await db.batch([
-		db.prepare("DELETE FROM jobs"),
-		db.prepare("DELETE FROM runners"),
-		db.prepare("DELETE FROM github_projects"),
-		db.prepare("DELETE FROM github_installations"),
-		db.prepare("DELETE FROM output_cleanup"),
-	]);
 	await user("owner");
 	await user("other");
 	await project(10, "owner");
diff --git a/cloudflare/test/projects.test.ts b/cloudflare/test/projects.test.ts
index 8e86e8f3..3030386d 100644
--- a/cloudflare/test/projects.test.ts
+++ b/cloudflare/test/projects.test.ts
@@ -232,15 +232,12 @@ async function state() {
 
 beforeEach(async () => {
 	await env.DB.batch([
-		env.DB.prepare("DELETE FROM github_projects"),
-		env.DB.prepare("DELETE FROM github_installations"),
 		env.DB.prepare(
-			"INSERT OR IGNORE INTO user(id,name,email,emailVerified,createdAt,updatedAt) VALUES('enrollment-test','Maintainer','enrollment-test@example.test',1,0,0)",
+			"INSERT INTO user(id,name,email,emailVerified,createdAt,updatedAt) VALUES('enrollment-test','Maintainer','enrollment-test@example.test',1,0,0)",
 		),
 		env.DB.prepare(
-			"INSERT OR IGNORE INTO account(id,accountId,providerId,userId,createdAt,updatedAt) VALUES('enrollment-account','7007','github','enrollment-test',0,0)",
+			"INSERT INTO account(id,accountId,providerId,userId,createdAt,updatedAt) VALUES('enrollment-account','7007','github','enrollment-test',0,0)",
 		),
-		env.DB.prepare("UPDATE account SET accountId='7007' WHERE userId='enrollment-test'"),
 	]);
 });
 afterEach(() => vi.restoreAllMocks());
diff --git a/cloudflare/test/publish.test.ts b/cloudflare/test/publish.test.ts
index 0de46cbb..931ad6bc 100644
--- a/cloudflare/test/publish.test.ts
+++ b/cloudflare/test/publish.test.ts
@@ -152,16 +152,12 @@ async function job(id: string) {
 
 beforeEach(async () => {
 	await db.batch([
-		db.prepare("DELETE FROM jobs"),
-		db.prepare("DELETE FROM runners"),
-		db.prepare("DELETE FROM github_projects"),
-		db.prepare("DELETE FROM github_installations"),
 		db
-			.prepare("INSERT OR IGNORE INTO user(id,name,email,emailVerified,createdAt,updatedAt) VALUES(?,?,?,1,0,0)")
+			.prepare("INSERT INTO user(id,name,email,emailVerified,createdAt,updatedAt) VALUES(?,?,?,1,0,0)")
 			.bind(user, user, `${user}@example.test`),
 		db
 			.prepare(
-				"INSERT OR IGNORE INTO account(id,accountId,providerId,userId,createdAt,updatedAt) VALUES(?,?,'github',?,0,0)",
+				"INSERT INTO account(id,accountId,providerId,userId,createdAt,updatedAt) VALUES(?,?,'github',?,0,0)",
 			)
 			.bind(`${user}-account`, String(githubUser), user),
 		db
@@ -693,7 +689,7 @@ describe("runner publication", () => {
 		expect(blocked.status).toBe(202);
 		const question = (await job(id)).questions[0]!.id;
 		await db
-			.prepare("INSERT OR IGNORE INTO user(id,name,email,emailVerified,createdAt,updatedAt) VALUES(?,?,?,1,0,0)")
+			.prepare("INSERT INTO user(id,name,email,emailVerified,createdAt,updatedAt) VALUES(?,?,?,1,0,0)")
 			.bind("other", "other", "other@example.test")
 			.run();
 		const { resumed } = await store.answer(db, id, question, "other", "Keep going", Date.now());
diff --git a/cloudflare/test/push.test.ts b/cloudflare/test/push.test.ts
index bef392ba..ec0b6e24 100644
--- a/cloudflare/test/push.test.ts
+++ b/cloudflare/test/push.test.ts
@@ -126,12 +126,6 @@ describe("decision notifications", () => {
 	let respond: (input: RequestInfo | URL, init?: RequestInit) => Promise<Response>;
 
 	beforeEach(async () => {
-		await db.batch([
-			db.prepare("DELETE FROM push_subscriptions"),
-			db.prepare("DELETE FROM jobs"),
-			db.prepare("DELETE FROM runners"),
-			db.prepare("DELETE FROM github_projects"),
-		]);
 		const maintainer = await maintainerOf();
 		({ user, cookie, github } = maintainer);
 		sent = [];
diff --git a/cloudflare/test/runners.test.ts b/cloudflare/test/runners.test.ts
index fbf194c2..bcc58940 100644
--- a/cloudflare/test/runners.test.ts
+++ b/cloudflare/test/runners.test.ts
@@ -10,7 +10,6 @@ let cookie = "";
 let owner = "";
 
 beforeEach(async () => {
-	await db.prepare("DELETE FROM runners").run();
 	const who = identity("github");
 	cookie = (await oauth(who)).session!;
 	owner = (await db
@@ -68,7 +67,7 @@ describe("runner login", () => {
 
 	it("refuses a key another account already connected", async () => {
 		await db
-			.prepare("INSERT OR IGNORE INTO user(id,name,email,emailVerified,createdAt,updatedAt) VALUES(?,?,?,1,0,0)")
+			.prepare("INSERT INTO user(id,name,email,emailVerified,createdAt,updatedAt) VALUES(?,?,?,1,0,0)")
 			.bind("someone", "someone", "someone@example.test")
 			.run();
 		await store.registerRunner(db, "someone", "theirs", "linux", false, await key(), 0);
diff --git a/cloudflare/test/seed.test.ts b/cloudflare/test/seed.test.ts
index 8c4ad9f8..30d23b3a 100644
--- a/cloudflare/test/seed.test.ts
+++ b/cloudflare/test/seed.test.ts
@@ -20,12 +20,6 @@ afterEach(() => vi.restoreAllMocks());
  * returning it, a request helper, and the session cookie.
  */
 async function seeded(edit: (world: World) => void = () => {}) {
-	await db.batch([
-		db.prepare("DELETE FROM jobs"),
-		db.prepare("DELETE FROM runners"),
-		db.prepare("DELETE FROM github_projects"),
-		db.prepare("DELETE FROM github_installations"),
-	]);
 	const data = { ...world(), forks: env.GITHUB_FORK_OWNER };
 	edit(data);
 	vi.spyOn(globalThis, "fetch").mockImplementation(fakeGitHub(data));
diff --git a/cloudflare/test/setup.ts b/cloudflare/test/setup.ts
index 3ce27e0e..d7bc4656 100644
--- a/cloudflare/test/setup.ts
+++ b/cloudflare/test/setup.ts
@@ -1,3 +1,10 @@
-import { applyD1Migrations } from "cloudflare:test";
+import { applyD1Migrations, reset } from "cloudflare:test";
 import { env } from "cloudflare:workers";
-await applyD1Migrations(env.DB, env.TEST_MIGRATIONS);
+import { beforeEach } from "vitest";
+
+// Every test starts from empty, freshly migrated storage, so none depends on
+// rows, objects, or Durable Objects another test left behind.
+beforeEach(async () => {
+	await reset();
+	await applyD1Migrations(env.DB, env.TEST_MIGRATIONS);
+});
diff --git a/cloudflare/test/worker.test.ts b/cloudflare/test/worker.test.ts
index 816c5d45..005cc32b 100644
--- a/cloudflare/test/worker.test.ts
+++ b/cloudflare/test/worker.test.ts
@@ -120,8 +120,6 @@ describe("Worker", () => {
 			"/%5cevil.example",
 		].map((next) => [next, "/inbox"]),
 	])("returns to a local page after signing in: %j -> %j", async (next, expected) => {
-		// Better Auth stores each sign-in's callback with its OAuth state.
-		await env.DB.prepare("DELETE FROM verification").run();
 		const response = await SELF.fetch(`${origin}/sign-in`, {
 			method: "POST",
 			headers: { Origin: origin },
diff --git a/cloudflare/vitest.config.ts b/cloudflare/vitest.config.ts
index 5cc3f169..52f29a83 100644
--- a/cloudflare/vitest.config.ts
+++ b/cloudflare/vitest.config.ts
@@ -40,5 +40,13 @@ export default defineConfig({
 	// (the pool appends `import main` to cloudflare:test), all transformed by vitest's
 	// one Node process, which also answers a module resolve for every SELF.fetch.
 	// One shared runtime imports the Worker once, so a busy host can't stall the tests.
-	test: { setupFiles: ["./test/setup.ts"], fileParallelism: false, isolate: false },
+	// test/setup.ts resets storage before each test, and every run shuffles files and
+	// tests, so a test that depends on another's leftovers fails (rerun with the
+	// printed seed: `vitest run --sequence.seed=<seed>`).
+	test: {
+		setupFiles: ["./test/setup.ts"],
+		fileParallelism: false,
+		isolate: false,
+		sequence: { shuffle: true },
+	},
 });
diff --git a/quest/m0/README.md b/quest/m0/README.md
index 7e26660a..63ec49b0 100644
--- a/quest/m0/README.md
+++ b/quest/m0/README.md
@@ -35,7 +35,6 @@ ownership-manifest design:
 
 ## Required
 
-- [Worker tests](/quest/m0/worker-tests.md) - every Worker test passes alone and in any order
 - [Gate bench](/quest/m0/gate-bench.md) - measure headroom admission on an idle host
 - [Agent lifecycle integration](/quest/m0/worktree-agents.md) - reclaim completed and suspended checkouts through their harness
 - [Agent workflow helpers](/quest/m0/helpers/README.md) - CLI commands for CI waits, PR status, claims, quest moves, and serialized merges
diff --git a/quest/m0/worker-tests.md b/quest/m0/worker-tests.md
deleted file mode 100644
index 3932a516..00000000
--- a/quest/m0/worker-tests.md
+++ /dev/null
@@ -1,22 +0,0 @@
-# [S] Make every Worker test pass on its own
-
-## Goal
-
-Each Worker test (`cloudflare/test/`) passes when run alone, in any order, or
-in the full suite, because no test depends on D1 state another test left
-behind.
-
-## Plan
-
-Decided 2026-10-22 (user) as a follow-up of
-[kixelated/quest#188](https://github.com/kixelated/quest/pull/188):
-
-- A test in `cloudflare/test/publish.test.ts` passed in the full suite but
-  failed alone with a foreign-key error until it inserted its second user
-  itself, so D1 state leaks between tests in a full run.
-- Find how state is shared (per-file or per-suite storage, seeded rows,
-  module-level fixtures) and make each test set up what it needs, rather than
-  fixing tests one at a time as they surface.
-- Prove it by running each Worker test case alone (not just each file, since
-  tests in one file share state too) and the suite in a shuffled order, and
-  keep a check in CI that would catch a new order dependence.