diff --git a/cypress/integration/basic.js b/cypress/integration/basic.js
index 7d27b649f4ce..eb15cfe22340 100644
--- a/cypress/integration/basic.js
+++ b/cypress/integration/basic.js
@@ -1,5 +1,8 @@
 describe('Before setup instance', () => {
 	beforeEach(() => {
+		cy.window(win => {
+			win.indexedDB.deleteDatabase('keyval-store');
+		});
 		cy.request('POST', '/api/reset-db').as('reset');
 		cy.get('@reset').its('status').should('equal', 204);
 		cy.reload(true);
@@ -32,6 +35,9 @@ describe('Before setup instance', () => {
 
 describe('After setup instance', () => {
 	beforeEach(() => {
+		cy.window(win => {
+			win.indexedDB.deleteDatabase('keyval-store');
+		});
 		cy.request('POST', '/api/reset-db').as('reset');
 		cy.get('@reset').its('status').should('equal', 204);
 		cy.reload(true);
@@ -70,6 +76,9 @@ describe('After setup instance', () => {
 
 describe('After user signup', () => {
 	beforeEach(() => {
+		cy.window(win => {
+			win.indexedDB.deleteDatabase('keyval-store');
+		});
 		cy.request('POST', '/api/reset-db').as('reset');
 		cy.get('@reset').its('status').should('equal', 204);
 		cy.reload(true);
@@ -129,6 +138,9 @@ describe('After user signup', () => {
 
 describe('After user singed in', () => {
 	beforeEach(() => {
+		cy.window(win => {
+			win.indexedDB.deleteDatabase('keyval-store');
+		});
 		cy.request('POST', '/api/reset-db').as('reset');
 		cy.get('@reset').its('status').should('equal', 204);
 		cy.reload(true);
@@ -163,12 +175,10 @@ describe('After user singed in', () => {
 	});
 
   it('successfully loads', () => {
-    cy.visit('/');
+		cy.get('[data-cy-open-post-form]').should('be.visible');
   });
 
 	it('note', () => {
-    cy.visit('/');
-
 		cy.get('[data-cy-open-post-form]').click();
 		cy.get('[data-cy-post-form-text]').type('Hello, Misskey!');
 		cy.get('[data-cy-open-post-form-submit]').click();
diff --git a/packages/backend/src/misc/fetch-meta.ts b/packages/backend/src/misc/fetch-meta.ts
index 5417c1096278..e855ac28eef2 100644
--- a/packages/backend/src/misc/fetch-meta.ts
+++ b/packages/backend/src/misc/fetch-meta.ts
@@ -20,9 +20,16 @@ export async function fetchMeta(noCache = false): Promise<Meta> {
 			cache = meta;
 			return meta;
 		} else {
-			const saved = await transactionalEntityManager.save(Meta, {
-				id: 'x',
-			}) as Meta;
+			// metaが空のときfetchMetaが同時に呼ばれるとここが同時に呼ばれてしまうことがあるのでフェイルセーフなupsertを使う
+			const saved = await transactionalEntityManager
+				.upsert(
+					Meta,
+					{
+						id: 'x',
+					},
+					['id'],
+				)
+				.then((x) => transactionalEntityManager.findOneByOrFail(Meta, x.identifiers[0]));
 
 			cache = saved;
 			return saved;