diff --git a/cypress/integration/basic.js b/cypress/integration/basic.js
index 7d27b649f..eb15cfe22 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 5417c1096..e855ac28e 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;