diff --git a/src/lib/database/index.ts b/src/lib/database.ts
similarity index 86%
rename from src/lib/database/index.ts
rename to src/lib/database.ts
index 14c04d0..cf24ce1 100644
--- a/src/lib/database/index.ts
+++ b/src/lib/database.ts
@@ -1,4 +1,3 @@
-import { dev } from '$app/environment';
 import { MIGRATIONS } from '$lib/migrations';
 import { IndexedDBCache } from '@agnosticeng/cache';
 import { MigrationManager } from '@agnosticeng/migrate';
@@ -10,7 +9,7 @@ const DB_NAME = 'sqlite-storage';
 const STORE_NAME = 'sqlite-data';
 const CACHE_KEY = 'db';
 
-class Database {
+export class Database {
 	private db = new SQLite();
 	private cache = new IndexedDBCache({ dbName: DB_NAME, storeName: STORE_NAME });
 	private migration = new MigrationManager(this.db);
@@ -39,11 +38,3 @@ class Database {
 		return this.db.exec(sql, bind);
 	}
 }
-
-export type { Database };
-export const db = new Database();
-
-if (dev) {
-	// @ts-ignore
-	window.db = db;
-}
diff --git a/src/lib/repositories/history.ts b/src/lib/repositories/history.ts
index 42c268d..638e064 100644
--- a/src/lib/repositories/history.ts
+++ b/src/lib/repositories/history.ts
@@ -1,4 +1,4 @@
-import { db, type Database } from '$lib/database';
+import type { Database } from '$lib/database';
 import dayjs from 'dayjs';
 import utc from 'dayjs/plugin/utc';
 
@@ -17,7 +17,7 @@ export interface HistoryRepository {
 	delete(id: HistoryEntry['id']): Promise<void>;
 }
 
-class SQLiteHistoryRepository implements HistoryRepository {
+export class SQLiteHistoryRepository implements HistoryRepository {
 	constructor(private db: Database) {}
 
 	async getAll(): Promise<HistoryEntry[]> {
@@ -63,5 +63,3 @@ class SQLiteHistoryRepository implements HistoryRepository {
 		await this.db.exec('DELETE FROM history WHERE id = ?', [id]);
 	}
 }
-
-export const historyRepository: HistoryRepository = new SQLiteHistoryRepository(db);
diff --git a/src/lib/repositories/queries.ts b/src/lib/repositories/queries.ts
index 8ae6cbe..8303b4b 100644
--- a/src/lib/repositories/queries.ts
+++ b/src/lib/repositories/queries.ts
@@ -1,4 +1,4 @@
-import { db, type Database } from '$lib/database';
+import type { Database } from '$lib/database';
 import dayjs from 'dayjs';
 import utc from 'dayjs/plugin/utc';
 
@@ -21,7 +21,7 @@ export interface QueryRepository {
 	delete(id: number): Promise<void>;
 }
 
-class SQLiteQueryRepository implements QueryRepository {
+export class SQLiteQueryRepository implements QueryRepository {
 	constructor(private db: Database) {}
 
 	async getAll(): Promise<Query[]> {
@@ -75,5 +75,3 @@ function row_to_query(row: Awaited<ReturnType<Database['exec']>>[number]): Query
 			.toDate()
 	};
 }
-
-export const queryRepository: QueryRepository = new SQLiteQueryRepository(db);
diff --git a/src/lib/repositories/tabs.ts b/src/lib/repositories/tabs.ts
index d4df801..b9b22aa 100644
--- a/src/lib/repositories/tabs.ts
+++ b/src/lib/repositories/tabs.ts
@@ -1,4 +1,4 @@
-import { db, type Database } from '$lib/database';
+import type { Database } from '$lib/database';
 
 export interface Tab {
 	id: string;
@@ -12,7 +12,7 @@ export interface TabRepository {
 	save(tabs: Tab[], activeIndex: number): Promise<void>;
 }
 
-class SQLiteTabRepository implements TabRepository {
+export class SQLiteTabRepository implements TabRepository {
 	constructor(private db: Database) {}
 
 	async get(): Promise<[tabs: Tab[], activeIndex: number]> {
@@ -51,5 +51,3 @@ function row_to_tab(row: Awaited<ReturnType<Database['exec']>>[number]): Tab {
 		query_id: row.query_id as number | undefined
 	};
 }
-
-export const tabRepository: TabRepository = new SQLiteTabRepository(db);
diff --git a/src/routes/+page.svelte b/src/routes/+page.svelte
index 5c095ea..380dd51 100644
--- a/src/routes/+page.svelte
+++ b/src/routes/+page.svelte
@@ -12,6 +12,7 @@
 	import TabComponent from '$lib/components/Tab.svelte';
 	import TimeCounter from '$lib/components/TimeCounter.svelte';
 	import { setAppContext } from '$lib/context';
+	import { Database } from '$lib/database';
 	import { FileDropEventManager } from '$lib/FileDropEventManager';
 	import Bars3 from '$lib/icons/Bars3.svelte';
 	import Bold from '$lib/icons/Bold.svelte';
@@ -25,15 +26,28 @@
 	import type { Table } from '$lib/olap-engine';
 	import { engine, type OLAPResponse } from '$lib/olap-engine';
 	import { PanelState } from '$lib/PanelState.svelte';
-	import { historyRepository, type HistoryEntry } from '$lib/repositories/history';
-	import { queryRepository, type Query } from '$lib/repositories/queries';
-	import { tabRepository, type Tab } from '$lib/repositories/tabs';
+	import {
+		SQLiteHistoryRepository,
+		type HistoryEntry,
+		type HistoryRepository
+	} from '$lib/repositories/history';
+	import {
+		SQLiteQueryRepository,
+		type Query,
+		type QueryRepository
+	} from '$lib/repositories/queries';
+	import { SQLiteTabRepository, type Tab, type TabRepository } from '$lib/repositories/tabs';
 	import { IndexedDBCache } from '@agnosticeng/cache';
 	import { SplitPane } from '@rich_harris/svelte-split-pane';
 	import debounce from 'p-debounce';
 	import { format } from 'sql-formatter';
 	import { tick, type ComponentProps } from 'svelte';
 
+	const db = new Database();
+	const historyRepository: HistoryRepository = new SQLiteHistoryRepository(db);
+	const queryRepository: QueryRepository = new SQLiteQueryRepository(db);
+	const tabRepository: TabRepository = new SQLiteTabRepository(db);
+
 	let response = $state.raw<OLAPResponse>();
 	let loading = $state(false);
 	let counter = $state<ReturnType<typeof TimeCounter>>();