diff --git a/packages/better-auth/src/auth/minimal.test.ts b/packages/better-auth/src/auth/minimal.test.ts
index a8fb6339ee..427c01af56 100644
--- a/packages/better-auth/src/auth/minimal.test.ts
+++ b/packages/better-auth/src/auth/minimal.test.ts
@@ -1,5 +1,5 @@
 import { memoryAdapter } from "@better-auth/memory-adapter";
-import Database from "better-sqlite3";
+import { DatabaseSync } from "node:sqlite";
 import { describe, expect, expectTypeOf, it } from "vitest";
 import type { Auth } from "../types";
 import { betterAuth } from "./minimal";
@@ -55,7 +55,7 @@ describe("auth-minimal", () => {
 	});
 
 	it("should throw error with direct database connection (Kysely required)", async () => {
-		const sqliteDB = new Database(":memory:");
+		const sqliteDB = new DatabaseSync(":memory:");
 
 		const auth = betterAuth({
 			baseURL: "http://localhost:3000",
diff --git a/packages/better-auth/src/context/create-context.test.ts b/packages/better-auth/src/context/create-context.test.ts
index a926f1894f..fd285d03fd 100644
--- a/packages/better-auth/src/context/create-context.test.ts
+++ b/packages/better-auth/src/context/create-context.test.ts
@@ -1,4 +1,4 @@
-import Database from "better-sqlite3";
+import { DatabaseSync } from "node:sqlite";
 import { describe, expect, it, vi } from "vitest";
 import { createAuthEndpoint } from "../api";
 import { getAdapter } from "../db/adapter-kysely";
@@ -286,7 +286,7 @@ describe("base context creation", () => {
 
 		it("should return false for cookieRefreshCache when undefined", async () => {
 			const res = await initBase({
-				database: new Database(":memory:"),
+				database: new DatabaseSync(":memory:"),
 			});
 			expect(res.sessionConfig.cookieRefreshCache).toBe(false);
 		});
@@ -329,7 +329,7 @@ describe("base context creation", () => {
 					level: "warn",
 					log,
 				} as any,
-				database: new Database(":memory:"),
+				database: new DatabaseSync(":memory:"),
 				session: {
 					cookieCache: {
 						refreshCache: true,
@@ -1298,7 +1298,7 @@ describe("base context creation", () => {
 					level: "warn",
 					log,
 				} as any,
-				database: new Database(":memory:"),
+				database: new DatabaseSync(":memory:"),
 				session: {
 					cookieCache: {
 						refreshCache: true,
diff --git a/packages/better-auth/src/context/init.test.ts b/packages/better-auth/src/context/init.test.ts
index 0fd8ef3c66..4ec2563f51 100644
--- a/packages/better-auth/src/context/init.test.ts
+++ b/packages/better-auth/src/context/init.test.ts
@@ -1,9 +1,9 @@
-import Database from "better-sqlite3";
+import { DatabaseSync } from "node:sqlite";
 import { describe, expect, it } from "vitest";
 import { init } from "./init";
 
 describe("init (with Kysely)", () => {
-	const database = new Database(":memory:");
+	const database = new DatabaseSync(":memory:");
 
 	it("should initialize with Kysely adapter", async () => {
 		const res = await init({
diff --git a/packages/better-auth/src/db/internal-adapter.test.ts b/packages/better-auth/src/db/internal-adapter.test.ts
index e3d8687654..084e2512dc 100644
--- a/packages/better-auth/src/db/internal-adapter.test.ts
+++ b/packages/better-auth/src/db/internal-adapter.test.ts
@@ -1,7 +1,5 @@
 import type { GenericEndpointContext } from "@better-auth/core";
 import { safeJSONParse } from "@better-auth/core/utils/json";
-import Database from "better-sqlite3";
-import { Kysely, SqliteDialect } from "kysely";
 import { afterEach, beforeAll, describe, expect, it, vi } from "vitest";
 import { betterAuth } from "../auth/full";
 import { init } from "../context/init";
@@ -13,11 +11,9 @@ import type {
 	User,
 } from "../types";
 import { getMigrations } from "./get-migration";
+import { DatabaseSync } from 'node:sqlite'
 
 describe("internal adapter test", async () => {
-	const sqliteDialect = new SqliteDialect({
-		database: new Database(":memory:"),
-	});
 	const map = new Map();
 	const expirationMap = new Map();
 	let id = 1;
@@ -30,10 +26,7 @@ describe("internal adapter test", async () => {
 	const pluginHookUserCreateBefore = vi.fn();
 	const pluginHookUserCreateAfter = vi.fn();
 	const opts = {
-		database: {
-			dialect: sqliteDialect,
-			type: "sqlite",
-		},
+		database: new DatabaseSync(":memory:"),
 		user: {
 			fields: {
 				email: "email_address",
@@ -270,30 +263,19 @@ describe("internal adapter test", async () => {
 		};
 		const hookUserCreateAfter = vi.fn();
 
-		const dialect = new SqliteDialect({
-			database: new Database(":memory:"),
-		});
+		const database = new DatabaseSync(":memory:")
 
-		const db = new Kysely<any>({
-			dialect,
-		});
-
-		const opts: BetterAuthOptions = {
-			database: {
-				dialect,
-				type: "sqlite",
-			},
+		const opts = {
+			database,
 			databaseHooks: {
 				user: {
 					create: {
 						async after(user, context) {
 							hookUserCreateAfter(user, context);
 
-							const userFromDb: any = await db
-								.selectFrom("user")
-								.selectAll()
-								.where("id", "=", user.id)
-								.executeTakeFirst();
+							const userFromDb = database
+							.prepare('SELECT * FROM user WHERE id = ?')
+							.get(user.id)!;
 
 							expect(user.id).toBe(userFromDb.id);
 							expect(user.name).toBe(userFromDb.name);
@@ -303,10 +285,10 @@ describe("internal adapter test", async () => {
 								Boolean(userFromDb.emailVerified),
 							);
 							expect(user.createdAt).toStrictEqual(
-								new Date(userFromDb.createdAt),
+								new Date(userFromDb.createdAt as string),
 							);
 							expect(user.updatedAt).toStrictEqual(
-								new Date(userFromDb.updatedAt),
+								new Date(userFromDb.updatedAt as string),
 							);
 						},
 					},
@@ -339,12 +321,7 @@ describe("internal adapter test", async () => {
 		const capturedTTLs: number[] = [];
 
 		const testOpts = {
-			database: {
-				dialect: new SqliteDialect({
-					database: new Database(":memory:"),
-				}),
-				type: "sqlite",
-			},
+			database: new DatabaseSync(":memory:"),
 			secondaryStorage: {
 				set(key: string, value: string, ttl?: number | undefined) {
 					if (ttl !== undefined) {
@@ -645,16 +622,8 @@ describe("internal adapter test", async () => {
 		const testMap = new Map<string, string>();
 		const testExpirationMap = new Map<string, number>();
 
-		const testDb = new Database(":memory:");
-		const testSqliteDialect = new SqliteDialect({
-			database: testDb,
-		});
-
 		const testOpts = {
-			database: {
-				dialect: testSqliteDialect,
-				type: "sqlite",
-			},
+			database: new DatabaseSync(":memory:"),
 			secondaryStorage: {
 				set(key: string, value: string, ttl?: number) {
 					testMap.set(key, value);
@@ -752,23 +721,14 @@ describe("internal adapter test", async () => {
 		expect(updatedTTL).toBeDefined();
 		expect(updatedTTL! - expectedTTL).toBeLessThanOrEqual(1);
 		expect(updatedTTL! - expectedTTL).toBeGreaterThanOrEqual(0);
-
-		// Clean up DB
-		testDb.close();
 	});
 
 	it("should deduplicate sessions when active-sessions list contains duplicates", async () => {
-		const testDb = new Database(":memory:");
-		const testDialect = new SqliteDialect({ database: testDb });
-
 		const testMap = new Map<string, string>();
 		const testExpirationMap = new Map<string, number>();
 
 		const testOpts = {
-			database: {
-				dialect: testDialect,
-				type: "sqlite",
-			},
+			database: new DatabaseSync(":memory:"),
 			secondaryStorage: {
 				set(key: string, value: string, ttl?: number) {
 					testMap.set(key, value);
@@ -823,8 +783,5 @@ describe("internal adapter test", async () => {
 		// listSessions should deduplicate and return only unique sessions
 		const sessions = await testInternalAdapter.listSessions(user.id);
 		expect(sessions.length).toBe(1);
-
-		// Clean up DB
-		testDb.close();
 	});
 });
diff --git a/packages/better-auth/src/social.test.ts b/packages/better-auth/src/social.test.ts
index 5be3f6cd40..463b8d540c 100644
--- a/packages/better-auth/src/social.test.ts
+++ b/packages/better-auth/src/social.test.ts
@@ -6,7 +6,7 @@ import type {
 	VercelProfile,
 } from "@better-auth/core/social-providers";
 import { betterFetch } from "@better-fetch/fetch";
-import Database from "better-sqlite3";
+import { DatabaseSync } from "node:sqlite";
 import { HttpResponse, http } from "msw";
 import { setupServer } from "msw/node";
 import { OAuth2Server } from "oauth2-mock-server";
@@ -614,7 +614,7 @@ describe("Disable signup", async () => {
 });
 
 describe("signin", async () => {
-	const database = new Database(":memory:");
+	const database = new DatabaseSync(":memory:");
 
 	beforeAll(async () => {
 		const migrations = await getMigrations({
diff --git a/packages/better-auth/src/test-utils/test-instance.ts b/packages/better-auth/src/test-utils/test-instance.ts
index 7b6d66c908..76fdc2f816 100644
--- a/packages/better-auth/src/test-utils/test-instance.ts
+++ b/packages/better-auth/src/test-utils/test-instance.ts
@@ -61,8 +61,8 @@ export async function getTestInstance<
 	}
 
 	async function getSqlite() {
-		const { default: Database } = await import("better-sqlite3");
-		return new Database(":memory:");
+		const { DatabaseSync } = await import("node:sqlite");
+		return new DatabaseSync(":memory:");
 	}
 
 	async function getMysql() {