diff --git a/packages/backend/src/types/global.d.ts b/packages/backend/src/types/global.d.ts
new file mode 100644
index 00000000..13fd2f46
--- /dev/null
+++ b/packages/backend/src/types/global.d.ts
@@ -0,0 +1,7 @@
+import { Knex } from 'knex';
+
+declare global {
+  declare namespace globalThis {
+    var knex: Knex;
+  }
+}
diff --git a/packages/backend/test/setup/global-hooks.ts b/packages/backend/test/setup/global-hooks.ts
index 704e1c8c..be1c2704 100644
--- a/packages/backend/test/setup/global-hooks.ts
+++ b/packages/backend/test/setup/global-hooks.ts
@@ -1,12 +1,11 @@
 import { client as knex } from '../../src/config/database';
-import { Knex } from 'knex';
 
 global.beforeAll(async () => {
-  (global as any).knex = knex as Knex;
+  global.knex = knex;
 });
 
 global.beforeEach(async function () {
-  this.transaction = await (global as any).knex.transaction();
+  this.transaction = await global.knex.transaction();
 });
 
 global.afterEach(async function () {
@@ -14,5 +13,5 @@ global.afterEach(async function () {
 });
 
 global.afterAll(async () => {
-  (global as any).knex.destroy();
+  global.knex.destroy();
 });