diff --git a/packages/backend/jest.config.e2e.ts b/packages/backend/jest.config.e2e.ts
index 0a0bb85faa..3a77ad02b6 100644
--- a/packages/backend/jest.config.e2e.ts
+++ b/packages/backend/jest.config.e2e.ts
@@ -8,7 +8,7 @@ import base from './jest.config.common.ts';
 export default {
 	...base,
 	globalSetup: "<rootDir>/built-test/entry.js",
-	setupFilesAfterEnv: ["<rootDir>/test/jest.setup.e2e.ts"],
+	setupFilesAfterEnv: ["<rootDir>/test/jest.setup.e2e.mjs"],
 	testMatch: [
 		"<rootDir>/test/e2e/**/*.ts",
 	],
diff --git a/packages/backend/jest.config.unit.ts b/packages/backend/jest.config.unit.ts
index b850fa674a..42dd6bfe96 100644
--- a/packages/backend/jest.config.unit.ts
+++ b/packages/backend/jest.config.unit.ts
@@ -7,7 +7,7 @@ import base from './jest.config.common.ts';
 
 export default {
 	...base,
-	globalSetup: '<rootDir>/test/jest.setup.unit.ts',
+	globalSetup: '<rootDir>/test/jest.setup.unit.mjs',
 	testMatch: [
 		"<rootDir>/test/unit/**/*.ts",
 		"<rootDir>/src/**/*.test.ts",
diff --git a/packages/backend/test/eslint.config.js b/packages/backend/test/eslint.config.js
index 54c14e92a4..e80ff0cbe9 100644
--- a/packages/backend/test/eslint.config.js
+++ b/packages/backend/test/eslint.config.js
@@ -36,6 +36,7 @@ export default [
 		ignores: [
 			"**/built/",
 			'*.*',
+			"**/jest.setup.*"
 		],
 	},
 ];
diff --git a/packages/backend/test/jest.setup.e2e.ts b/packages/backend/test/jest.setup.e2e.mjs
similarity index 100%
rename from packages/backend/test/jest.setup.e2e.ts
rename to packages/backend/test/jest.setup.e2e.mjs
diff --git a/packages/backend/test/jest.setup.unit.ts b/packages/backend/test/jest.setup.unit.mjs
similarity index 100%
rename from packages/backend/test/jest.setup.unit.ts
rename to packages/backend/test/jest.setup.unit.mjs