diff --git a/test/client/configs.test.ts b/test/client/configs.test.ts
new file mode 100644
index 0000000..a9a1000
--- /dev/null
+++ b/test/client/configs.test.ts
@@ -0,0 +1,14 @@
+import {
+  getFallbackLocale,
+  getLoadingDelay,
+  getFormats,
+  configure,
+} from '../../src/client/configs'
+
+test('configures the fallback locale', () => {
+  expect(getFallbackLocale()).toBe(null)
+  configure({
+    fallbackLocale: 'en',
+  })
+  expect(getFallbackLocale()).toBe('en')
+})