diff --git a/test/unit.js b/test/unit.js
index 94a9f9c..10670c5 100644
--- a/test/unit.js
+++ b/test/unit.js
@@ -4,3 +4,7 @@ import bip39v from '..';
 test('bip39v is exported', t => {
 	t.not(bip39v, undefined);
 });
+
+test('bip39v.generateMnemonic() defaults to 12 words', t => {
+	t.is(bip39v.generateMnemonic().split(' ').length, 12);
+});