diff --git a/test/index.js b/test/index.js
index 4a10891..4151f0a 100644
--- a/test/index.js
+++ b/test/index.js
@@ -122,15 +122,11 @@ describe('BIP39', function() {
   })
 
   describe('utf8 passwords', function() {
+    vectors.japanese.forEach(function(v, i) {
       it ('creates the correct seed', function() {
-          var mnemonic = "abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about"
-          // Note that mocha does not support string normalization, so this
-          // fails if just the utf8_password is used. This is a mocha problem,
-          // not the library problem.
-          var utf8_password = "㍍ガバヴァぱばぐゞちぢ十人十色"
-          var utf8_password_normalized = "メートルガバヴァぱばぐゞちぢ十人十色"
-          var seed = "ba553eedefe76e67e2602dc20184c564010859faada929a090dd2c57aacb204ceefd15404ab50ef3e8dbeae5195aeae64b0def4d2eead1cdc728a33ced520ffd"
-          assert.equal(BIP39.mnemonicToSeedHex(mnemonic, utf8_password_normalized), seed)
+        var utf8_password = "㍍ガバヴァぱばぐゞちぢ十人十色"
+        assert.equal(BIP39.mnemonicToSeedHex(v[1], utf8_password), v[2])
       })
+    })
   })
 })
diff --git a/test/vectors.json b/test/vectors.json
index aa45b53..052b638 100644
--- a/test/vectors.json
+++ b/test/vectors.json
@@ -132,5 +132,12 @@
       "b3y0nd 5tag3 5l33p cl1p b3cau53 tw15t t0k3n l3af at0m b3auty g3n1u5 f00d bu51n355 51d3 gr1d unabl3 m1ddl3 arm3d 0b53rv3 pa1r cr0uch t0n1ght away c0c0nut",
       "b15509eaa2d09d3efd3e006ef42151b30367dc6e3aa5e44caba3fe4d3e352e65101fbdb86a96776b91946ff06f8eac594dc6ee1d3e82a42dfe1b40fef6bcc3fd"
     ]
+  ],
+  "japanese": [
+    [
+      "00000000000000000000000000000000",
+      "abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about",
+      "ba553eedefe76e67e2602dc20184c564010859faada929a090dd2c57aacb204ceefd15404ab50ef3e8dbeae5195aeae64b0def4d2eead1cdc728a33ced520ffd"
+    ]
   ]
 }