diff --git a/test/address.js b/test/address.js
index 6475ebb..0384732 100644
--- a/test/address.js
+++ b/test/address.js
@@ -3,8 +3,8 @@ var Address = require('../src/address')
 var networks = require('../src/networks')
 var Script = require('../src/script')
 
-var b58fixtures = require('./fixtures/base58')
-var fixtures = require('./fixtures/address')
+var b58fixtures = require('./fixtures/base58.json')
+var fixtures = require('./fixtures/address.json')
 
 function h2b(h) { return new Buffer(h, 'hex') }
 
diff --git a/test/base58.js b/test/base58.js
index 206425b..603a88f 100644
--- a/test/base58.js
+++ b/test/base58.js
@@ -1,9 +1,7 @@
 var assert = require('assert')
 var base58 = require('../src/base58')
-var fixtures = require('./fixtures/base58')
 
-function b2h(b) { return new Buffer(b).toString('hex') }
-function h2b(h) { return new Buffer(h, 'hex') }
+var fixtures = require('./fixtures/base58.json')
 
 describe('base58', function() {
   describe('decode', function() {
@@ -12,7 +10,7 @@ describe('base58', function() {
         var actual = base58.decode(f.string)
         var expected = f.hex
 
-        assert.strictEqual(b2h(actual), expected)
+        assert.strictEqual(actual.toString('hex'), expected)
       })
     })
 
@@ -28,7 +26,7 @@ describe('base58', function() {
   describe('encode', function() {
     it('can encode Bitcoin core test data', function() {
       fixtures.valid.forEach(function(f) {
-        var actual = base58.encode(h2b(f.hex))
+        var actual = base58.encode(new Buffer(f.hex, 'hex'))
         var expected = f.string.trim()
 
         assert.strictEqual(actual, expected)
diff --git a/test/base58check.js b/test/base58check.js
index a4940be..b37db78 100644
--- a/test/base58check.js
+++ b/test/base58check.js
@@ -1,6 +1,7 @@
 var assert = require('assert')
 var base58check = require('../src/base58check')
-var fixtures = require('./fixtures/base58check')
+
+var fixtures = require('./fixtures/base58check.json')
 
 function b2h(b) { return new Buffer(b).toString('hex') }
 function h2b(h) { return new Buffer(h, 'hex') }
diff --git a/test/bufferutils.js b/test/bufferutils.js
index 382c8ff..97a4007 100644
--- a/test/bufferutils.js
+++ b/test/bufferutils.js
@@ -1,7 +1,7 @@
 var assert = require('assert')
 var bufferutils = require('../src/bufferutils')
 
-var fixtures = require('./fixtures/buffer.js')
+var fixtures = require('./fixtures/buffer.json')
 
 describe('bufferutils', function() {
   describe('readUInt64LE', function() {
diff --git a/test/crypto.js b/test/crypto.js
index e5ca84e..361468d 100644
--- a/test/crypto.js
+++ b/test/crypto.js
@@ -1,7 +1,7 @@
 var assert = require('assert')
 var crypto = require('../src/crypto')
 
-var fixtures = require('./fixtures/crypto')
+var fixtures = require('./fixtures/crypto.json')
 
 describe('Crypto', function() {
   describe('HASH160', function() {
diff --git a/test/ec.js b/test/ec.js
index f9aa100..a166bde 100644
--- a/test/ec.js
+++ b/test/ec.js
@@ -6,7 +6,7 @@ var ecparams = sec('secp256k1')
 var BigInteger = require('bigi')
 var ECPointFp = require('../src/ec').ECPointFp
 
-var fixtures = require('./fixtures/ec.js')
+var fixtures = require('./fixtures/ec.json')
 
 describe('ec', function() {
   describe('ECPointFp', function() {
diff --git a/test/ecdsa.js b/test/ecdsa.js
index 48ed5b8..8e53881 100644
--- a/test/ecdsa.js
+++ b/test/ecdsa.js
@@ -8,10 +8,8 @@ var sec = require('../src/sec')
 var ecparams = sec("secp256k1")
 
 var BigInteger = require('bigi')
-var ECKey = require('../src/eckey')
-var ECPubKey = require('../src/ecpubkey')
 
-var fixtures = require('./fixtures/ecdsa.js')
+var fixtures = require('./fixtures/ecdsa.json')
 
 describe('ecdsa', function() {
   describe('deterministicGenerateK', function() {
diff --git a/test/eckey.js b/test/eckey.js
index 9b4a696..80afec4 100644
--- a/test/eckey.js
+++ b/test/eckey.js
@@ -4,7 +4,7 @@ var crypto = require('../src/crypto')
 var BigInteger = require('bigi')
 var ECKey = require('../src/eckey')
 
-var fixtures = require('./fixtures/eckey')
+var fixtures = require('./fixtures/eckey.json')
 var networks = require('../src/networks')
 
 describe('ECKey', function() {
diff --git a/test/ecpubkey.js b/test/ecpubkey.js
index c7aefd8..00f51ff 100644
--- a/test/ecpubkey.js
+++ b/test/ecpubkey.js
@@ -7,7 +7,7 @@ var BigInteger = require('bigi')
 var ECPointFp = require('../src/ec').ECPointFp
 var ECPubKey = require('../src/ecpubkey')
 
-var fixtures = require('./fixtures/ecpubkey')
+var fixtures = require('./fixtures/ecpubkey.json')
 
 describe('ECPubKey', function() {
   var Q
diff --git a/test/fixtures/address.js b/test/fixtures/address.json
similarity index 98%
rename from test/fixtures/address.js
rename to test/fixtures/address.json
index d9e351e..42e8f41 100644
--- a/test/fixtures/address.js
+++ b/test/fixtures/address.json
@@ -1,4 +1,4 @@
-module.exports = {
+{
   "valid": [
     {
       "description": "pubKeyHash",
@@ -42,4 +42,4 @@ module.exports = {
       }
     ]
   }
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/base58.js b/test/fixtures/base58.json
similarity index 98%
rename from test/fixtures/base58.js
rename to test/fixtures/base58.json
index 761d446..a9b3705 100644
--- a/test/fixtures/base58.js
+++ b/test/fixtures/base58.json
@@ -1,4 +1,4 @@
-module.exports = {
+{
   "valid": [
     {
       "hex": "",
diff --git a/test/fixtures/base58check.js b/test/fixtures/base58check.json
similarity index 99%
rename from test/fixtures/base58check.js
rename to test/fixtures/base58check.json
index cf0781d..ef37f5f 100644
--- a/test/fixtures/base58check.js
+++ b/test/fixtures/base58check.json
@@ -1,4 +1,4 @@
-module.exports = {
+{
   "valid": [
     {
       "string": "1AGNa15ZQXAZUgFiqJ2i7Z2DPU2J6hW62i",
@@ -475,4 +475,4 @@ module.exports = {
     "Ky1YjoZNgQ196HJV3HpdkecfhRBmRZdMJk89Hi5KGfpfPwS2bUbfd",
     "2A1q1YsMZowabbvta7kTy2Fd6qN4r5ZCeG3qLpvZBMzCixMUdkN2Y4dHB1wPsZAeVXUGD83MfRED"
   ]
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/buffer.js b/test/fixtures/buffer.json
similarity index 98%
rename from test/fixtures/buffer.js
rename to test/fixtures/buffer.json
index 7de5381..268a92d 100644
--- a/test/fixtures/buffer.js
+++ b/test/fixtures/buffer.json
@@ -1,4 +1,4 @@
-module.exports = {
+{
   "valid": [
     {
       "dec": 0,
diff --git a/test/fixtures/crypto.js b/test/fixtures/crypto.js
deleted file mode 100644
index a89ac4a..0000000
--- a/test/fixtures/crypto.js
+++ /dev/null
@@ -1,50 +0,0 @@
-module.exports = {
-  before: {
-    secret: 'vires is numeris',
-    hex: [
-      '0000000000000001',
-      '0101010101010101',
-      'FFFFFFFFFFFFFFFF',
-      '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'
-    ],
-  },
-
-  after: {
-    hash160: [
-      'cdb00698f02afd929ffabea308340fa99ac2afa8',
-      'abaf1119f83e384210fe8e222eac76e2f0da39dc',
-      'f86221f5a1fca059a865c0b7d374dfa9d5f3aeb4',
-      '9763e6b367c363bd6b88a7b361c98e6beee243a5'
-    ],
-    hash256: [
-      '3ae5c198d17634e79059c2cd735491553d22c4e09d1d9fea3ecf214565df2284',
-      '728338d99f356175c4945ef5cccfa61b7b56143cbbf426ddd0e0fc7cfe8c3c23',
-      '752adad0a7b9ceca853768aebb6965eca126a62965f698a0c1bc43d83db632ad',
-      '033588797115feb3545052670cac2a46584ab3cb460de63756ee0275e66b5799'
-    ],
-    sha1: [
-      'cb473678976f425d6ec1339838f11011007ad27d',
-      'c0357a32ed1f6a03be92dd094476f7f1a2e214ec',
-      'be673e8a56eaa9d8c1d35064866701c11ef8e089',
-      '10d96fb43aca84e342206887bbeed3065d4e4344'
-    ],
-    sha256: [
-      'cd2662154e6d76b2b2b92e70c0cac3ccf534f9b74eb5b89819ec509083d00a50',
-      '04abc8821a06e5a30937967d11ad10221cb5ac3b5273e434f1284ee87129a061',
-      '12a3ae445661ce5dee78d0650d33362dec29c4f82af05e7e57fb595bbbacf0ca',
-      'a7fb8276035057ed6479c5f2305a96da100ac43f0ac10f277e5ab8c5457429da'
-    ],
-    hmacsha256: [
-      '73442dc8dd7f71a106a20fddd49d31856b1db12956c75070c8186b0b3eb71251',
-      '7204c72af7c73f5e84447a752dc8a2708f91b896f29de5fcf4b7f42f13a30c6e',
-      'a03c2ac6e9ca86678b5608a3d8682de46d17026f5fac4fd7147d2e5022061833',
-      'a780cd6e5c29cf11f756536ea5779992687c1b3b5e37f31b027a392d94e91fb8'
-    ],
-    hmacsha512: [
-      '4c0595aed1f5d066ea9f797727c060eb86cb55ff29d4d4fd2cd0ad3a012386763aea604c030619c79aa7fd8d03cda1b73a9ebd17906a3d2a350108d1a98b24ac',
-      'f80b90d63b804b3d2ab03b9bfb3ac94ee271352eb8bddfb6b4f5cf2a4fc9176acea35f517728e64943d1eb8af1e4674a114082c81bc8874d88b408b3b406d6a4',
-      '134cf60c30a5cd412c7a5cd6c3f878279e139b47c19550b7456fa137fbf90e580ae0a923a22052f42ec801ac658db32821e271161b563eac4926285ba6b8f410',
-      '7dee95aa3c462d3eb7ecb61536cb215e471d1fa73d8643a967905946e26c536588c5058abd5a049a22b987db95a7fb420f3bff12359dc53d03d7ce7df714e029'
-    ]
-  }
-}
diff --git a/test/fixtures/crypto.json b/test/fixtures/crypto.json
new file mode 100644
index 0000000..2db8e2d
--- /dev/null
+++ b/test/fixtures/crypto.json
@@ -0,0 +1,50 @@
+{
+  "before": {
+    "secret": "vires is numeris",
+    "hex": [
+      "0000000000000001",
+      "0101010101010101",
+      "FFFFFFFFFFFFFFFF",
+      "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"
+    ]
+  },
+
+  "after": {
+    "hash160": [
+      "cdb00698f02afd929ffabea308340fa99ac2afa8",
+      "abaf1119f83e384210fe8e222eac76e2f0da39dc",
+      "f86221f5a1fca059a865c0b7d374dfa9d5f3aeb4",
+      "9763e6b367c363bd6b88a7b361c98e6beee243a5"
+    ],
+    "hash256": [
+      "3ae5c198d17634e79059c2cd735491553d22c4e09d1d9fea3ecf214565df2284",
+      "728338d99f356175c4945ef5cccfa61b7b56143cbbf426ddd0e0fc7cfe8c3c23",
+      "752adad0a7b9ceca853768aebb6965eca126a62965f698a0c1bc43d83db632ad",
+      "033588797115feb3545052670cac2a46584ab3cb460de63756ee0275e66b5799"
+    ],
+    "sha1": [
+      "cb473678976f425d6ec1339838f11011007ad27d",
+      "c0357a32ed1f6a03be92dd094476f7f1a2e214ec",
+      "be673e8a56eaa9d8c1d35064866701c11ef8e089",
+      "10d96fb43aca84e342206887bbeed3065d4e4344"
+    ],
+    "sha256": [
+      "cd2662154e6d76b2b2b92e70c0cac3ccf534f9b74eb5b89819ec509083d00a50",
+      "04abc8821a06e5a30937967d11ad10221cb5ac3b5273e434f1284ee87129a061",
+      "12a3ae445661ce5dee78d0650d33362dec29c4f82af05e7e57fb595bbbacf0ca",
+      "a7fb8276035057ed6479c5f2305a96da100ac43f0ac10f277e5ab8c5457429da"
+    ],
+    "hmacsha256": [
+      "73442dc8dd7f71a106a20fddd49d31856b1db12956c75070c8186b0b3eb71251",
+      "7204c72af7c73f5e84447a752dc8a2708f91b896f29de5fcf4b7f42f13a30c6e",
+      "a03c2ac6e9ca86678b5608a3d8682de46d17026f5fac4fd7147d2e5022061833",
+      "a780cd6e5c29cf11f756536ea5779992687c1b3b5e37f31b027a392d94e91fb8"
+    ],
+    "hmacsha512": [
+      "4c0595aed1f5d066ea9f797727c060eb86cb55ff29d4d4fd2cd0ad3a012386763aea604c030619c79aa7fd8d03cda1b73a9ebd17906a3d2a350108d1a98b24ac",
+      "f80b90d63b804b3d2ab03b9bfb3ac94ee271352eb8bddfb6b4f5cf2a4fc9176acea35f517728e64943d1eb8af1e4674a114082c81bc8874d88b408b3b406d6a4",
+      "134cf60c30a5cd412c7a5cd6c3f878279e139b47c19550b7456fa137fbf90e580ae0a923a22052f42ec801ac658db32821e271161b563eac4926285ba6b8f410",
+      "7dee95aa3c462d3eb7ecb61536cb215e471d1fa73d8643a967905946e26c536588c5058abd5a049a22b987db95a7fb420f3bff12359dc53d03d7ce7df714e029"
+    ]
+  }
+}
diff --git a/test/fixtures/ec.js b/test/fixtures/ec.json
similarity index 99%
rename from test/fixtures/ec.js
rename to test/fixtures/ec.json
index b7b973f..f4390ef 100644
--- a/test/fixtures/ec.js
+++ b/test/fixtures/ec.json
@@ -1,4 +1,4 @@
-module.exports = {
+{
   "valid": {
     "ECPointFp": [
       {
diff --git a/test/fixtures/ecdsa.js b/test/fixtures/ecdsa.json
similarity index 99%
rename from test/fixtures/ecdsa.js
rename to test/fixtures/ecdsa.json
index 6936dd1..d8b7f60 100644
--- a/test/fixtures/ecdsa.js
+++ b/test/fixtures/ecdsa.json
@@ -1,4 +1,4 @@
-module.exports = {
+{
   "valid": [
     {
       "D": "0000000000000000000000000000000000000000000000000000000000000001",
diff --git a/test/fixtures/eckey.js b/test/fixtures/eckey.json
similarity index 99%
rename from test/fixtures/eckey.js
rename to test/fixtures/eckey.json
index 1751ae8..11736ec 100644
--- a/test/fixtures/eckey.js
+++ b/test/fixtures/eckey.json
@@ -1,4 +1,4 @@
-module.exports = {
+{
   "valid": [
     {
       "D": "1",
@@ -95,4 +95,4 @@ module.exports = {
       }
     ]
   }
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/ecpubkey.js b/test/fixtures/ecpubkey.json
similarity index 97%
rename from test/fixtures/ecpubkey.js
rename to test/fixtures/ecpubkey.json
index 77b9b42..87b8aa2 100644
--- a/test/fixtures/ecpubkey.js
+++ b/test/fixtures/ecpubkey.json
@@ -1,4 +1,4 @@
-module.exports = {
+{
   "Q": {
     "x": "55066263022277343669578718895168534326250603453777594175500187360389116729240",
     "y": "32670510020758816978083085130507043184471273380659243275938904335757337482424"
@@ -16,4 +16,4 @@ module.exports = {
     "r": "68972263025625296948424563184904289678530916807200550828762374724416876919710",
     "s": "43478152510424186005054433052302509227777805602212468112169549534899266476898"
   }
-}
\ No newline at end of file
+}
diff --git a/test/fixtures/message.js b/test/fixtures/message.js
deleted file mode 100644
index 756dcdd..0000000
--- a/test/fixtures/message.js
+++ /dev/null
@@ -1,19 +0,0 @@
-module.exports = {
-  magicHash: [
-    {
-      network: 'bitcoin',
-      message: '',
-      magicHash: '80e795d4a4caadd7047af389d9f7f220562feb6196032e2131e10563352c4bcc'
-    },
-    {
-      network: 'bitcoin',
-      message: 'Vires is Numeris',
-      magicHash: 'f8a5affbef4a3241b19067aa694562f64f513310817297089a8929a930f4f933'
-    },
-    {
-      network: 'dogecoin',
-      message: 'Vires is Numeris',
-      magicHash: 'c0963d20d0accd0ea0df6c1020bf85a7e629a40e7b5363f2c3e9dcafd5638f12'
-    }
-  ]
-}
diff --git a/test/fixtures/message.json b/test/fixtures/message.json
new file mode 100644
index 0000000..3db64c9
--- /dev/null
+++ b/test/fixtures/message.json
@@ -0,0 +1,19 @@
+{
+  "magicHash": [
+    {
+      "network": "bitcoin",
+      "message": "",
+      "magicHash": "80e795d4a4caadd7047af389d9f7f220562feb6196032e2131e10563352c4bcc"
+    },
+    {
+      "network": "bitcoin",
+      "message": "Vires is Numeris",
+      "magicHash": "f8a5affbef4a3241b19067aa694562f64f513310817297089a8929a930f4f933"
+    },
+    {
+      "network": "dogecoin",
+      "message": "Vires is Numeris",
+      "magicHash": "c0963d20d0accd0ea0df6c1020bf85a7e629a40e7b5363f2c3e9dcafd5638f12"
+    }
+  ]
+}
diff --git a/test/fixtures/script.js b/test/fixtures/script.js
deleted file mode 100644
index 8fb5d21..0000000
--- a/test/fixtures/script.js
+++ /dev/null
@@ -1,54 +0,0 @@
-module.exports = {
-  valid: [
-    {
-      description: 'P2SH ScriptPubKey',
-      hex: 'a914e8c300c87986efa84c37c0519929019ef86eb5b487',
-      type: 'scripthash',
-      hash: '0ba47b56a573bab4b430ad6ed3ec79270e04b066',
-      scriptPubKey: true
-    },
-    {
-      description: 'PubKeyHash ScriptPubKey',
-      hex: '76a9145a3acbc7bbcc97c5ff16f5909c9d7d3fadb293a888ac',
-      type: 'pubkeyhash',
-      hash: 'a5313f33d5c7b81674b35f7f3febc3522ef234db',
-      scriptPubKey: true
-    },
-    {
-      description: 'pubKeyHash scriptSig',
-      hex: '48304502206becda98cecf7a545d1a640221438ff8912d9b505ede67e0138485111099f696022100ccd616072501310acba10feb97cecc918e21c8e92760cd35144efec7622938f30141040cd2d2ce17a1e9b2b3b2cb294d40eecf305a25b7e7bfdafae6bb2639f4ee399b3637706c3d377ec4ab781355add443ae864b134c5e523001c442186ea60f0eb8',
-      type: 'pubkeyhash',
-      hash: 'b9bac2a5c5c29bb27c382d41fa3d179c646c78fd',
-      scriptPubKey: false
-    },
-    {
-      description: 'Valid multisig script',
-      hex: '5121032487c2a32f7c8d57d2a93906a6457afd00697925b0e6e145d89af6d3bca330162102308673d16987eaa010e540901cc6fe3695e758c19f46ce604e174dac315e685a52ae',
-      type: 'multisig',
-      hash: 'f1c98f0b74ecabcf78ae20dfa224bb6666051fbe',
-      scriptPubKey: true
-    },
-    {
-      description: 'OP_RETURN script',
-      hex:'6a2606deadbeef03f895a2ad89fb6d696497af486cb7c644a27aa568c7a18dd06113401115185474',
-      type: 'nulldata',
-      hash: 'ec88f016655477663455fe6a8e83508c348ea145',
-      scriptPubKey: true
-    },
-    {
-      description: 'Non standard script',
-      hex: 'aa206fe28c0ab6f1b372c1a6a246ae63f74f931e8365e15a089c68d619000000000087',
-      type: 'nonstandard',
-      hash: '3823382e70d1930989813d3459988e0d7c2861d8',
-      scriptPubKey: true
-    },
-    {
-      description: 'Invalid multisig script',
-      asm: '0 0 0 OP_CHECKmulTISIG',
-      hex: '000000ae',
-      type: 'nonstandard',
-      hash: '62ede8963f9387544935f168745262f703dab1fb',
-      scriptPubKey: true
-    }
-  ]
-}
diff --git a/test/fixtures/script.json b/test/fixtures/script.json
new file mode 100644
index 0000000..17d2f64
--- /dev/null
+++ b/test/fixtures/script.json
@@ -0,0 +1,54 @@
+{
+  "valid": [
+    {
+      "description": "P2SH ScriptPubKey",
+      "hex": "a914e8c300c87986efa84c37c0519929019ef86eb5b487",
+      "type": "scripthash",
+      "hash": "0ba47b56a573bab4b430ad6ed3ec79270e04b066",
+      "scriptPubKey": true
+    },
+    {
+      "description": "PubKeyHash ScriptPubKey",
+      "hex": "76a9145a3acbc7bbcc97c5ff16f5909c9d7d3fadb293a888ac",
+      "type": "pubkeyhash",
+      "hash": "a5313f33d5c7b81674b35f7f3febc3522ef234db",
+      "scriptPubKey": true
+    },
+    {
+      "description": "pubKeyHash scriptSig",
+      "hex": "48304502206becda98cecf7a545d1a640221438ff8912d9b505ede67e0138485111099f696022100ccd616072501310acba10feb97cecc918e21c8e92760cd35144efec7622938f30141040cd2d2ce17a1e9b2b3b2cb294d40eecf305a25b7e7bfdafae6bb2639f4ee399b3637706c3d377ec4ab781355add443ae864b134c5e523001c442186ea60f0eb8",
+      "type": "pubkeyhash",
+      "hash": "b9bac2a5c5c29bb27c382d41fa3d179c646c78fd",
+      "scriptPubKey": false
+    },
+    {
+      "description": "Valid multisig script",
+      "hex": "5121032487c2a32f7c8d57d2a93906a6457afd00697925b0e6e145d89af6d3bca330162102308673d16987eaa010e540901cc6fe3695e758c19f46ce604e174dac315e685a52ae",
+      "type": "multisig",
+      "hash": "f1c98f0b74ecabcf78ae20dfa224bb6666051fbe",
+      "scriptPubKey": true
+    },
+    {
+      "description": "OP_RETURN script",
+      "hex":"6a2606deadbeef03f895a2ad89fb6d696497af486cb7c644a27aa568c7a18dd06113401115185474",
+      "type": "nulldata",
+      "hash": "ec88f016655477663455fe6a8e83508c348ea145",
+      "scriptPubKey": true
+    },
+    {
+      "description": "Non standard script",
+      "hex": "aa206fe28c0ab6f1b372c1a6a246ae63f74f931e8365e15a089c68d619000000000087",
+      "type": "nonstandard",
+      "hash": "3823382e70d1930989813d3459988e0d7c2861d8",
+      "scriptPubKey": true
+    },
+    {
+      "description": "Invalid multisig script",
+      "asm": "0 0 0 OP_CHECKmulTISIG",
+      "hex": "000000ae",
+      "type": "nonstandard",
+      "hash": "62ede8963f9387544935f168745262f703dab1fb",
+      "scriptPubKey": true
+    }
+  ]
+}
diff --git a/test/fixtures/syncscript.js b/test/fixtures/syncscript.js
index 02c1f6f..8e4f24e 100644
--- a/test/fixtures/syncscript.js
+++ b/test/fixtures/syncscript.js
@@ -55,7 +55,7 @@ request('https://raw.githubusercontent.com/bitcoin/bitcoin/master/src/test/data/
     ]
   }, null, '  ')
 
-  fs.writeFileSync('./test/fixtures/base58.js', 'module.exports = ' + fixture)
+  fs.writeFileSync('./test/fixtures/base58.json', fixture)
 })
 
 request('https://raw.githubusercontent.com/bitcoin/bitcoin/master/src/test/data/base58_keys_valid.json', function (error, response, body) {
@@ -115,6 +115,6 @@ request('https://raw.githubusercontent.com/bitcoin/bitcoin/master/src/test/data/
     invalid2: invalid2
   }, null, '  ')
 
-  fs.writeFileSync('./test/fixtures/base58check.js', 'module.exports = ' + fixture)
+  fs.writeFileSync('./test/fixtures/base58check.json', fixture)
 })
 })
diff --git a/test/message.js b/test/message.js
index 7f31545..f819b8f 100644
--- a/test/message.js
+++ b/test/message.js
@@ -5,7 +5,7 @@ var BigInteger = require('bigi')
 var ECKey = require('../src/eckey')
 var Message = require('../src/message')
 
-var fixtures = require('./fixtures/message')
+var fixtures = require('./fixtures/message.json')
 
 describe('Message', function() {
   var message
diff --git a/test/script.js b/test/script.js
index 595a130..9c18e4b 100644
--- a/test/script.js
+++ b/test/script.js
@@ -6,7 +6,7 @@ var Address = require('../src/address')
 var ECPubKey = require('../src/ecpubkey')
 var Script = require('../src/script')
 
-var fixtures = require('./fixtures/script')
+var fixtures = require('./fixtures/script.json')
 
 function b2h(b) { return new Buffer(b).toString('hex') }
 function h2b(h) { return new Buffer(h, 'hex') }