diff --git a/bitcore.js b/bitcore.js
index 4a6af68..1ab83ef 100644
--- a/bitcore.js
+++ b/bitcore.js
@@ -62,8 +62,3 @@ requireWhenAccessed('Message', './lib/Message');
 requireWhenAccessed('Electrum', './lib/Electrum');
 module.exports.Buffer = Buffer;
 
-if (typeof process.versions === 'undefined') {
-  // Browser specific
-  module.exports.Bignum.config({EXPONENTIAL_AT: 9999999, DECIMAL_PLACES: 0, ROUNDING_MODE: 1});
-}
-
diff --git a/lib/browser/Bignum.js b/lib/browser/Bignum.js
index 9a947d9..b017dca 100644
--- a/lib/browser/Bignum.js
+++ b/lib/browser/Bignum.js
@@ -2118,4 +2118,6 @@ P['valueOf'] = function () {
 
 
 // EXPORT
+BigNumber.config({EXPONENTIAL_AT: 9999999, DECIMAL_PLACES: 0, ROUNDING_MODE: 1});
 module.exports = BigNumber;
+
diff --git a/test/index.html b/test/index.html
index 5f88d54..79a80fa 100644
--- a/test/index.html
+++ b/test/index.html
@@ -16,7 +16,9 @@
     <script src="adapter.js"></script>
 
     <script src="test.Address.js"></script>
+    <script src="test.Base58.js"></script>
     <script src="test.basic.js"></script>
+    <script src="test.Bignum.browser.js"></script>
     <script src="test.BIP32.js"></script>
     <script src="test.Block.js"></script>
     <script src="test.Bloom.js"></script>
diff --git a/test/test.Base58.js b/test/test.Base58.js
index edc9227..0d2d6c6 100644
--- a/test/test.Base58.js
+++ b/test/test.Base58.js
@@ -1,6 +1,8 @@
-var assert = require('assert');
-var base58 = require('../lib/Base58').base58;
-var base58Check = require('../lib/Base58').base58Check;
+var chai = chai || require('chai');
+var assert = chai.assert;
+var bitcore = bitcore || require('../bitcore');
+var base58 = bitcore.Base58.base58;
+var base58Check = bitcore.Base58.base58Check;
 
 var testData = [
   ["61", "2g", "C2dGTwc"],
@@ -19,31 +21,33 @@ var testData = [
 
 //suite('basic');
 
-test('allData', function() {
-  base58.encodeTest = function(raw, b58str) {
-    assert.equal(base58.encode(raw), b58str);
-  };
+describe('Base58', function() {
+  it('should pass these tests', function() {
+    base58.encodeTest = function(raw, b58str) {
+      assert.equal(base58.encode(raw), b58str);
+    };
 
-  base58.decodeTest = function(raw, b58str) {
-    assert.equal(raw.toString('hex'), base58.decode(b58str).toString('hex'));
-  };
+    base58.decodeTest = function(raw, b58str) {
+      assert.equal(raw.toString('hex'), base58.decode(b58str).toString('hex'));
+    };
 
-  base58Check.encodeTest = function(raw, b58str) {
-    assert.equal(base58Check.encode(raw), b58str);
-  };
+    base58Check.encodeTest = function(raw, b58str) {
+      assert.equal(base58Check.encode(raw), b58str);
+    };
 
-  base58Check.decodeTest = function(raw, b58str) {
-    assert.equal(raw.toString('hex'), base58Check.decode(b58str).toString('hex'));
-  };
+    base58Check.decodeTest = function(raw, b58str) {
+      assert.equal(raw.toString('hex'), base58Check.decode(b58str).toString('hex'));
+    };
 
-  testData.forEach(function(datum) {
-    var raw = new Buffer(datum[0], 'hex');
-    var b58 = datum[1];
-    var b58Check = datum[2];
+    testData.forEach(function(datum) {
+      var raw = new Buffer(datum[0], 'hex');
+      var b58 = datum[1];
+      var b58Check = datum[2];
 
-    base58.encodeTest(raw, b58);
-    base58.decodeTest(raw, b58);
-    base58Check.encodeTest(raw, b58Check);
-    base58Check.decodeTest(raw, b58Check);
+      base58.encodeTest(raw, b58);
+      base58.decodeTest(raw, b58);
+      base58Check.encodeTest(raw, b58Check);
+      base58Check.decodeTest(raw, b58Check);
+    });
   });
 });
diff --git a/test/test.Bignum.browser.js b/test/test.Bignum.browser.js
new file mode 100644
index 0000000..172d410
--- /dev/null
+++ b/test/test.Bignum.browser.js
@@ -0,0 +1,18 @@
+var chai = chai || require('chai');
+var bitcore = bitcore || require('../bitcore');
+var coinUtil = coinUtil || bitcore.util;
+var should = chai.should();
+var assert = chai.assert;
+
+var Bignum = bitcore.Bignum;
+
+if (typeof process == 'undefined' || typeof process.versions == 'undefined') {
+  describe('#Bignum.browser', function() {
+    it('should have proper config settings', function() {
+      bitcore.Bignum.config().EXPONENTIAL_AT[0].should.equal(-9999999);
+      bitcore.Bignum.config().EXPONENTIAL_AT[1].should.equal(9999999);
+      bitcore.Bignum.config().DECIMAL_PLACES.should.equal(0);
+      bitcore.Bignum.config().ROUNDING_MODE.should.equal(1);
+    });
+  });
+}