diff --git a/lib/unit.js b/lib/unit.js
index f2ca33cc5..c1abffe19 100644
--- a/lib/unit.js
+++ b/lib/unit.js
@@ -41,10 +41,10 @@ function Unit(amount, code) {
 };
 
 var UNITS = {
-  "BTC"      : [1e8, 8],
-  "mBTC"     : [1e5, 5],
-  "bits"     : [1e2, 2],
-  "satoshis" : [1, 0]
+  'BTC'      : [1e8, 8],
+  'mBTC'     : [1e5, 5],
+  'bits'     : [1e2, 2],
+  'satoshis' : [1, 0]
 };
 
 Object.keys(UNITS).forEach(function(key) {
diff --git a/test/unit.js b/test/unit.js
index d9f1ecddb..d6f3092fe 100644
--- a/test/unit.js
+++ b/test/unit.js
@@ -81,7 +81,7 @@ describe('Unit', function() {
   });
 
   it('should expose shorthand conversion methods', function() {
-    var unit = new Unit(1.3, "BTC");
+    var unit = new Unit(1.3, 'BTC');
     unit.toBTC().should.equal(unit.BTC);
     unit.toMilis().should.equal(unit.mBTC);
     unit.toBits().should.equal(unit.bits);
@@ -89,7 +89,7 @@ describe('Unit', function() {
   });
 
   it('should expose a general conversion method', function() {
-    var unit = new Unit(1.3, "BTC");
+    var unit = new Unit(1.3, 'BTC');
     unit.to(Unit.BTC).should.equal(unit.BTC);
     unit.to(Unit.mBTC).should.equal(unit.mBTC);
     unit.to(Unit.bits).should.equal(unit.bits);
@@ -97,13 +97,13 @@ describe('Unit', function() {
   });
 
   it('should have a toString method', function() {
-    var unit = new Unit(1.3, "BTC");
+    var unit = new Unit(1.3, 'BTC');
     should.exist(unit.toString);
     unit.toString().should.be.a('string');
   });
 
   it('should have an inspect method', function() {
-    var unit = new Unit(1.3, "BTC");
+    var unit = new Unit(1.3, 'BTC');
     should.exist(unit.inspect);
     unit.inspect().should.be.a('string');
   });