diff --git a/lib/usb_connection.js b/lib/usb_connection.js
index 6b0806a5..16458b50 100644
--- a/lib/usb_connection.js
+++ b/lib/usb_connection.js
@@ -119,39 +119,58 @@ USB.Connection.prototype.open = function() {
       return reject(e, self);
     }
     // Set interface settings
-    self.intf.setAltSetting(2, function(error) {
-      if (error) {
-        return reject(error, self);
-      }
-      self.epIn = self.intf.endpoints[0];
-      self.epOut = self.intf.endpoints[1];
-      if (!self.epIn || !self.epOut) {
-        return reject(new Error('Device endpoints were not able to be loaded'), self);
-      }
-
-      // Map desciptions
-      self.device.getStringDescriptor(self.device.deviceDescriptor.iSerialNumber, function(error, data) {
-        if (error) {
-          return reject(error, self);
+    return self.setAltSetting()
+      .then(() => {
+        self.epIn = self.intf.endpoints[0];
+        self.epOut = self.intf.endpoints[1];
+        if (!self.epIn || !self.epOut) {
+          return reject(new Error('Device endpoints were not able to be loaded'), self);
         }
 
-        self.serialNumber = data;
-        // Register this connection with daemon (keeps track of active remote processes)
-        Daemon.register(self);
+        // Map desciptions
+        self.device.getStringDescriptor(self.device.deviceDescriptor.iSerialNumber, function(error, data) {
+          if (error) {
+            return reject(error, self);
+          }
 
-        // If the USB Pipe isn't enabled on the other end (ie it is booting)
-        self.epIn.on('error', function(err) {
-          // Close the device resources
-          self._close();
-          // Catch the error and return if we haven't already
-          return reject(err);
+          self.serialNumber = data;
+          // Register this connection with daemon (keeps track of active remote processes)
+          Daemon.register(self);
+
+          // If the USB Pipe isn't enabled on the other end (ie it is booting)
+          self.epIn.on('error', function(err) {
+            // Close the device resources
+            self._close();
+            // Catch the error and return if we haven't already
+            return reject(err);
+          });
+
+          // Start receiving messages
+          self._receiveMessages();
+          // If all is well, resolve the promise with the valid connection
+          return resolve(self);
         });
+      })
+      .catch(reject);
+  });
+};
 
-        // Start receiving messages
-        self._receiveMessages();
-        // If all is well, resolve the promise with the valid connection
-        return resolve(self);
-      });
+USB.Connection.prototype.setAltSetting = function() {
+  return new Promise((resolve, reject) => {
+    // Set interface settings
+    this.intf.setAltSetting(0, (error) => {
+      if (error) {
+        return reject(error, this);
+      } else {
+        // Set interface settings
+        this.intf.setAltSetting(2, (error) => {
+          if (error) {
+            return reject(error, this);
+          } else {
+            return resolve();
+          }
+        });
+      }
     });
   });
 };
diff --git a/test/unit/usb_connection.js b/test/unit/usb_connection.js
index 9422bf4e..eb4aa608 100644
--- a/test/unit/usb_connection.js
+++ b/test/unit/usb_connection.js
@@ -92,6 +92,101 @@ exports['USB.Connection.prototype._write'] = {
   },
 };
 
+exports['USB.Connection.prototype.open'] = {
+  setUp: function(done) {
+    var self = this;
+    this.sandbox = sinon.sandbox.create();
+    this.err = this.sandbox.stub(logs, 'err');
+    this.processExit = this.sandbox.stub(process, 'exit');
+    this.usbConnection = new USB.Connection({});
+    this.usbConnection.epOut = new Emitter();
+    this.usbConnection.epOut.transfer = this.sandbox.spy();
+    this.usbConnection.epIn = new Emitter();
+    this.usbConnection.epIn.startPoll = this.sandbox.spy();
+    this.closeFunc = this.sandbox.spy(this.usbConnection, '_close');
+    this.fakeInterface = {
+      claim: function() {},
+      setAltSetting: function(arg1, cb) {
+        cb();
+      },
+      endpoints: [self.usbConnection.epIn, self.usbConnection.epOut],
+    };
+    this.sandbox.stub(this.usbConnection, 'device', {
+      open: function() {},
+      interface: function() {
+        return self.fakeInterface;
+      },
+      getStringDescriptor: function(arg1, cb) {
+        cb();
+      },
+      deviceDescriptor: {
+        iSerialNumber: 'blah',
+      }
+    });
+    this.openDevice = this.sandbox.spy(this.usbConnection.device, 'open');
+    this.interface = this.sandbox.spy(this.usbConnection.device, 'interface');
+    this.claim = this.sandbox.spy(this.fakeInterface, 'claim');
+    this.setAltSetting = this.sandbox.spy(this.fakeInterface, 'setAltSetting');
+    this.getStringDescriptor = this.sandbox.spy(this.usbConnection.device, 'getStringDescriptor');
+    this.daemonRegister = this.sandbox.spy(Daemon, 'register');
+    done();
+  },
+
+  tearDown: function(done) {
+    this.sandbox.restore();
+    done();
+  },
+
+  standardOpen: function(test) {
+    test.expect(11);
+
+    this.usbConnection.open()
+      .then(() => {
+        test.ok(this.openDevice.calledOnce);
+        test.ok(this.interface.calledOnce);
+        test.ok(this.interface.alwaysCalledWith(0));
+        test.ok(this.claim.calledOnce);
+        test.ok(this.setAltSetting.calledTwice);
+        test.equal(this.setAltSetting.firstCall.args[0], 0);
+        test.equal(this.setAltSetting.secondCall.args[0], 2);
+        test.ok(this.getStringDescriptor.calledOnce);
+        test.ok(this.daemonRegister.calledOnce);
+        test.equal(this.closeFunc.called, false);
+        test.ok(this.usbConnection.epIn.startPoll.calledOnce);
+        test.done();
+      })
+      .catch(function() {
+        // It should not error
+        test.fail();
+      });
+  },
+
+  setAltSettingFails: function(test) {
+    test.expect(9);
+
+    this.connectionAltSetting = this.sandbox.stub(this.usbConnection, 'setAltSetting').returns(Promise.reject('bad usb things'));
+
+    this.usbConnection.open()
+      .then(() => {
+        // It should not succeed
+        test.fail();
+      })
+      .catch((err) => {
+        test.ok(err);
+        test.ok(this.openDevice.calledOnce);
+        test.equal(this.interface.called, true);
+        test.equal(this.claim.called, true);
+        test.equal(this.setAltSetting.called, false);
+        test.equal(this.getStringDescriptor.called, false);
+        test.equal(this.daemonRegister.called, false);
+        test.equal(this.closeFunc.called, false);
+        test.equal(this.usbConnection.epIn.startPoll.called, false);
+        test.done();
+      });
+  },
+
+};
+
 exports['USB.Connection.prototype._receiveMessages'] = {
   setUp: function(done) {
     this.sandbox = sinon.sandbox.create();