diff --git a/test/smtpAppender-test.js b/test/smtpAppender-test.js
index d8ebd87..1fd5bb9 100644
--- a/test/smtpAppender-test.js
+++ b/test/smtpAppender-test.js
@@ -1,169 +1,169 @@
-var vows = require('vows'),
-    assert = require('assert'),
-    log4js = require('../lib/log4js'),
-    sandbox = require('sandboxed-module');
+"use strict";
+var vows = require('vows')
+, assert = require('assert')
+, log4js = require('../lib/log4js')
+, sandbox = require('sandboxed-module')
+;
 
 function setupLogging(category, options) {
-    var msgs = [];
-
-    var fakeMailer = {
+  var msgs = [];
+  
+  var fakeMailer = {
 		createTransport: function (name, options) {
 			return {
 				config: options,
 				sendMail: function (msg, callback) {
-				    msgs.push(msg);
-				    callback(null, true);
-				},
+          msgs.push(msg);
+          callback(null, true);
+        },
         close: function() {}
 			};
 		}
-    };
+  };
 
-    var smtpModule = sandbox.require('../lib/appenders/smtp', {
+  var smtpModule = sandbox.require('../lib/appenders/smtp', {
 		requires: {
-		    'nodemailer': fakeMailer
+      'nodemailer': fakeMailer
 		}
-    });
+  });
 
-    log4js.addAppender(smtpModule.configure(options), category);
-
-    return {
+  log4js.addAppender(smtpModule.configure(options), category);
+  
+  return {
 		logger: log4js.getLogger(category),
 		mailer: fakeMailer,
 		results: msgs
-    };
+  };
 }
 
 function checkMessages (result, sender, subject) {
-    for (var i = 0; i < result.results.length; ++i) {
+  for (var i = 0; i < result.results.length; ++i) {
 		assert.equal(result.results[i].from, sender);
 		assert.equal(result.results[i].to, 'recipient@domain.com');
 		assert.equal(result.results[i].subject, subject ? subject : 'Log event #' + (i+1));
 		assert.ok(new RegExp('.+Log event #' + (i+1) + '\n$').test(result.results[i].text));
-    }
+  }
 }
 
 log4js.clearAppenders();
 vows.describe('log4js smtpAppender').addBatch({
-    'minimal config': {
+  'minimal config': {
 		topic: function() {
-		    var setup = setupLogging('minimal config', {
-			recipients: 'recipient@domain.com',
-			transport: "SMTP",
-			SMTP: {
-			    port: 25,
-			    auth: {
-				    user: 'user@domain.com'
-			    }
-			}
-		    });
-		    setup.logger.info('Log event #1');
-		    return setup;
+      var setup = setupLogging('minimal config', {
+        recipients: 'recipient@domain.com',
+        transport: "SMTP",
+        SMTP: {
+          port: 25,
+          auth: {
+            user: 'user@domain.com'
+          }
+        }
+      });
+      setup.logger.info('Log event #1');
+      return setup;
 		},
 		'there should be one message only': function (result) {
-		    assert.equal(result.results.length, 1);
+      assert.equal(result.results.length, 1);
 		},
 		'message should contain proper data': function (result) {
-		    checkMessages(result);
+      checkMessages(result);
 		}
+  },
+  'fancy config': {
+    topic: function() {
+      var setup = setupLogging('fancy config', {
+        recipients: 'recipient@domain.com',
+        sender: 'sender@domain.com',
+        subject: 'This is subject',
+        transport: "SMTP",
+        SMTP: {
+          port: 25,
+          auth: {
+            user: 'user@domain.com'
+          }
+        }
+      });
+      setup.logger.info('Log event #1');
+      return setup;
     },
-    'fancy config': {
-		topic: function() {
-		    var setup = setupLogging('fancy config', {
-			recipients: 'recipient@domain.com',
-			sender: 'sender@domain.com',
-			subject: 'This is subject',
-			transport: "SMTP",
-			SMTP: {
-			    port: 25,
-			    auth: {
-				    user: 'user@domain.com'
-			    }
-			}
-		    });
-		    setup.logger.info('Log event #1');
-		    return setup;
-		},
-		'there should be one message only': function (result) {
-		    assert.equal(result.results.length, 1);
-		},
-		'message should contain proper data': function (result) {
-		    checkMessages(result, 'sender@domain.com', 'This is subject');
-		}
+    'there should be one message only': function (result) {
+      assert.equal(result.results.length, 1);
     },
-    'separate email for each event': {
-		topic: function() {
-		    var self = this;
-		    var setup = setupLogging('separate email for each event', {
-				recipients: 'recipient@domain.com',
-				transport: "SMTP",
-				SMTP: {
-				    port: 25,
-				    auth: {
-					    user: 'user@domain.com'
-				    }
-				}
-		    });
-		    setTimeout(function () {
-		    	setup.logger.info('Log event #1');
-		    }, 0);
-		    setTimeout(function () {
-		    	setup.logger.info('Log event #2');
-		    }, 500);
-		    setTimeout(function () {
-		    	setup.logger.info('Log event #3');
-		    }, 1050);
-		    setTimeout(function () {
-		    	self.callback(null, setup);
-		    }, 2100);
-		},
-		'there should be three messages': function (result) {
-		    assert.equal(result.results.length, 3);
-		},
-		'messages should contain proper data': function (result) {
-		    checkMessages(result);
-		}
-    },
-    'multiple events in one email': {
-		topic: function() {
-		    var self = this;
-		    var setup = setupLogging('multiple events in one email', {
-				recipients: 'recipient@domain.com',
-				sendInterval: 1,
-				transport: "SMTP",
-				SMTP: {
-				    port: 25,
-				    auth: {
-					    user: 'user@domain.com'
-				    }
-				}
-		    });
-		    setTimeout(function () {
-		    	setup.logger.info('Log event #1');
-		    }, 0);
-		    setTimeout(function () {
-		    	setup.logger.info('Log event #2');
-		    }, 500);
-		    setTimeout(function () {
-		    	setup.logger.info('Log event #3');
-		    }, 1050);
-		    setTimeout(function () {
-		    	self.callback(null, setup);
-		    }, 2100);
-		},
-		'there should be two messages': function (result) {
-		    assert.equal(result.results.length, 2);
-		},
-		'messages should contain proper data': function (result) {
-		    assert.equal(result.results[0].to, 'recipient@domain.com');
-		    assert.equal(result.results[0].subject, 'Log event #1');
-		    assert.equal(result.results[0].text.match(new RegExp('.+Log event #[1-2]$', 'gm')).length, 2);
-	
-		    assert.equal(result.results[1].to, 'recipient@domain.com');
-		    assert.equal(result.results[1].subject, 'Log event #3');
-		    assert.ok(new RegExp('.+Log event #3\n$').test(result.results[1].text));
-		}
+    'message should contain proper data': function (result) {
+      checkMessages(result, 'sender@domain.com', 'This is subject');
     }
-
+  },
+  'separate email for each event': {
+    topic: function() {
+      var self = this;
+      var setup = setupLogging('separate email for each event', {
+        recipients: 'recipient@domain.com',
+        transport: "SMTP",
+        SMTP: {
+          port: 25,
+          auth: {
+            user: 'user@domain.com'
+          }
+        }
+      });
+      setTimeout(function () {
+        setup.logger.info('Log event #1');
+      }, 0);
+      setTimeout(function () {
+        setup.logger.info('Log event #2');
+      }, 500);
+      setTimeout(function () {
+        setup.logger.info('Log event #3');
+      }, 1050);
+      setTimeout(function () {
+        self.callback(null, setup);
+      }, 2100);
+    },
+    'there should be three messages': function (result) {
+      assert.equal(result.results.length, 3);
+    },
+    'messages should contain proper data': function (result) {
+      checkMessages(result);
+    }
+  },
+  'multiple events in one email': {
+    topic: function() {
+      var self = this;
+      var setup = setupLogging('multiple events in one email', {
+        recipients: 'recipient@domain.com',
+        sendInterval: 1,
+        transport: "SMTP",
+        SMTP: {
+          port: 25,
+          auth: {
+            user: 'user@domain.com'
+          }
+        }
+      });
+      setTimeout(function () {
+        setup.logger.info('Log event #1');
+      }, 0);
+      setTimeout(function () {
+        setup.logger.info('Log event #2');
+      }, 500);
+      setTimeout(function () {
+        setup.logger.info('Log event #3');
+      }, 1050);
+      setTimeout(function () {
+        self.callback(null, setup);
+      }, 2100);
+    },
+    'there should be two messages': function (result) {
+      assert.equal(result.results.length, 2);
+    },
+    'messages should contain proper data': function (result) {
+      assert.equal(result.results[0].to, 'recipient@domain.com');
+      assert.equal(result.results[0].subject, 'Log event #1');
+      assert.equal(result.results[0].text.match(new RegExp('.+Log event #[1-2]$', 'gm')).length, 2);
+      assert.equal(result.results[1].to, 'recipient@domain.com');
+      assert.equal(result.results[1].subject, 'Log event #3');
+      assert.ok(new RegExp('.+Log event #3\n$').test(result.results[1].text));
+    }
+  }
 }).export(module);