diff --git a/test/tap/fileAppender-test.js b/test/tap/fileAppender-test.js
new file mode 100644
index 0000000..91d726e
--- /dev/null
+++ b/test/tap/fileAppender-test.js
@@ -0,0 +1,371 @@
+'use strict';
+
+const test = require('tap').test;
+const fs = require('fs');
+const path = require('path');
+const sandbox = require('sandboxed-module');
+const log4js = require('../../lib/log4js');
+const zlib = require('zlib');
+const EOL = require('os').EOL || '\n';
+
+log4js.clearAppenders();
+
+function remove(filename) {
+  try {
+    fs.unlinkSync(filename);
+  } catch (e) {
+    // doesn't really matter if it failed
+  }
+}
+
+test('log4js fileAppender', (batch) => {
+  batch.test('adding multiple fileAppenders', (t) => {
+    const initialCount = process.listeners('exit').length;
+    let count = 5;
+    let logfile;
+
+    while (count--) {
+      logfile = path.join(__dirname, `fa-default-test${count}.log`);
+      log4js.addAppender(
+        require('../../lib/appenders/file').appender(logfile),
+        'default-settings'
+      );
+    }
+
+    t.equal(initialCount + 1, process.listeners('exit').length, 'should not add more than one exit listener');
+    t.end();
+  });
+
+  batch.test('exit listener', (t) => {
+    let exitListener;
+    const openedFiles = [];
+
+    const fileAppender = sandbox.require(
+      '../../lib/appenders/file',
+      {
+        globals: {
+          process: {
+            on: function (evt, listener) {
+              if (evt === 'exit') {
+                exitListener = listener;
+              }
+            }
+          }
+        },
+        singleOnly: true,
+        requires: {
+          streamroller: {
+            RollingFileStream: function (filename) {
+              openedFiles.push(filename);
+
+              this.end = function () {
+                openedFiles.shift();
+              };
+
+              this.on = function () {
+              };
+            }
+          }
+        }
+      }
+    );
+
+    for (let i = 0; i < 5; i += 1) {
+      fileAppender.appender(`test${i}`, null, 100);
+    }
+    t.ok(openedFiles);
+    exitListener();
+    t.equal(openedFiles.length, 0, 'should close all open files');
+    t.end();
+  });
+
+  batch.test('with default fileAppender settings', (t) => {
+    const testFile = path.join(__dirname, 'fa-default-test.log');
+    const logger = log4js.getLogger('default-settings');
+    remove(testFile);
+
+    log4js.clearAppenders();
+    log4js.addAppender(
+      require('../../lib/appenders/file').appender(testFile),
+      'default-settings'
+    );
+
+    logger.info('This should be in the file.');
+
+    setTimeout(() => {
+      fs.readFile(testFile, 'utf8', (err, fileContents) => {
+        t.include(fileContents, `This should be in the file.${EOL}`);
+        t.match(
+          fileContents,
+          /\[\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}\.\d{3}] \[INFO] default-settings - /
+        );
+        t.end();
+      });
+    }, 100);
+  });
+
+  batch.test('fileAppender subcategories', (t) => {
+    log4js.clearAppenders();
+
+    function addAppender(cat) {
+      const testFile = path.join(
+        __dirname,
+        `fa-subcategories-test-${cat.join('-').replace(/\./g, '_')}.log`
+      );
+      remove(testFile);
+      log4js.addAppender(require('../../lib/appenders/file').appender(testFile), cat);
+      return testFile;
+    }
+
+    /* eslint-disable camelcase */
+    const file_sub1 = addAppender(['sub1']);
+    const file_sub1_sub12$sub1_sub13 = addAppender(['sub1.sub12', 'sub1.sub13']);
+    const file_sub1_sub12 = addAppender(['sub1.sub12']);
+    const logger_sub1_sub12_sub123 = log4js.getLogger('sub1.sub12.sub123');
+    const logger_sub1_sub13_sub133 = log4js.getLogger('sub1.sub13.sub133');
+    const logger_sub1_sub14 = log4js.getLogger('sub1.sub14');
+    const logger_sub2 = log4js.getLogger('sub2');
+
+    logger_sub1_sub12_sub123.info('sub1_sub12_sub123');
+    logger_sub1_sub13_sub133.info('sub1_sub13_sub133');
+    logger_sub1_sub14.info('sub1_sub14');
+    logger_sub2.info('sub2');
+
+    setTimeout(() => {
+      t.test('file contents', (assert) => {
+        const fileContents = {
+          file_sub1: fs.readFileSync(file_sub1).toString(),
+          file_sub1_sub12$sub1_sub13: fs.readFileSync(file_sub1_sub12$sub1_sub13).toString(),
+          file_sub1_sub12: fs.readFileSync(file_sub1_sub12).toString()
+        };
+        // everything but category 'sub2'
+        assert.match(
+          fileContents.file_sub1,
+          /^(\[\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}\.\d{3}] \[INFO] (sub1.sub12.sub123 - sub1_sub12_sub123|sub1.sub13.sub133 - sub1_sub13_sub133|sub1.sub14 - sub1_sub14)[\s\S]){3}$/ // eslint-disable-line
+        );
+        assert.ok(
+          fileContents.file_sub1.match(/sub123/) &&
+          fileContents.file_sub1.match(/sub133/) &&
+          fileContents.file_sub1.match(/sub14/)
+        );
+        assert.ok(!fileContents.file_sub1.match(/sub2/));
+
+        // only catgories starting with 'sub1.sub12' and 'sub1.sub13'
+        assert.match(
+          fileContents.file_sub1_sub12$sub1_sub13,
+          /^(\[\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}\.\d{3}] \[INFO] (sub1.sub12.sub123 - sub1_sub12_sub123|sub1.sub13.sub133 - sub1_sub13_sub133)[\s\S]){2}$/ // eslint-disable-line
+        );
+        assert.ok(
+          fileContents.file_sub1_sub12$sub1_sub13.match(/sub123/) &&
+          fileContents.file_sub1_sub12$sub1_sub13.match(/sub133/)
+        );
+        assert.ok(!fileContents.file_sub1_sub12$sub1_sub13.match(/sub14|sub2/));
+
+        // only catgories starting with 'sub1.sub12'
+        assert.match(
+          fileContents.file_sub1_sub12,
+          /^(\[\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}\.\d{3}] \[INFO] (sub1.sub12.sub123 - sub1_sub12_sub123)[\s\S]){1}$/ // eslint-disable-line
+        );
+        assert.ok(!fileContents.file_sub1_sub12.match(/sub14|sub2|sub13/));
+        assert.end();
+      });
+      t.end();
+    }, 3000);
+  });
+
+  batch.test('with a max file size and no backups', (t) => {
+    const testFile = path.join(__dirname, 'fa-maxFileSize-test.log');
+    const logger = log4js.getLogger('max-file-size');
+    remove(testFile);
+    remove(`${testFile}.1`);
+    // log file of 100 bytes maximum, no backups
+    log4js.clearAppenders();
+    log4js.addAppender(
+      require('../../lib/appenders/file').appender(testFile, log4js.layouts.basicLayout, 100, 0),
+      'max-file-size'
+    );
+    logger.info('This is the first log message.');
+    logger.info('This is an intermediate log message.');
+    logger.info('This is the second log message.');
+    // wait for the file system to catch up
+    setTimeout(() => {
+      fs.readFile(testFile, 'utf8', (err, fileContents) => {
+        t.include(fileContents, 'This is the second log message.');
+        t.equal(fileContents.indexOf('This is the first log message.'), -1);
+        fs.readdir(__dirname, (e, files) => {
+          const logFiles = files.filter(
+            file => file.includes('fa-maxFileSize-test.log')
+          );
+          t.equal(logFiles.length, 2, 'should be 2 files');
+          t.end();
+        });
+      });
+    }, 100);
+  });
+
+  batch.test('with a max file size and 2 backups', (t) => {
+    const testFile = path.join(__dirname, 'fa-maxFileSize-with-backups-test.log');
+    const logger = log4js.getLogger('max-file-size-backups');
+    remove(testFile);
+    remove(`${testFile}.1`);
+    remove(`${testFile}.2`);
+
+    // log file of 50 bytes maximum, 2 backups
+    log4js.clearAppenders();
+    log4js.addAppender(
+      require('../../lib/appenders/file').appender(testFile, log4js.layouts.basicLayout, 50, 2),
+      'max-file-size-backups'
+    );
+    logger.info('This is the first log message.');
+    logger.info('This is the second log message.');
+    logger.info('This is the third log message.');
+    logger.info('This is the fourth log message.');
+    // give the system a chance to open the stream
+    setTimeout(() => {
+      fs.readdir(__dirname, (err, files) => {
+        const logFiles = files.sort().filter(
+          file => file.includes('fa-maxFileSize-with-backups-test.log')
+        );
+        t.equal(logFiles.length, 3);
+        t.same(logFiles, [
+          'fa-maxFileSize-with-backups-test.log',
+          'fa-maxFileSize-with-backups-test.log.1',
+          'fa-maxFileSize-with-backups-test.log.2'
+        ]);
+        t.test('the contents of the first file', (assert) => {
+          fs.readFile(path.join(__dirname, logFiles[0]), 'utf8', (e, contents) => {
+            assert.include(contents, 'This is the fourth log message.');
+            assert.end();
+          });
+        });
+        t.test('the contents of the second file', (assert) => {
+          fs.readFile(path.join(__dirname, logFiles[1]), 'utf8', (e, contents) => {
+            assert.include(contents, 'This is the third log message.');
+            assert.end();
+          });
+        });
+        t.test('the contents of the third file', (assert) => {
+          fs.readFile(path.join(__dirname, logFiles[2]), 'utf8', (e, contents) => {
+            assert.include(contents, 'This is the second log message.');
+            assert.end();
+          });
+        });
+        t.end();
+      });
+    }, 200);
+  });
+
+  batch.test('with a max file size and 2 compressed backups', (t) => {
+    const testFile = path.join(__dirname, 'fa-maxFileSize-with-backups-compressed-test.log');
+    const logger = log4js.getLogger('max-file-size-backups');
+    remove(testFile);
+    remove(`${testFile}.1.gz`);
+    remove(`${testFile}.2.gz`);
+
+    // log file of 50 bytes maximum, 2 backups
+    log4js.clearAppenders();
+    log4js.addAppender(
+      require('../../lib/appenders/file').appender(
+        testFile, log4js.layouts.basicLayout, 50, 2, { compress: true }
+      ),
+      'max-file-size-backups'
+    );
+    logger.info('This is the first log message.');
+    logger.info('This is the second log message.');
+    logger.info('This is the third log message.');
+    logger.info('This is the fourth log message.');
+    // give the system a chance to open the stream
+    setTimeout(() => {
+      fs.readdir(__dirname, (err, files) => {
+        const logFiles = files.sort().filter(
+          file => file.includes('fa-maxFileSize-with-backups-compressed-test.log')
+        );
+        t.equal(logFiles.length, 3, 'should be 3 files');
+        t.same(logFiles, [
+          'fa-maxFileSize-with-backups-compressed-test.log',
+          'fa-maxFileSize-with-backups-compressed-test.log.1.gz',
+          'fa-maxFileSize-with-backups-compressed-test.log.2.gz'
+        ]);
+        t.test('the contents of the first file', (assert) => {
+          fs.readFile(path.join(__dirname, logFiles[0]), 'utf8', (e, contents) => {
+            assert.include(contents, 'This is the fourth log message.');
+            assert.end();
+          });
+        });
+        t.test('the contents of the second file', (assert) => {
+          zlib.gunzip(fs.readFileSync(path.join(__dirname, logFiles[1])), (e, contents) => {
+            assert.include(contents.toString('utf8'), 'This is the third log message.');
+            assert.end();
+          });
+        });
+        t.test('the contents of the third file', (assert) => {
+          zlib.gunzip(fs.readFileSync(path.join(__dirname, logFiles[2])), (e, contents) => {
+            assert.include(contents.toString('utf8'), 'This is the second log message.');
+            assert.end();
+          });
+        });
+        t.end();
+      });
+    }, 1000);
+  });
+
+  batch.test('configure with fileAppender', (t) => {
+    // this config file defines one file appender (to ./tmp-tests.log)
+    // and sets the log level for "tests" to WARN
+    log4js.configure('./test/tap/log4js.json');
+    const logger = log4js.getLogger('tests');
+    logger.info('this should not be written to the file');
+    logger.warn('this should be written to the file');
+
+    fs.readFile('tmp-tests.log', 'utf8', (err, contents) => {
+      t.include(contents, `this should be written to the file${EOL}`);
+      t.equal(contents.indexOf('this should not be written to the file'), -1);
+      t.end();
+    });
+  });
+
+  batch.test('when underlying stream errors', (t) => {
+    let consoleArgs;
+    let errorHandler;
+
+    const fileAppender = sandbox.require(
+      '../../lib/appenders/file',
+      {
+        globals: {
+          console: {
+            error: function () {
+              consoleArgs = Array.prototype.slice.call(arguments);
+            }
+          }
+        },
+        requires: {
+          streamroller: {
+            RollingFileStream: function () {
+              this.end = function () {
+              };
+              this.on = function (evt, cb) {
+                if (evt === 'error') {
+                  errorHandler = cb;
+                }
+              };
+            }
+          }
+        }
+      }
+    );
+
+    fileAppender.appender('test1.log', null, 100);
+    errorHandler({ error: 'aargh' });
+
+    t.test('should log the error to console.error', (assert) => {
+      assert.ok(consoleArgs);
+      assert.equal(consoleArgs[0], 'log4js.fileAppender - Writing to file %s, error happened ');
+      assert.equal(consoleArgs[1], 'test1.log');
+      assert.equal(consoleArgs[2].error, 'aargh');
+      assert.end();
+    });
+    t.end();
+  });
+
+  batch.end();
+});
diff --git a/test/vows/log4js.json b/test/tap/log4js.json
similarity index 100%
rename from test/vows/log4js.json
rename to test/tap/log4js.json
diff --git a/test/vows/fileAppender-test.js b/test/vows/fileAppender-test.js
deleted file mode 100644
index c2c30fb..0000000
--- a/test/vows/fileAppender-test.js
+++ /dev/null
@@ -1,452 +0,0 @@
-'use strict';
-
-const vows = require('vows');
-const fs = require('fs');
-const path = require('path');
-const sandbox = require('sandboxed-module');
-const log4js = require('../../lib/log4js');
-const assert = require('assert');
-const zlib = require('zlib');
-const EOL = require('os').EOL || '\n';
-
-log4js.clearAppenders();
-
-function remove(filename) {
-  try {
-    fs.unlinkSync(filename);
-  } catch (e) {
-    // doesn't really matter if it failed
-  }
-}
-
-vows.describe('log4js fileAppender').addBatch({
-  'adding multiple fileAppenders': {
-    topic: function () {
-      const listenersCount = process.listeners('exit').length;
-      let count = 5;
-      let logfile;
-
-      while (count--) {
-        logfile = path.join(__dirname, `fa-default-test${count}.log`);
-        log4js.addAppender(
-          require('../../lib/appenders/file').appender(logfile),
-          'default-settings'
-        );
-      }
-
-      return listenersCount;
-    },
-
-    'does not add more than one `exit` listener': function (initialCount) {
-      assert.equal(initialCount + 1, process.listeners('exit').length);
-    }
-  },
-
-  'exit listener': {
-    topic: function () {
-      let exitListener;
-      const openedFiles = [];
-
-      const fileAppender = sandbox.require(
-        '../../lib/appenders/file',
-        {
-          globals: {
-            process: {
-              on: function (evt, listener) {
-                if (evt === 'exit') {
-                  exitListener = listener;
-                }
-              }
-            }
-          },
-          singleOnly: true,
-          requires: {
-            streamroller: {
-              RollingFileStream: function (filename) {
-                openedFiles.push(filename);
-
-                this.end = function () {
-                  openedFiles.shift();
-                };
-
-                this.on = function () {
-                };
-              }
-            }
-          }
-        }
-      );
-
-      for (let i = 0; i < 5; i += 1) {
-        fileAppender.appender(`test${i}`, null, 100);
-      }
-      assert.isNotEmpty(openedFiles);
-      exitListener();
-      return openedFiles;
-    },
-    'should close all open files': function (openedFiles) {
-      assert.isEmpty(openedFiles);
-    }
-  },
-
-  'with default fileAppender settings': {
-    topic: function () {
-      const that = this;
-      const testFile = path.join(__dirname, 'fa-default-test.log');
-      const logger = log4js.getLogger('default-settings');
-      remove(testFile);
-
-      log4js.clearAppenders();
-      log4js.addAppender(
-        require('../../lib/appenders/file').appender(testFile),
-        'default-settings'
-      );
-
-      logger.info('This should be in the file.');
-
-      setTimeout(() => {
-        fs.readFile(testFile, 'utf8', that.callback);
-      }, 100);
-    },
-    'should write log messages to the file': function (err, fileContents) {
-      assert.include(fileContents, `This should be in the file.${EOL}`);
-    },
-    'log messages should be in the basic layout format': function (err, fileContents) {
-      assert.match(
-        fileContents,
-        /\[\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}\.\d{3}] \[INFO] default-settings - /
-      );
-    }
-  },
-  'fileAppender subcategories': {
-    topic: function () {
-      const that = this;
-
-      log4js.clearAppenders();
-
-      function addAppender(cat) {
-        const testFile = path.join(
-          __dirname,
-          `fa-subcategories-test-${cat.join('-').replace(/\./g, '_')}.log`
-        );
-        remove(testFile);
-        log4js.addAppender(require('../../lib/appenders/file').appender(testFile), cat);
-        return testFile;
-      }
-
-      /* eslint-disable camelcase */
-      const file_sub1 = addAppender(['sub1']);
-
-      const file_sub1_sub12$sub1_sub13 = addAppender(['sub1.sub12', 'sub1.sub13']);
-
-      const file_sub1_sub12 = addAppender(['sub1.sub12']);
-
-
-      const logger_sub1_sub12_sub123 = log4js.getLogger('sub1.sub12.sub123');
-
-      const logger_sub1_sub13_sub133 = log4js.getLogger('sub1.sub13.sub133');
-
-      const logger_sub1_sub14 = log4js.getLogger('sub1.sub14');
-
-      const logger_sub2 = log4js.getLogger('sub2');
-
-
-      logger_sub1_sub12_sub123.info('sub1_sub12_sub123');
-
-      logger_sub1_sub13_sub133.info('sub1_sub13_sub133');
-
-      logger_sub1_sub14.info('sub1_sub14');
-
-      logger_sub2.info('sub2');
-
-
-      setTimeout(() => {
-        that.callback(null, {
-          file_sub1: fs.readFileSync(file_sub1).toString(),
-          file_sub1_sub12$sub1_sub13: fs.readFileSync(file_sub1_sub12$sub1_sub13).toString(),
-          file_sub1_sub12: fs.readFileSync(file_sub1_sub12).toString()
-        });
-      }, 3000);
-    },
-    'check file contents': function (err, fileContents) {
-      // everything but category 'sub2'
-      assert.match(
-        fileContents.file_sub1,
-        /^(\[\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}\.\d{3}] \[INFO] (sub1.sub12.sub123 - sub1_sub12_sub123|sub1.sub13.sub133 - sub1_sub13_sub133|sub1.sub14 - sub1_sub14)[\s\S]){3}$/ // jshint ignore:line
-      );
-      assert.ok(
-        fileContents.file_sub1.match(/sub123/) &&
-        fileContents.file_sub1.match(/sub133/) &&
-        fileContents.file_sub1.match(/sub14/)
-      );
-      assert.ok(!fileContents.file_sub1.match(/sub2/));
-
-      // only catgories starting with 'sub1.sub12' and 'sub1.sub13'
-      assert.match(
-        fileContents.file_sub1_sub12$sub1_sub13,
-        /^(\[\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}\.\d{3}] \[INFO] (sub1.sub12.sub123 - sub1_sub12_sub123|sub1.sub13.sub133 - sub1_sub13_sub133)[\s\S]){2}$/ // jshint ignore:line
-      );
-      assert.ok(
-        fileContents.file_sub1_sub12$sub1_sub13.match(/sub123/) &&
-        fileContents.file_sub1_sub12$sub1_sub13.match(/sub133/)
-      );
-      assert.ok(!fileContents.file_sub1_sub12$sub1_sub13.match(/sub14|sub2/));
-
-      // only catgories starting with 'sub1.sub12'
-      assert.match(
-        fileContents.file_sub1_sub12,
-        /^(\[\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}\.\d{3}] \[INFO] (sub1.sub12.sub123 - sub1_sub12_sub123)[\s\S]){1}$/ // jshint ignore:line
-      );
-      assert.ok(!fileContents.file_sub1_sub12.match(/sub14|sub2|sub13/));
-    }
-  },
-  'with a max file size and no backups': {
-    topic: function () {
-      const testFile = path.join(__dirname, 'fa-maxFileSize-test.log');
-      const logger = log4js.getLogger('max-file-size');
-      const that = this;
-      remove(testFile);
-      remove(`${testFile}.1`);
-      // log file of 100 bytes maximum, no backups
-      log4js.clearAppenders();
-      log4js.addAppender(
-        require('../../lib/appenders/file').appender(testFile, log4js.layouts.basicLayout, 100, 0),
-        'max-file-size'
-      );
-      logger.info('This is the first log message.');
-      logger.info('This is an intermediate log message.');
-      logger.info('This is the second log message.');
-      // wait for the file system to catch up
-      setTimeout(() => {
-        fs.readFile(testFile, 'utf8', that.callback);
-      }, 100);
-    },
-    'log file should only contain the second message': function (err, fileContents) {
-      assert.include(fileContents, 'This is the second log message.');
-      assert.equal(fileContents.indexOf('This is the first log message.'), -1);
-    },
-    'the number of files': {
-      topic: function () {
-        fs.readdir(__dirname, this.callback);
-      },
-      'starting with the test file name should be two': function (err, files) {
-        // there will always be one backup if you've specified a max log size
-        const logFiles = files.filter(
-          file => file.includes('fa-maxFileSize-test.log')
-        );
-        assert.equal(logFiles.length, 2);
-      }
-    }
-  },
-  'with a max file size and 2 backups': {
-    topic: function () {
-      const testFile = path.join(__dirname, 'fa-maxFileSize-with-backups-test.log');
-      const logger = log4js.getLogger('max-file-size-backups');
-      remove(testFile);
-      remove(`${testFile}.1`);
-      remove(`${testFile}.2`);
-
-      // log file of 50 bytes maximum, 2 backups
-      log4js.clearAppenders();
-      log4js.addAppender(
-        require('../../lib/appenders/file').appender(testFile, log4js.layouts.basicLayout, 50, 2),
-        'max-file-size-backups'
-      );
-      logger.info('This is the first log message.');
-      logger.info('This is the second log message.');
-      logger.info('This is the third log message.');
-      logger.info('This is the fourth log message.');
-      const that = this;
-      // give the system a chance to open the stream
-      setTimeout(() => {
-        fs.readdir(__dirname, (err, files) => {
-          if (files) {
-            that.callback(null, files.sort());
-          } else {
-            that.callback(err, files);
-          }
-        });
-      }, 200);
-    },
-    'the log files': {
-      topic: function (files) {
-        const logFiles = files.filter(
-          file => file.includes('fa-maxFileSize-with-backups-test.log')
-        );
-        return logFiles;
-      },
-      'should be 3': function (files) {
-        assert.equal(files.length, 3);
-      },
-      'should be named in sequence': function (files) {
-        assert.deepEqual(files, [
-          'fa-maxFileSize-with-backups-test.log',
-          'fa-maxFileSize-with-backups-test.log.1',
-          'fa-maxFileSize-with-backups-test.log.2'
-        ]);
-      },
-      'and the contents of the first file': {
-        topic: function (logFiles) {
-          fs.readFile(path.join(__dirname, logFiles[0]), 'utf8', this.callback);
-        },
-        'should be the last log message': function (contents) {
-          assert.include(contents, 'This is the fourth log message.');
-        }
-      },
-      'and the contents of the second file': {
-        topic: function (logFiles) {
-          fs.readFile(path.join(__dirname, logFiles[1]), 'utf8', this.callback);
-        },
-        'should be the third log message': function (contents) {
-          assert.include(contents, 'This is the third log message.');
-        }
-      },
-      'and the contents of the third file': {
-        topic: function (logFiles) {
-          fs.readFile(path.join(__dirname, logFiles[2]), 'utf8', this.callback);
-        },
-        'should be the second log message': function (contents) {
-          assert.include(contents, 'This is the second log message.');
-        }
-      }
-    }
-  },
-  'with a max file size and 2 compressed backups': {
-    topic: function () {
-      const testFile = path.join(__dirname, 'fa-maxFileSize-with-backups-compressed-test.log');
-      const logger = log4js.getLogger('max-file-size-backups');
-      remove(testFile);
-      remove(`${testFile}.1.gz`);
-      remove(`${testFile}.2.gz`);
-
-      // log file of 50 bytes maximum, 2 backups
-      log4js.clearAppenders();
-      log4js.addAppender(
-        require('../../lib/appenders/file').appender(
-          testFile, log4js.layouts.basicLayout, 50, 2, { compress: true }
-        ),
-        'max-file-size-backups'
-      );
-      logger.info('This is the first log message.');
-      logger.info('This is the second log message.');
-      logger.info('This is the third log message.');
-      logger.info('This is the fourth log message.');
-      const that = this;
-      // give the system a chance to open the stream
-      setTimeout(() => {
-        fs.readdir(__dirname, (err, files) => {
-          if (files) {
-            that.callback(null, files.sort());
-          } else {
-            that.callback(err, files);
-          }
-        });
-      }, 1000);
-    },
-    'the log files': {
-      topic: function (files) {
-        const logFiles = files.filter(
-          file => file.includes('fa-maxFileSize-with-backups-compressed-test.log')
-        );
-        return logFiles;
-      },
-      'should be 3': function (files) {
-        assert.equal(files.length, 3);
-      },
-      'should be named in sequence': function (files) {
-        assert.deepEqual(files, [
-          'fa-maxFileSize-with-backups-compressed-test.log',
-          'fa-maxFileSize-with-backups-compressed-test.log.1.gz',
-          'fa-maxFileSize-with-backups-compressed-test.log.2.gz'
-        ]);
-      },
-      'and the contents of the first file': {
-        topic: function (logFiles) {
-          fs.readFile(path.join(__dirname, logFiles[0]), 'utf8', this.callback);
-        },
-        'should be the last log message': function (contents) {
-          assert.include(contents, 'This is the fourth log message.');
-        }
-      },
-      'and the contents of the second file': {
-        topic: function (logFiles) {
-          zlib.gunzip(fs.readFileSync(path.join(__dirname, logFiles[1])), this.callback);
-        },
-        'should be the third log message': function (contents) {
-          assert.include(contents.toString('utf8'), 'This is the third log message.');
-        }
-      },
-      'and the contents of the third file': {
-        topic: function (logFiles) {
-          zlib.gunzip(fs.readFileSync(path.join(__dirname, logFiles[2])), this.callback);
-        },
-        'should be the second log message': function (contents) {
-          assert.include(contents.toString('utf8'), 'This is the second log message.');
-        }
-      }
-    }
-  }
-}).addBatch({
-  configure: {
-    'with fileAppender': {
-      topic: function () {
-        // this config file defines one file appender (to ./tmp-tests.log)
-        // and sets the log level for "tests" to WARN
-        log4js.configure('./test/vows/log4js.json');
-        const logger = log4js.getLogger('tests');
-        logger.info('this should not be written to the file');
-        logger.warn('this should be written to the file');
-
-        fs.readFile('tmp-tests.log', 'utf8', this.callback);
-      },
-      'should load appender configuration from a json file': function (err, contents) {
-        assert.include(contents, `this should be written to the file${EOL}`);
-        assert.equal(contents.indexOf('this should not be written to the file'), -1);
-      }
-    }
-  }
-}).addBatch({
-  'when underlying stream errors': {
-    topic: function () {
-      let consoleArgs;
-      let errorHandler;
-
-      const fileAppender = sandbox.require(
-        '../../lib/appenders/file',
-        {
-          globals: {
-            console: {
-              error: function () {
-                consoleArgs = Array.prototype.slice.call(arguments);
-              }
-            }
-          },
-          requires: {
-            streamroller: {
-              RollingFileStream: function () {
-                this.end = function () {
-                };
-                this.on = function (evt, cb) {
-                  if (evt === 'error') {
-                    errorHandler = cb;
-                  }
-                };
-              }
-            }
-          }
-        }
-      );
-
-      fileAppender.appender('test1.log', null, 100);
-      errorHandler({ error: 'aargh' });
-      return consoleArgs;
-    },
-    'should log the error to console.error': function (consoleArgs) {
-      assert.isNotEmpty(consoleArgs);
-      assert.equal(consoleArgs[0], 'log4js.fileAppender - Writing to file %s, error happened ');
-      assert.equal(consoleArgs[1], 'test1.log');
-      assert.equal(consoleArgs[2].error, 'aargh');
-    }
-  }
-})
-.export(module);