diff --git a/test/tap/dateFileAppender-test.js b/test/tap/dateFileAppender-test.js
index 0c77c58..3a0024c 100644
--- a/test/tap/dateFileAppender-test.js
+++ b/test/tap/dateFileAppender-test.js
@@ -65,8 +65,8 @@ test('../../lib/appenders/dateFile', (batch) => {
                 openedFiles.shift();
               };
 
-              this.write = function () {
-                return true;
+              this.write = function (data, encoding, cb) {
+                return cb();
               };
             }
           }
diff --git a/test/tap/fileAppender-test.js b/test/tap/fileAppender-test.js
index 1a96892..1d5b817 100644
--- a/test/tap/fileAppender-test.js
+++ b/test/tap/fileAppender-test.js
@@ -68,8 +68,8 @@ test('log4js fileAppender', (batch) => {
                 openedFiles.shift();
               };
 
-              this.write = function () {
-                return true;
+              this.write = function (data, encoding, cb) {
+                return cb();
               };
 
               this.on = function () {