diff --git a/test/tests/creation_date.js b/test/tests/creation_date.js
index 8048fbd..ca813f1 100644
--- a/test/tests/creation_date.js
+++ b/test/tests/creation_date.js
@@ -8,7 +8,7 @@ exports['test creation date'] = function (assert, cb) {
       sources = {'dummy': ''},
       result = jsxgettext.generate(sources, opts);
 
-  var parsed = gettextParser.po.parse(new Buffer(result));
+  var parsed = gettextParser.po.parse(Buffer.from(result));
   var timestamp = parsed.headers["pot-creation-date"].match(/(\d{4}-\d{2}-\d{2} \d{2}:\d{2}[+-]\d{4})/)[1];
   assert.ok(timestamp.length > 0, 'Valid timestamp');
   // Timestamp should be at most 2 minutes in the past since it is truncated to minute
diff --git a/test/tests/po_custom_headers.js b/test/tests/po_custom_headers.js
index b20571b..a6476e4 100644
--- a/test/tests/po_custom_headers.js
+++ b/test/tests/po_custom_headers.js
@@ -11,7 +11,7 @@ exports['test po custom headers'] = function (assert, cb) {
     },
     sources = {'dummy': ''},
     result = jsxgettext.generate(sources, opts),
-    parsed = gettextParser.po.parse(new Buffer(result));
+    parsed = gettextParser.po.parse(Buffer.from(result));
 
   var headerCustom = {
     "project-id-version": "MyProject 1.0",
diff --git a/test/tests/po_header.js b/test/tests/po_header.js
index ad3da19..f0e2d0c 100644
--- a/test/tests/po_header.js
+++ b/test/tests/po_header.js
@@ -7,7 +7,7 @@ exports['test po header'] = function (assert, cb) {
   var opts = {},
       sources = {'dummy': ''},
       result = jsxgettext.generate(sources, opts),
-      parsed = gettextParser.po.parse(new Buffer(result));
+      parsed = gettextParser.po.parse(Buffer.from(result));
 
   var headerDefaults = {
     "project-id-version": "PACKAGE VERSION",