diff --git a/lib/tags/extends.test.js b/lib/tags/extends.test.js
index 8166912a..dbc985a6 100644
--- a/lib/tags/extends.test.js
+++ b/lib/tags/extends.test.js
@@ -1,5 +1,4 @@
-var testCase = require('nodeunit').testCase,
-  swig = require('../../index');
+var swig = require('../../index');
 
 describe('Tag: extends', function () {
 
diff --git a/lib/tags/filter.test.js b/lib/tags/filter.test.js
index 234b46d9..dfef0ddd 100644
--- a/lib/tags/filter.test.js
+++ b/lib/tags/filter.test.js
@@ -1,27 +1,21 @@
-var testCase = require('nodeunit').testCase,
-  swig = require('../../index');
+var swig = require('../../index');
 
-exports.filter = testCase({
-  setUp: function (callback) {
+describe('Tag: filter', function () {
+  beforeEach(function () {
     swig.init({});
-    callback();
-  },
+  });
 
-  basic: function (test) {
-    var tpl = swig.compile('{% filter capitalize %}oh HEY there{% endfilter %}');
-    test.strictEqual(tpl({}), 'Oh hey there');
-    test.done();
-  },
+  it('accepts a filter as an argument', function () {
+    swig.compile('{% filter capitalize %}oh HEY there{% endfilter %}')({}).should.equal('Oh hey there');
+  });
 
-  'complex content': function (test) {
+  it('works across complex content', function () {
     var tpl = swig.compile('{% filter capitalize %}oh {{ foo }} {% if here %}here{% else %}there{% endif %}{% endfilter %}');
-    test.strictEqual(tpl({ foo: 'HEY', here: true }), 'Oh hey here');
-    test.done();
-  },
+    tpl({ foo: 'HEY', here: true }).should.equal('Oh hey here');
+  });
 
-  args: function (test) {
+  it('can accept arguments for the filter', function () {
     var tpl = swig.compile('{% filter replace "\\." "!" "g" %}hi. my name is paul.{% endfilter %}');
-    test.strictEqual(tpl({}), 'hi! my name is paul!');
-    test.done();
-  }
+    tpl({}).should.equal('hi! my name is paul!');
+  });
 });