diff --git a/test/integration/fixtures/regression/issue-1417.fixture.js b/test/integration/fixtures/regression/issue-1417.fixture.js
index 13ce053784..2f9b6074af 100644
--- a/test/integration/fixtures/regression/issue-1417.fixture.js
+++ b/test/integration/fixtures/regression/issue-1417.fixture.js
@@ -10,7 +10,7 @@ it('fails exactly once when a global error is thrown synchronously and done erro
     done(new Error('test error'));
   }, 1); // Not 0 - it will 'succeed', but won't test the breaking condition
 
-  throw new Error('sync error');
+  throw new Error('sync error a');
 });
 
 it('fails exactly once when a global error is thrown synchronously and done completes', function (done) {
@@ -18,5 +18,5 @@ it('fails exactly once when a global error is thrown synchronously and done comp
     done();
   }, 1); // Not 0 - it will 'succeed', but won't test the breaking condition
 
-  throw new Error('sync error');
+  throw new Error('sync error b');
 });
diff --git a/test/integration/regression.spec.js b/test/integration/regression.spec.js
index 1c0466b180..70bde856d4 100644
--- a/test/integration/regression.spec.js
+++ b/test/integration/regression.spec.js
@@ -1,6 +1,5 @@
 'use strict';
 
-var assert = require('assert');
 var fs = require('fs');
 var path = require('path');
 var run = require('./helpers').runMocha;
@@ -19,11 +18,10 @@ describe('regressions', function () {
         done(err);
         return;
       }
-      assert.equal(occurences('testbody1'), 1);
-      assert.equal(occurences('testbody2'), 1);
-      assert.equal(occurences('testbody3'), 1);
-
-      assert.equal(res.code, 1);
+      expect(res, 'to have failed');
+      expect(occurences('testbody1'), 'to be', 1);
+      expect(occurences('testbody2'), 'to be', 1);
+      expect(occurences('testbody3'), 'to be', 1);
       done();
     });
   });
@@ -31,8 +29,8 @@ describe('regressions', function () {
   it('should not duplicate mocha.opts args in process.argv', function () {
     var processArgv = process.argv.join('');
     var mochaOpts = fs.readFileSync(path.join(__dirname, '..', 'mocha.opts'), 'utf-8').split(/[\s]+/).join('');
-    assert.notEqual(processArgv.indexOf(mochaOpts), -1, 'process.argv missing mocha.opts');
-    assert.equal(processArgv.indexOf(mochaOpts), processArgv.lastIndexOf(mochaOpts), 'process.argv contains duplicated mocha.opts');
+    expect(processArgv.indexOf(mochaOpts), 'not to be', -1)
+      .and('to be', processArgv.lastIndexOf(mochaOpts));
   });
 
   it('issue-1794: Can\'t --require custom UI and use it', function (done) {
@@ -43,7 +41,7 @@ describe('regressions', function () {
         done(err);
         return;
       }
-      assert.equal(res.code, 0, 'Custom UI should be loaded');
+      expect(res, 'to have passed');
       done();
     });
   });
@@ -58,13 +56,13 @@ describe('regressions', function () {
         done(err);
         return;
       }
-      assert.equal(/process out of memory/.test(res.output), false, 'fixture\'s process out of memory!');
-      assert.equal(res.code, 0, 'Runnable fn (it/before[Each]/after[Each]) references should be deleted to avoid memory leaks');
+      expect(res, 'not to contain output', 'process out of memory')
+        .and('to have passed');
       done();
     });
   });
 
-  describe('issue-2286: after doesn\'t execute if test was skipped in beforeEach', function () {
+  describe("issue-2286: after doesn't execute if test was skipped in beforeEach", function () {
     var afterWasRun = false;
     describe('suite with skipped test for meta test', function () {
       beforeEach(function () { this.skip(); });
@@ -72,7 +70,7 @@ describe('regressions', function () {
       it('should be pending', function () {});
     });
     after('meta test', function () {
-      expect(afterWasRun).to.be.ok();
+      expect(afterWasRun, 'to be', true);
     });
   });
 
@@ -82,10 +80,9 @@ describe('regressions', function () {
         done(err);
         return;
       }
-      assert.equal(res.stats.pending, 0);
-      assert.equal(res.stats.passes, 0);
-      assert.equal(res.stats.failures, 1);
-      assert.equal(res.code, 1);
+      expect(res, 'to have failed')
+        .and('not to have pending tests')
+        .and('to have failed test count', 1);
       done();
     });
   });
@@ -97,10 +94,9 @@ describe('regressions', function () {
         done(err);
         return;
       }
-      assert.equal(res.stats.pending, 0);
-      assert.equal(res.stats.passes, 2);
-      assert.equal(res.stats.failures, 0);
-      assert.equal(res.code, 0);
+      expect(res, 'to have passed')
+        .and('not to have pending tests')
+        .and('to have passed test count', 2);
       done();
     });
   });
@@ -111,10 +107,9 @@ describe('regressions', function () {
         done(err);
         return;
       }
-      assert.equal(res.stats.pending, 0);
-      assert.equal(res.stats.passes, 1);
-      assert.equal(res.stats.failures, 0);
-      assert.equal(res.code, 0);
+      expect(res, 'to have passed')
+        .and('not to have pending tests')
+        .and('to have passed test count', 1);
       done();
     });
   });
@@ -125,17 +120,14 @@ describe('regressions', function () {
         done(err);
         return;
       }
-      assert.equal(res.stats.pending, 0);
-      assert.equal(res.stats.passes, 0);
-      assert.equal(res.stats.failures, 2);
-
-      assert.equal(res.failures[0].title,
-        'fails exactly once when a global error is thrown synchronously and done errors');
-      assert.equal(res.failures[0].err.message, 'sync error');
-      assert.equal(res.failures[1].title,
-        'fails exactly once when a global error is thrown synchronously and done completes');
-      assert.equal(res.failures[1].err.message, 'sync error');
-      assert.equal(res.code, 2);
+      expect(res, 'to have failed with errors', 'sync error a', 'sync error b')
+        .and('to have exit code', 2)
+        .and('not to have passed tests')
+        .and('not to have pending tests')
+        .and('to have failed test order', [
+          'fails exactly once when a global error is thrown synchronously and done errors',
+          'fails exactly once when a global error is thrown synchronously and done completes'
+        ]);
       done();
     });
   });