diff --git a/chai-jquery/chai-jquery-tests.ts b/chai-jquery/chai-jquery-tests.ts
index 97ed7a36a7..45c9981f5f 100644
--- a/chai-jquery/chai-jquery-tests.ts
+++ b/chai-jquery/chai-jquery-tests.ts
@@ -1,6 +1,8 @@
 /// <reference path="../chai/chai.d.ts" />
 /// <reference path="chai-jquery.d.ts" />
 
+// tests taken from https://github.com/chaijs/chai-jquery
+
 declare var $;
 var expect = chai.expect;
 
@@ -17,6 +19,7 @@ function test_css() {
 function test_data() {
     expect($('#foo')).to.have.data('toggle');
     expect($('#foo')).to.have.css('toggle', 'true');
+    expect($('body')).to.have.css('font-family').match(/sans-serif/);
 }
 
 function test_class() {
@@ -59,10 +62,30 @@ function test_disabled() {
     expect($('#foo')).to.be.disabled;
 }
 
+function test_empty() {
+    $('.empty').should.be.empty;
+    expect($('body')).not.to.be.empty;
+}
+
+function test_exist() {
+    $('#exists').should.exist;
+    expect($('#nonexistent')).not.to.exist;
+}
+
+function test_match_selector() {
+    $('input').should.match('#foo');
+}
+
+function test_contain() {
+    $('body').should.contain('text');
+    expect($('#content')).to.contain('text');
+}
+
 function test_be_selector() {
     expect($('#foo')).to.be(':empty');
 }
 
 function test_have_selector() {
+    $('body').should.have('h1');
     expect($('#foo')).to.have('div');
 }
\ No newline at end of file
diff --git a/chai/chai.d.ts b/chai/chai.d.ts
index 070765e00d..9d649a17c5 100644
--- a/chai/chai.d.ts
+++ b/chai/chai.d.ts
@@ -12,7 +12,25 @@ declare module chai {
         (target: any): Expect;
     }
 
-    interface Expect extends LanguageChains, NumericComparison, TypeComparison {
+    interface Assertions {
+        attr(name, value?);
+        css(name, value?);
+        data(name, value?);
+        class(className);
+        id(id);
+        html(html);
+        text(text);
+        value(value);
+        visible;
+        hidden;
+        selected;
+        checked;
+        disabled;
+        empty;
+        exist;
+    }
+
+    interface Expect extends LanguageChains, NumericComparison, TypeComparison, Assertions {
         not: Expect;
         deep: Deep;
         a: TypeComparison;