@@ -5,7 +5,7 @@
                      create_example_data_helper)
 
 from github3 import GitHubError
-from github3.pulls import PullRequest
+from github3.pulls import PullRequest, ReviewComment
 
 get_pr_example_data = create_example_data_helper('pull_request_example')
 
@@ -195,3 +195,84 @@ def test_review_comments(self):
             params={'per_page': 100},
             headers={}
         )
+
+
+class TestReviewComment(UnitHelper):
+
+    """Unit tests for the ReviewComment class."""
+
+    described_class = ReviewComment
+    example_data = {
+        "url": ("https://api.github.com/repos/octocat/Hello-World/pulls/"
+                "comments/1"),
+        "id": 1,
+        "diff_hunk": ("@@ -16,33 +16,40 @@ public class Connection :"
+                      " IConnection..."),
+        "path": "file1.txt",
+        "position": 1,
+        "original_position": 4,
+        "commit_id": "6dcb09b5b57875f334f61aebed695e2e4193db5e",
+        "original_commit_id": "9c48853fa3dc5c1c3d6f1f1cd1f2743e72652840",
+        "user": {
+            "login": "octocat",
+            "id": 1,
+            "avatar_url": "https://github.com/images/error/octocat_happy.gif",
+            "gravatar_id": "",
+            "url": "https://api.github.com/users/octocat",
+            "html_url": "https://github.com/octocat",
+            "followers_url": "https://api.github.com/users/octocat/followers",
+            "following_url": ("https://api.github.com/users/octocat/following"
+                              "{/other_user}"),
+            "gists_url": ("https://api.github.com/users/octocat/gists"
+                          "{/gist_id}"),
+            "starred_url": ("https://api.github.com/users/octocat/starred"
+                            "{/owner}{/repo}"),
+            "subscriptions_url": ("https://api.github.com/users/octocat"
+                                  "/subscriptions"),
+            "organizations_url": "https://api.github.com/users/octocat/orgs",
+            "repos_url": "https://api.github.com/users/octocat/repos",
+            "events_url": ("https://api.github.com/users/octocat/events"
+                           "{/privacy}"),
+            "received_events_url": ("https://api.github.com/users/octocat"
+                                    "/received_events"),
+            "type": "User",
+            "site_admin": False
+        },
+        "body": "Great stuff",
+        "created_at": "2011-04-14T16:00:49Z",
+        "updated_at": "2011-04-14T16:00:49Z",
+        "html_url": ("https://github.com/octocat/Hello-World/pull/1"
+                     "#discussion-diff-1"),
+        "pull_request_url": ("https://api.github.com/repos/octocat/"
+                             "Hello-World/pulls/1"),
+        "_links": {
+            "self": {
+                "href": ("https://api.github.com/repos/octocat/Hello-World/"
+                         "pulls/comments/1")
+            },
+            "html": {
+                "href": ("https://github.com/octocat/Hello-World/pull/1"
+                         "#discussion-diff-1")
+            },
+            "pull_request": {
+                "href": ("https://api.github.com/repos/octocat/"
+                         "Hello-World/pulls/1")
+            }
+        }
+    }
+
+    def test_reply(self):
+        """Verify the request to reply to a review comment."""
+        self.instance.reply('foo')
+
+        self.post_called_with(
+            url_for('comments'),
+            data={'body': 'foo', 'in_reply_to': '1'}
+        )
+
+    def test_reply_requires_authentication(self):
+        """Verify that a user needs to be authenticated to reply."""
+        self.session.has_auth.return_value = False
+
+        with pytest.raises(GitHubError):
+            self.instance.reply('')