diff --git a/common/static/coffee/spec/discussion/view/discussion_thread_view_spec.coffee b/common/static/coffee/spec/discussion/view/discussion_thread_view_spec.coffee
index 84512cd4e9..01e3bc25c9 100644
--- a/common/static/coffee/spec/discussion/view/discussion_thread_view_spec.coffee
+++ b/common/static/coffee/spec/discussion/view/discussion_thread_view_spec.coffee
@@ -40,6 +40,32 @@ describe "DiscussionThreadView", ->
         else
             expect(view.$el.find(".load-response-button").length).toEqual(0)
 
+    describe "closed and open Threads", ->
+        checkCommentForm = (originallyClosed, mode) ->
+            threadData = DiscussionViewSpecHelper.makeThreadWithProps({closed: originallyClosed})
+            thread = new Thread(threadData)
+            view = new DiscussionThreadView({ model: thread, el: $("#fixture-element"), mode: mode})
+            renderWithContent(view, {resp_total: 1, children: [{}]})
+            if mode == "inline"
+              view.expand()
+            spyOn(DiscussionUtil, "updateWithUndo").andCallFake(
+              (model, updates, safeAjaxParams, errorMsg) ->
+                model.set(updates)
+            )
+            expect(view.$('.comment-form').closest('li').is(":visible")).toBe(not originallyClosed)
+            expect(view.$(".discussion-reply-new").is(":visible")).toBe(not originallyClosed)
+            view.$(".action-close").click()
+            expect(view.$('.comment-form').closest('li').is(":visible")).toBe(originallyClosed)
+            expect(view.$(".discussion-reply-new").is(":visible")).toBe(originallyClosed)
+
+        _.each(["tab", "inline"], (mode) =>
+                it 'Test that in #{mode} mode when a closed thread is opened the comment form is displayed', ->
+                        checkCommentForm(true, mode)
+
+                it 'Test that in #{mode} mode when a open thread is closed the comment form is hidden', ->
+                        checkCommentForm(false, mode)
+        )
+
     describe "tab mode", ->
         beforeEach ->
             @view = new DiscussionThreadView({ model: @thread, el: $("#fixture-element"), mode: "tab"})
diff --git a/common/static/coffee/spec/discussion/view/thread_response_view_spec.coffee b/common/static/coffee/spec/discussion/view/thread_response_view_spec.coffee
index 24776cc0ca..2b4f125a2a 100644
--- a/common/static/coffee/spec/discussion/view/thread_response_view_spec.coffee
+++ b/common/static/coffee/spec/discussion/view/thread_response_view_spec.coffee
@@ -3,13 +3,42 @@ describe 'ThreadResponseView', ->
         DiscussionSpecHelper.setUpGlobals()
         DiscussionSpecHelper.setUnderscoreFixtures()
 
+        @thread = new Thread({"thread_type": "discussion"})
         @response = new Comment {
-            children: [{}, {}]
+            children: [{}, {}],
+            thread: @thread,
         }
         @view = new ThreadResponseView({model: @response, el: $("#fixture-element")})
         spyOn(ThreadResponseShowView.prototype, "render")
         spyOn(ResponseCommentView.prototype, "render")
 
+    describe 'closed and open Threads', ->
+        checkCommentForm = (closed) ->
+            thread = new Thread({"thread_type": "discussion", "closed": closed})
+            commentData = {
+                id: "dummy",
+                user_id: "567",
+                course_id: "TestOrg/TestCourse/TestRun",
+                body: "this is a comment",
+                created_at: "2013-04-03T20:08:39Z",
+                abuse_flaggers: [],
+                type: "comment",
+                children: [],
+                thread: thread,
+            }
+            comment = new Comment(commentData)
+            view = new ThreadResponseView({
+                model: comment, el: $("#fixture-element"),
+            })
+            view.render()
+            expect(view.$('.comment-form').closest('li').is(":visible")).toBe(not closed)
+
+        it 'hides comment form when thread is closed', ->
+            checkCommentForm(true)
+
+        it 'show comment form when thread is open', ->
+            checkCommentForm(false)
+
     describe 'renderComments', ->
         it 'hides "show comments" link if collapseComments is not set', ->
             @view.render()
@@ -17,7 +46,7 @@ describe 'ThreadResponseView', ->
             expect(@view.$(".action-show-comments")).not.toBeVisible()
 
         it 'hides "show comments" link if collapseComments is set but response has no comments', ->
-            @response = new Comment { children: [] }
+            @response = new Comment { children: [], thread: @thread }
             @view = new ThreadResponseView({
                 model: @response, el: $("#fixture-element"),
                 collapseComments: true
diff --git a/common/static/coffee/src/discussion/views/discussion_thread_view.coffee b/common/static/coffee/src/discussion/views/discussion_thread_view.coffee
index 746f506ea9..82652b6370 100644
--- a/common/static/coffee/src/discussion/views/discussion_thread_view.coffee
+++ b/common/static/coffee/src/discussion/views/discussion_thread_view.coffee
@@ -55,6 +55,7 @@ if Backbone?
     attrRenderer: $.extend({}, DiscussionContentView.prototype.attrRenderer, {
       closed: (closed) ->
         @$(".discussion-reply-new").toggle(not closed)
+        @$('.comment-form').closest('li').toggle(not closed)
         @renderAddResponseButton()
     })
 
diff --git a/common/static/coffee/src/discussion/views/thread_response_view.coffee b/common/static/coffee/src/discussion/views/thread_response_view.coffee
index e6a3412c59..da37313d52 100644
--- a/common/static/coffee/src/discussion/views/thread_response_view.coffee
+++ b/common/static/coffee/src/discussion/views/thread_response_view.coffee
@@ -28,6 +28,8 @@ if Backbone?
 
       @renderShowView()
       @renderAttrs()
+      if @model.get("thread").get("closed")
+        @hideCommentForm()
 
       @renderComments()
       @