diff --git a/app/controllers/cards/comments_controller.rb b/app/controllers/cards/comments_controller.rb
index 7aed33c8c8..2243c1bdb4 100644
--- a/app/controllers/cards/comments_controller.rb
+++ b/app/controllers/cards/comments_controller.rb
@@ -30,7 +30,7 @@ def update
 
     respond_to do |format|
       format.turbo_stream
-      format.json { head :no_content }
+      format.json { render :show }
     end
   end
 
diff --git a/test/controllers/cards/comments_controller_test.rb b/test/controllers/cards/comments_controller_test.rb
index 5cebe22dea..3e311ae203 100644
--- a/test/controllers/cards/comments_controller_test.rb
+++ b/test/controllers/cards/comments_controller_test.rb
@@ -102,6 +102,10 @@ class Cards::CommentsControllerTest < ActionDispatch::IntegrationTest
 
     assert_response :success
     assert_equal "Flat update", comment.reload.body.to_plain_text
+
+    json = @response.parsed_body
+    assert_equal comment.id, json["id"]
+    assert_equal "Flat update", json["body"]["plain_text"]
   end
 
   test "update as JSON" do
@@ -111,6 +115,11 @@ class Cards::CommentsControllerTest < ActionDispatch::IntegrationTest
 
     assert_response :success
     assert_equal "Updated comment", comment.reload.body.to_plain_text
+
+    json = @response.parsed_body
+    assert_equal comment.id, json["id"]
+    assert_equal "Updated comment", json["body"]["plain_text"]
+    assert_equal comment.creator.id, json["creator"]["id"]
   end
 
   test "edit a comment that contains a mention" do