diff --git a/app/views/reports/_category_row.html.erb b/app/views/reports/_category_row.html.erb
index 709218038..449cac8bb 100644
--- a/app/views/reports/_category_row.html.erb
+++ b/app/views/reports/_category_row.html.erb
@@ -3,7 +3,7 @@
   is_sub = level == :subcategory
 %>
 
-<div class="grid grid-cols-4 items-center text-secondary text-sm py-3 px-4 lg:px-6 <%= is_sub ? "pl-7 lg:pl-9" : "" %>">
+<div data-category="category-<%= item[:category_id] %>" class="grid grid-cols-4 items-center text-secondary text-sm py-3 px-4 lg:px-6 <%= is_sub ? "pl-7 lg:pl-9" : "" %>">
   <div class="col-span-2 flex items-center gap-2">
     <% if is_sub %>
       <div class="text-subdued">
diff --git a/app/views/reports/_trends_insights.html.erb b/app/views/reports/_trends_insights.html.erb
index 5f5f865c7..5e1417285 100644
--- a/app/views/reports/_trends_insights.html.erb
+++ b/app/views/reports/_trends_insights.html.erb
@@ -8,7 +8,7 @@
       <% if trends_data.any? %>
         <div class="bg-container-inset rounded-xl p-1 overflow-x-auto">
           <div class="w-max sm:w-full">
-            <div class="grid grid-cols-5 items-center uppercase text-xs font-medium text-secondary px-4 py-2">
+            <div role="columnheader" class="grid grid-cols-5 items-center uppercase text-xs font-medium text-secondary px-4 py-2">
               <div class="font-medium text-secondary"><%= t("reports.trends.month") %></div>
               <div class="text-right font-medium text-secondary"><%= t("reports.trends.income") %></div>
               <div class="text-right font-medium text-secondary"><%= t("reports.trends.expenses") %></div>
diff --git a/test/controllers/reports_controller_test.rb b/test/controllers/reports_controller_test.rb
index a4524382d..afc81abd3 100644
--- a/test/controllers/reports_controller_test.rb
+++ b/test/controllers/reports_controller_test.rb
@@ -82,7 +82,9 @@ class ReportsControllerTest < ActionDispatch::IntegrationTest
     get reports_path(period_type: :monthly)
     assert_response :ok
     assert_select "h2", text: I18n.t("reports.trends.title")
-    assert_select "th", text: I18n.t("reports.trends.month")
+    assert_select '[role="columnheader"]' do
+      assert_select "div", text: I18n.t("reports.trends.month")
+    end
   end
 
   test "index handles invalid date parameters gracefully" do
@@ -236,6 +238,12 @@ class ReportsControllerTest < ActionDispatch::IntegrationTest
 
     get reports_path(period_type: :monthly)
     assert_response :ok
-    assert_select "table.w-full"
+
+    # Parent category
+    assert_select "div[data-category='category-#{parent_category.id}']", text: /^Entertainment/
+
+    # Subcategories
+    assert_select "div[data-category='category-#{subcategory_movies.id}']", text: /^Movies/
+    assert_select "div[data-category='category-#{subcategory_games.id}']", text: /^Games/
   end
 end