diff --git a/app/controllers/concerns/events_timeline.rb b/app/controllers/concerns/events_timeline.rb
index 0d50d2093..c051c370d 100644
--- a/app/controllers/concerns/events_timeline.rb
+++ b/app/controllers/concerns/events_timeline.rb
@@ -29,12 +29,11 @@ module EventsTimeline
     end
 
     def user_events
-      Event.where(card: user_cards)
+      Event.where(collection: collection_filter).where(eventable: user_cards)
     end
 
     def user_cards
       Current.user.accessible_cards
         .published_or_drafted_by(Current.user)
-        .where(collection_id: collection_filter)
     end
 end
diff --git a/app/controllers/terminals_controller.rb b/app/controllers/terminals_controller.rb
index 728ff9983..e2840773a 100644
--- a/app/controllers/terminals_controller.rb
+++ b/app/controllers/terminals_controller.rb
@@ -1,6 +1,6 @@
 class TerminalsController < ApplicationController
   def show
-    @events = Event.where(card: Current.user.accessible_cards, creator: Current.user).chronologically.reverse_order.limit(20)
+    @events = Event.where(eventable: Current.user.accessible_cards, creator: Current.user).chronologically.reverse_order.limit(20)
   end
 
   def edit
diff --git a/app/helpers/events_helper.rb b/app/helpers/events_helper.rb
index 53732b327..1bcacaff5 100644
--- a/app/helpers/events_helper.rb
+++ b/app/helpers/events_helper.rb
@@ -45,10 +45,13 @@ module EventsHelper
     start_time = day.beginning_of_day
     end_time = day.end_of_day
 
-    accessible_events = Event.joins(card: :collection)
-      .merge(Current.user.collections)
+    collections = Current.user.collections
+    collections = collections.where(id: params[:collection_ids]) if params[:collection_ids].present?
+
+    # TODO: this needs tidying up
+    accessible_events = Event.where(eventable_type: "Card")
       .where(created_at: start_time..end_time)
-      .where(cards: { collection_id: params[:collection_ids].presence || Current.user.collection_ids })
+      .where(collection: collections)
 
     headers = {
       "Added" => accessible_events.where(action: "published").count,
@@ -66,30 +69,30 @@ module EventsHelper
     case event.action
     when "assigned"
       if event.assignees.include?(Current.user)
-        "#{ event.creator == Current.user ? "You" : event.creator.name } will handle <span style='color: var(--card-color)'>#{ event.card.title }</span>".html_safe
+        "#{ event.creator == Current.user ? "You" : event.creator.name } will handle <span style='color: var(--card-color)'>#{ event.eventable.title }</span>".html_safe
       else
-        "#{ event.creator == Current.user ? "You" : event.creator.name } assigned #{ event.assignees.pluck(:name).to_sentence } to <span style='color: var(--card-color)'>#{ event.card.title }</span>".html_safe
+        "#{ event.creator == Current.user ? "You" : event.creator.name } assigned #{ event.assignees.pluck(:name).to_sentence } to <span style='color: var(--card-color)'>#{ event.eventable.title }</span>".html_safe
       end
     when "unassigned"
-      "#{ event.creator == Current.user ? "You" : event.creator.name } unassigned #{ event.assignees.include?(Current.user) ? "yourself" : event.assignees.pluck(:name).to_sentence } from <span style='color: var(--card-color)'>#{ event.card.title }</span>".html_safe
+      "#{ event.creator == Current.user ? "You" : event.creator.name } unassigned #{ event.assignees.include?(Current.user) ? "yourself" : event.assignees.pluck(:name).to_sentence } from <span style='color: var(--card-color)'>#{ event.eventable.title }</span>".html_safe
     when "commented"
-      "#{ event.creator == Current.user ? "You" : event.creator.name } commented on <span style='color: var(--card-color)'>#{ event.card.title }</span>".html_safe
+      "#{ event.creator == Current.user ? "You" : event.creator.name } commented on <span style='color: var(--card-color)'>#{ event.eventable.title }</span>".html_safe
     when "published"
-      "#{ event.creator == Current.user ? "You" : event.creator.name } added <span style='color: var(--card-color)'>#{ event.card.title }</span>".html_safe
+      "#{ event.creator == Current.user ? "You" : event.creator.name } added <span style='color: var(--card-color)'>#{ event.eventable.title }</span>".html_safe
     when "closed"
-      "#{ event.creator == Current.user ? "You" : event.creator.name } closed <span style='color: var(--card-color)'>#{ event.card.title }</span>".html_safe
+      "#{ event.creator == Current.user ? "You" : event.creator.name } closed <span style='color: var(--card-color)'>#{ event.eventable.title }</span>".html_safe
     when "staged"
-      "#{event.creator == Current.user ? "You" : event.creator.name} moved <span style='color: var(--card-color)'>#{ event.card.title }</span> to the #{event.stage_name} stage".html_safe
+      "#{event.creator == Current.user ? "You" : event.creator.name} moved <span style='color: var(--card-color)'>#{ event.eventable.title }</span> to the #{event.stage_name} stage".html_safe
     when "unstaged"
-      "#{event.creator == Current.user ? "You" : event.creator.name} moved <span style='color: var(--card-color)'>#{ event.card.title }</span> out ofthe #{event.stage_name} stage".html_safe
+      "#{event.creator == Current.user ? "You" : event.creator.name} moved <span style='color: var(--card-color)'>#{ event.eventable.title }</span> out ofthe #{event.stage_name} stage".html_safe
     when "due_date_added"
-      "#{event.creator == Current.user ? "You" : event.creator.name} set the date to #{event.particulars.dig('particulars', 'due_date').to_date.strftime('%B %-d')} on <span style='color: var(--card-color)'>#{ event.card.title }</span>".html_safe
+      "#{event.creator == Current.user ? "You" : event.creator.name} set the date to #{event.particulars.dig('particulars', 'due_date').to_date.strftime('%B %-d')} on <span style='color: var(--card-color)'>#{ event.eventable.title }</span>".html_safe
     when "due_date_changed"
-      "#{event.creator == Current.user ? "You" : event.creator.name} changed the date to #{event.particulars.dig('particulars', 'due_date').to_date.strftime('%B %-d')} on <span style='color: var(--card-color)'>#{ event.card.title }</span>".html_safe
+      "#{event.creator == Current.user ? "You" : event.creator.name} changed the date to #{event.particulars.dig('particulars', 'due_date').to_date.strftime('%B %-d')} on <span style='color: var(--card-color)'>#{ event.eventable.title }</span>".html_safe
     when "due_date_removed"
-      "#{event.creator == Current.user ? "You" : event.creator.name} removed the date on <span style='color: var(--card-color)'>#{ event.card.title }</span>"
+      "#{event.creator == Current.user ? "You" : event.creator.name} removed the date on <span style='color: var(--card-color)'>#{ event.eventable.title }</span>"
     when "title_changed"
-      "#{event.creator == Current.user ? "You" : event.creator.name} renamed <span style='color: var(--card-color)'>#{ event.card.title }</span> (was: '#{event.particulars.dig('particulars', 'old_title')})'".html_safe
+      "#{event.creator == Current.user ? "You" : event.creator.name} renamed <span style='color: var(--card-color)'>#{ event.eventable.title }</span> (was: '#{event.particulars.dig('particulars', 'old_title')})'".html_safe
     end
   end
 
diff --git a/app/helpers/notifications_helper.rb b/app/helpers/notifications_helper.rb
index 5f61f99e9..cbb1774a0 100644
--- a/app/helpers/notifications_helper.rb
+++ b/app/helpers/notifications_helper.rb
@@ -1,9 +1,9 @@
 module NotificationsHelper
   def event_notification_title(event)
     case event_notification_action(event)
-    when "commented" then "RE: " + event.card.title
-    when "assigned" then "Assigned to you: " + event.card.title
-    else event.card.title
+    when "commented" then "RE: " + event.eventable.title
+    when "assigned" then "Assigned to you: " + event.eventable.title
+    else event.eventable.title
     end
   end
 
diff --git a/app/models/card/eventable.rb b/app/models/card/eventable.rb
index 55a0245ea..eb06ead4a 100644
--- a/app/models/card/eventable.rb
+++ b/app/models/card/eventable.rb
@@ -2,7 +2,7 @@ module Card::Eventable
   extend ActiveSupport::Concern
 
   included do
-    has_many :events, dependent: :destroy
+    has_many :events, as: :eventable, dependent: :destroy
 
     before_create { self.last_active_at = Time.current }
 
@@ -10,9 +10,9 @@ module Card::Eventable
     after_save :track_title_change, if: :saved_change_to_title?
   end
 
-  def track_event(action, creator: Current.user, **particulars)
+  def track_event(action, creator: Current.user, collection: self.collection, **particulars)
     if published?
-      find_or_capture_event_summary.events.create! action: action, creator: creator, card: self, particulars: particulars
+      find_or_capture_event_summary.events.create! action:, creator:, collection:, eventable: self, particulars:
     end
   end
 
diff --git a/app/models/event.rb b/app/models/event.rb
index 1fc2fc5b6..9659ace63 100644
--- a/app/models/event.rb
+++ b/app/models/event.rb
@@ -1,12 +1,15 @@
 class Event < ApplicationRecord
   include Notifiable, Particulars
 
+  belongs_to :collection
   belongs_to :creator, class_name: "User"
-  belongs_to :card
+  belongs_to :eventable, polymorphic: true
+  belongs_to :summary, touch: true, class_name: "EventSummary"
 
   scope :chronologically, -> { order created_at: :asc, id: :desc }
 
-  after_create -> { card.touch(:last_active_at) }
+  # TODO: Remove dependency with last_active_at via hook
+  after_create -> { eventable.touch(:last_active_at) }
 
   def action
     super.inquiry
@@ -16,11 +19,12 @@ class Event < ApplicationRecord
     if action.commented?
       comment
     else
-      card
+      eventable
     end
   end
 
+  # TODO: This doesn't belong here anymore
   def initial_assignment?
-    action == "published" && card.assigned_to?(creator)
+    action == "published" && eventable.assigned_to?(creator)
   end
 end
diff --git a/app/models/event_summary.rb b/app/models/event_summary.rb
index 99af2d0e1..241d3cc3c 100644
--- a/app/models/event_summary.rb
+++ b/app/models/event_summary.rb
@@ -1,7 +1,7 @@
 class EventSummary < ApplicationRecord
   include Messageable
 
-  has_many :events, -> { chronologically }, dependent: :delete_all, foreign_key: :summary_id
+  has_many :events, -> { chronologically }, dependent: :delete_all, inverse_of: :summary
 
   # FIXME: Consider persisting the body and compute at write time.
   def body
diff --git a/app/models/notifier/event_notifier.rb b/app/models/notifier/event_notifier.rb
index ea771bc15..e7b11b4d8 100644
--- a/app/models/notifier/event_notifier.rb
+++ b/app/models/notifier/event_notifier.rb
@@ -1,12 +1,12 @@
 class Notifier::EventNotifier < Notifier
-  delegate :card, :creator, to: :source
+  delegate :creator, to: :source
   delegate :watchers_and_subscribers, to: :card
 
   private
     def recipients
       case source.action
       when "assigned"
-        source.assignees.excluding(card.collection.access_only_users)
+        source.assignees.excluding(source.collection.access_only_users)
       when "published"
         watchers_and_subscribers(include_only_watching: true).without(creator, *card.mentionees)
       when "commented"
@@ -15,4 +15,8 @@ class Notifier::EventNotifier < Notifier
         watchers_and_subscribers.without(creator)
       end
     end
+
+    def card
+      source.eventable
+    end
 end
diff --git a/app/views/events/_event.html.erb b/app/views/events/_event.html.erb
index 2d37c5665..4bde70fbb 100644
--- a/app/views/events/_event.html.erb
+++ b/app/views/events/_event.html.erb
@@ -1,4 +1,4 @@
-<% card = event.card %>
+<% card = event.eventable %>
 <% link = event.action == "commented" ? collection_card_path(card.collection, card, anchor: dom_id(event.comment)) : collection_card_path(card.collection, card) %>
 
 <%= link_to link,
diff --git a/app/views/notifications/notification/_event.html.erb b/app/views/notifications/notification/_event.html.erb
index 9a02db061..2dd8d16ee 100644
--- a/app/views/notifications/notification/_event.html.erb
+++ b/app/views/notifications/notification/_event.html.erb
@@ -4,4 +4,4 @@
 <div class="overflow-ellipsis txt-small txt-tight-lines">
   <%= event_notification_body(event) %>
 </div>
-<div class="tray__item-meta overflow-ellipsis translucent"><%= notification.source.card.collection.name %> · <%= local_datetime_tag(notification.created_at, style: :ago) %></div>
+<div class="tray__item-meta overflow-ellipsis translucent"><%= notification.source.collection.name %> · <%= local_datetime_tag(notification.created_at, style: :ago) %></div>
diff --git a/app/views/terminals/_event.html.erb b/app/views/terminals/_event.html.erb
index fd67cd405..b82c37ba6 100644
--- a/app/views/terminals/_event.html.erb
+++ b/app/views/terminals/_event.html.erb
@@ -1,5 +1,5 @@
 <li class="min-width overflow-ellipsis">
-  <%= link_to event_action_sentence(event), collection_card_path(event.card.collection, event.card), 
-      class: "terminal__link", 
+  <%= link_to event_action_sentence(event), collection_card_path(event.collection, event.eventable),
+      class: "terminal__link",
       data: { turbo_frame: "_top" } %>
-</li>
\ No newline at end of file
+</li>
diff --git a/db/schema.rb b/db/schema.rb
index 3a747df7f..ae4f7e3e4 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.1].define(version: 2025_04_23_114737) do
+ActiveRecord::Schema[8.1].define(version: 2025_04_24_051059) do
   create_table "accesses", force: :cascade do |t|
     t.integer "collection_id", null: false
     t.datetime "created_at", null: false
@@ -177,14 +177,17 @@ ActiveRecord::Schema[8.1].define(version: 2025_04_23_114737) do
 
   create_table "events", force: :cascade do |t|
     t.string "action", null: false
-    t.integer "card_id", null: false
+    t.integer "collection_id", null: false
     t.datetime "created_at", null: false
     t.integer "creator_id", null: false
+    t.integer "eventable_id", null: false
+    t.string "eventable_type", null: false
     t.json "particulars", default: {}
     t.integer "summary_id", null: false
     t.datetime "updated_at", null: false
-    t.index ["card_id"], name: "index_events_on_card_id"
+    t.index ["collection_id"], name: "index_events_on_collection_id"
     t.index ["creator_id"], name: "index_events_on_creator_id"
+    t.index ["eventable_type", "eventable_id"], name: "index_events_on_eventable"
     t.index ["summary_id", "action"], name: "index_events_on_summary_id_and_action"
   end
 
@@ -237,7 +240,7 @@ ActiveRecord::Schema[8.1].define(version: 2025_04_23_114737) do
     t.datetime "created_at", null: false
     t.integer "creator_id"
     t.datetime "read_at"
-    t.integer "source_id"
+    t.integer "source_id", null: false
     t.string "source_type", null: false
     t.datetime "updated_at", null: false
     t.integer "user_id", null: false
@@ -335,7 +338,7 @@ ActiveRecord::Schema[8.1].define(version: 2025_04_23_114737) do
   add_foreign_key "closures", "cards"
   add_foreign_key "closures", "users"
   add_foreign_key "collections", "workflows"
-  add_foreign_key "events", "cards"
+  add_foreign_key "events", "collections"
   add_foreign_key "events", "event_summaries", column: "summary_id"
   add_foreign_key "mentions", "users", column: "mentionee_id"
   add_foreign_key "mentions", "users", column: "mentioner_id"
diff --git a/db/schema_cache.yml b/db/schema_cache.yml
index 42cd125c0..918fa9373 100644
--- a/db/schema_cache.yml
+++ b/db/schema_cache.yml
@@ -80,7 +80,7 @@ columns:
     default_function:
     collation:
     comment:
-  - &27 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+  - &28 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
     auto_increment:
     name: user_id
     cast_type: *1
@@ -435,7 +435,7 @@ columns:
     default_function:
     collation:
     comment:
-  - &29 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+  - &30 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
     auto_increment:
     name: title
     cast_type: *7
@@ -489,11 +489,11 @@ columns:
   - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
     auto_increment:
     name: all_access
-    cast_type: &30 !ruby/object:ActiveModel::Type::Boolean
+    cast_type: &31 !ruby/object:ActiveModel::Type::Boolean
       precision:
       scale:
       limit:
-    sql_type_metadata: &31 !ruby/object:ActiveRecord::ConnectionAdapters::SqlTypeMetadata
+    sql_type_metadata: &32 !ruby/object:ActiveRecord::ConnectionAdapters::SqlTypeMetadata
       sql_type: boolean
       type: :boolean
       limit:
@@ -545,9 +545,29 @@ columns:
     default_function:
     collation:
     comment:
-  - *21
+  - *22
   - *5
   - *23
+  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+    auto_increment:
+    name: eventable_id
+    cast_type: *1
+    sql_type_metadata: *2
+    'null': false
+    default:
+    default_function:
+    collation:
+    comment:
+  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+    auto_increment:
+    name: eventable_type
+    cast_type: *7
+    sql_type_metadata: *8
+    'null': false
+    default:
+    default_function:
+    collation:
+    comment:
   - *6
   - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
     auto_increment:
@@ -617,7 +637,7 @@ columns:
     comment:
   filters_tags:
   - *18
-  - &28 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+  - &29 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
     auto_increment:
     name: tag_id
     cast_type: *1
@@ -650,7 +670,7 @@ columns:
     default_function:
     collation:
     comment:
-  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+  - &26 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
     auto_increment:
     name: source_id
     cast_type: *1
@@ -660,7 +680,7 @@ columns:
     default_function:
     collation:
     comment:
-  - &26 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
+  - &27 !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
     auto_increment:
     name: source_type
     cast_type: *7
@@ -719,25 +739,16 @@ columns:
     default_function:
     collation:
     comment:
-  - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
-    auto_increment:
-    name: source_id
-    cast_type: *1
-    sql_type_metadata: *2
-    'null': true
-    default:
-    default_function:
-    collation:
-    comment:
   - *26
-  - *9
   - *27
+  - *9
+  - *28
   pins:
   - *21
   - *5
   - *6
   - *9
-  - *27
+  - *28
   reactions:
   - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
     auto_increment:
@@ -817,24 +828,24 @@ columns:
     default_function:
     collation:
     comment:
-  - *27
+  - *28
   taggings:
   - *21
   - *5
   - *6
-  - *28
+  - *29
   - *9
   tags:
   - *5
   - *6
-  - *29
+  - *30
   - *9
   users:
   - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
     auto_increment:
     name: active
-    cast_type: *30
-    sql_type_metadata: *31
+    cast_type: *31
+    sql_type_metadata: *32
     'null': false
     default: true
     default_function:
@@ -879,12 +890,12 @@ columns:
   - *5
   - *6
   - *9
-  - *27
+  - *28
   - !ruby/object:ActiveRecord::ConnectionAdapters::SQLite3::Column
     auto_increment:
     name: watching
-    cast_type: *30
-    sql_type_metadata: *31
+    cast_type: *31
+    sql_type_metadata: *32
     'null': false
     default: true
     default_function:
@@ -1493,10 +1504,10 @@ indexes:
   events:
   - !ruby/object:ActiveRecord::ConnectionAdapters::IndexDefinition
     table: events
-    name: index_events_on_card_id
+    name: index_events_on_collection_id
     unique: false
     columns:
-    - card_id
+    - collection_id
     lengths: {}
     orders: {}
     opclasses: {}
@@ -1523,6 +1534,23 @@ indexes:
     nulls_not_distinct:
     comment:
     valid: true
+  - !ruby/object:ActiveRecord::ConnectionAdapters::IndexDefinition
+    table: events
+    name: index_events_on_eventable
+    unique: false
+    columns:
+    - eventable_type
+    - eventable_id
+    lengths: {}
+    orders: {}
+    opclasses: {}
+    where:
+    type:
+    using:
+    include:
+    nulls_not_distinct:
+    comment:
+    valid: true
   - !ruby/object:ActiveRecord::ConnectionAdapters::IndexDefinition
     table: events
     name: index_events_on_summary_id_and_action
@@ -1998,4 +2026,4 @@ indexes:
     comment:
     valid: true
   workflows: []
-version: 20250423114737
+version: 20250424051059
diff --git a/test/fixtures/events.yml b/test/fixtures/events.yml
index 61746d7fd..11c8b46e9 100644
--- a/test/fixtures/events.yml
+++ b/test/fixtures/events.yml
@@ -1,13 +1,15 @@
 logo_published:
   creator: david
-  card: logo
+  collection: writebook
+  eventable: logo (Card)
   action: published
   summary: logo_initial_activity
   created_at: <%= 1.week.ago %>
 
 logo_assignment_jz:
   creator: david
-  card: logo
+  collection: writebook
+  eventable: logo (Card)
   action: assigned
   summary: logo_initial_activity
   particulars: <%= { assignee_ids: [ ActiveRecord::FixtureSet.identify(:jz) ] }.to_json %>
@@ -15,7 +17,8 @@ logo_assignment_jz:
 
 logo_assignment_km:
   creator: david
-  card: logo
+  collection: writebook
+  eventable: logo (Card)
   action: assigned
   summary: logo_second_activity
   particulars: <%= { assignee_ids: [ ActiveRecord::FixtureSet.identify(:kevin) ] }.to_json %>
@@ -23,14 +26,16 @@ logo_assignment_km:
 
 layout_published:
   creator: david
-  card: layout
+  collection: writebook
+  eventable: layout (Card)
   action: published
   summary: layout_initial_activity
   created_at: <%= 1.week.ago %>
 
 layout_commented:
   creator: david
-  card: layout
+  collection: writebook
+  eventable: layout (Card)
   action: commented
   summary: layout_initial_activity
   particulars: <%= { comment_id: ActiveRecord::FixtureSet.identify(:layout_overflowing_david) }.to_json %>
@@ -38,7 +43,8 @@ layout_commented:
 
 layout_assignment_jz:
   creator: david
-  card: layout
+  collection: writebook
+  eventable: layout (Card)
   action: assigned
   summary: layout_initial_activity
   particulars: <%= { assignee_ids: [ ActiveRecord::FixtureSet.identify(:jz) ] }.to_json %>
@@ -46,21 +52,24 @@ layout_assignment_jz:
 
 text_published:
   creator: kevin
-  card: text
+  collection: writebook
+  eventable: text (Card)
   action: published
   summary: text_initial_activity
   created_at: <%= 1.week.ago %>
 
 shipping_published:
   creator: kevin
-  card: shipping
+  collection: writebook
+  eventable: shipping (Card)
   action: published
   summary: shipping_initial_activity
   created_at: <%= 1.week.ago %>
 
 shipping_closed:
   creator: kevin
-  card: shipping
+  collection: writebook
+  eventable: shipping (Card)
   action: closed
   summary: shipping_initial_activity
   created_at: <%= 2.days.ago %>
diff --git a/test/models/notifier/event_notifier_test.rb b/test/models/notifier/event_notifier_test.rb
index ca4f0b4b5..97b7f5f68 100644
--- a/test/models/notifier/event_notifier_test.rb
+++ b/test/models/notifier/event_notifier_test.rb
@@ -43,7 +43,7 @@ class Notifier::EventNotifierTest < ActiveSupport::TestCase
   test "links to the card" do
     Notifier.for(events(:logo_published)).notify
 
-    assert_equal cards(:logo), Notification.last.source.card
+    assert_equal cards(:logo), Notification.last.source.eventable
   end
 
   test "assignment events only create a notification for the assignee" do