diff --git a/test/test_orm_paranoia.rb b/test/test_orm_paranoia.rb
index 75c227d..6a5fb8b 100644
--- a/test/test_orm_paranoia.rb
+++ b/test/test_orm_paranoia.rb
@@ -156,3 +156,191 @@ class OrmParanoiaTest < Minitest::Test
 
     widget.really_destroy!
 
+    assert_equal false, seen
+  end
+
+  def test_soft_deleting_predicate_is_false_for_a_non_paranoid_model
+    seen = nil
+    plain_class = Class.new(Prism::Orm::Model) do
+      table_name :plain_things
+      before_destroy { seen = soft_deleting? }
+    end
+    plain_class.store = @store
+    thing = plain_class.create!(name: 'gizmo')
+
+    thing.destroy
+
+    assert_equal false, seen
+  end
+
+  def test_restore_undoes_a_soft_delete
+    widget = Widget.create!(name: 'gizmo')
+    widget.destroy
+    refute_includes Widget.all.map(&:id), widget.id
+
+    widget.restore
+
+    refute widget.destroyed?
+    refute widget.deleted?
+    assert_includes Widget.all.map(&:id), widget.id
+    assert_nil Widget.find(widget.id).deleted_at
+  end
+
+  def test_restore_on_a_record_that_was_never_deleted_is_a_no_op
+    widget = Widget.create!(name: 'gizmo')
+    widget.restore
+    refute widget.deleted?
+  end
+
+  def test_with_deleted_sees_both_live_and_soft_deleted_records
+    live = Widget.create!(name: 'live')
+    dead = Widget.create!(name: 'dead')
+    dead.destroy
+
+    ids = Widget.with_deleted.map(&:id)
+    assert_includes ids, live.id
+    assert_includes ids, dead.id
+    assert_equal [dead.id], Widget.only_deleted.map(&:id)
+  end
+
+  def test_really_destroy_bang_removes_the_row_for_real
+    widget = Widget.create!(name: 'gizmo')
+    widget.destroy
+    assert_includes Widget.only_deleted.map(&:id), widget.id
+
+    widget.really_destroy!
+
+    assert_nil @store.find('widgets', widget.id)
+    refute_includes Widget.with_deleted.map(&:id), widget.id
+  end
+
+  def test_really_destroy_bang_on_a_non_paranoid_model_behaves_like_plain_destroy
+    thing = PlainThing.create!(name: 'gizmo')
+    thing.really_destroy!
+    assert_raises(Prism::Orm::RecordNotFound) { PlainThing.find(thing.id) }
+  end
+
+  def test_dependent_destroy_cascades_a_soft_delete_to_paranoid_children
+    author = Author.create!(name: 'foksiu')
+    post = Post.create!(title: 'hello', author_id: author.id)
+
+    author.destroy
+
+    refute_nil @store.find('posts', post.id), 'child row must still physically exist'
+    assert_empty Post.all.to_a
+    assert_includes Post.only_deleted.map(&:id), post.id
+  end
+
+  def test_paranoid_destroy_still_respects_optimistic_locking
+    original = LockedWidget.create!(name: 'a')
+    stale_copy = LockedWidget.find(original.id)
+    original.update!(name: 'changed')
+
+    error = assert_raises(Prism::Orm::StaleObjectError) { stale_copy.destroy }
+    assert_equal :destroy, error.attempted_action
+    refute stale_copy.destroyed?
+    refute_nil LockedWidget.find(original.id), 'stale soft-delete must not have stamped the row'
+  end
+
+  def test_paranoid_column_can_be_customized
+    @store.create_table(:archivables, %w[id name archived_at])
+    archivable_class = Class.new(Prism::Orm::Model) do
+      table_name :archivables
+      acts_as_paranoid column: 'archived_at'
+    end
+    archivable_class.store = @store
+
+    record = archivable_class.create!(name: 'a')
+    record.destroy
+
+    assert_equal 'archived_at', archivable_class.paranoid_column
+    assert_empty archivable_class.all.to_a
+    refute_nil @store.find('archivables', record.id)['archived_at']
+  end
+
+  def test_paranoid_setting_is_inherited_by_subclasses
+    subclass = Class.new(Widget) { table_name :widgets }
+    subclass.store = @store
+
+    assert subclass.paranoid?
+    assert_equal 'deleted_at', subclass.paranoid_column
+
+    record = subclass.create!(name: 'a')
+    record.destroy
+    assert_empty subclass.all.to_a
+  end
+
+  def test_plain_restore_does_not_bring_back_dependent_destroyed_children
+    blog = Blog.create!(name: 'main', entries_count: 0)
+    entry = Entry.create!(title: 'first', blog_id: blog.id)
+    blog.destroy
+    assert_includes Entry.only_deleted.map(&:id), entry.id
+
+    blog.restore
+
+    refute blog.deleted?
+    assert_includes Entry.only_deleted.map(&:id), entry.id, 'a non-recursive restore must leave children trashed'
+  end
+
+  def test_recursive_restore_brings_back_paranoid_dependent_children
+    blog = Blog.create!(name: 'main', entries_count: 0)
+    e1 = Entry.create!(title: 'first', blog_id: blog.id)
+    e2 = Entry.create!(title: 'second', blog_id: blog.id)
+    blog.destroy
+    assert_empty Entry.all.to_a
+
+    blog.restore(recursive: true)
+
+    ids = Entry.all.map(&:id)
+    assert_includes ids, e1.id
+    assert_includes ids, e2.id
+    assert_equal 2, blog.reload.entries_count, 'counter_cache must be restored along with each child'
+  end
+
+  def test_recursive_restore_recurses_into_grandchildren
+    @store.create_table(:pages, %w[id title entry_id deleted_at])
+    page_class = Class.new(Prism::Orm::Model) do
+      table_name :pages
+      acts_as_paranoid
+      belongs_to :entry, class_name: 'Entry', foreign_key: 'entry_id'
+    end
+    page_class.store = @store
+    Object.const_set(:Page, page_class)
+    Entry.has_many :pages, class_name: 'Page', foreign_key: 'entry_id', dependent: :destroy
+
+    blog = Blog.create!(name: 'main', entries_count: 0)
+    entry = Entry.create!(title: 'first', blog_id: blog.id)
+    page = Page.create!(title: 'sub', entry_id: entry.id)
+    blog.destroy
+    assert_includes Page.only_deleted.map(&:id), page.id
+
+    blog.restore(recursive: true)
+
+    assert_includes Page.all.map(&:id), page.id
+  ensure
+    Object.send(:remove_const, :Page) if Object.const_defined?(:Page)
+  end
+
+  def test_restore_runs_before_and_after_restore_callbacks_in_order
+    calls = []
+    Widget.before_restore { calls << :before }
+    Widget.after_restore { calls << :after }
+    widget = Widget.create!(name: 'gizmo')
+    widget.destroy
+
+    widget.restore
+
+    assert_equal %i[before after], calls
+  end
+
+  def test_before_restore_abort_leaves_the_record_soft_deleted
+    Widget.before_restore { throw :abort }
+    widget = Widget.create!(name: 'gizmo')
+    widget.destroy
+
+    widget.restore
+
+    assert widget.deleted?
+    assert_includes Widget.only_deleted.map(&:id), widget.id
+  end
+end