diff -r eedb2586dea4 -r f8873b391f3d spec/ezmlm/list_spec.rb
--- a/spec/ezmlm/list_spec.rb	Tue May 16 22:28:21 2017 -0700
+++ b/spec/ezmlm/list_spec.rb	Wed May 24 15:42:39 2017 -0700
@@ -236,6 +236,10 @@
 		expect( list.digest_count ).to eq( 10 )
 	end
 
+	it 'knows the date of the most recent posting' do
+		expect( list.last_activity ).to be_a( Time )
+	end
+
 	it 'can set a new digest message count' do
 		list.digest_count = 25
 		expect( list.digest_count ).to eq( 25 )