this spec is just refusing to work on jenkins

app/models/user.rb

@@ -285,8 +285,9 @@ class User < ActiveRecord::Base
   def update_last_seen!(now=nil)
     now ||= Time.zone.now
     now_date = now.to_date
+
     # Only update last seen once every minute
-    redis_key = "user:#{self.id}:#{now_date.to_s}"
+    redis_key = "user:#{self.id}:last_seen"
     if $redis.setnx(redis_key, "1")
       $redis.expire(redis_key, SiteSetting.active_user_rate_limit_secs)
 

spec/models/user_spec.rb

@@ -592,6 +592,7 @@ describe User do
 
     before do
       SiteSetting.stubs(:active_user_rate_limit_secs).returns(0)
+      SiteSetting.stubs(:previous_visit_timeout_hours).returns(1)
     end
 
     it "should act correctly" do
@@ -601,6 +602,11 @@ describe User do
       user.update_last_seen!(first_visit_date)
       user.previous_visit_at.should be_nil
 
+      # updated same time
+      user.update_last_seen!(first_visit_date)
+      user.reload
+      user.previous_visit_at.should be_nil
+
       # second visit
       user.update_last_seen!(second_visit_date)
       user.reload
@@ -610,7 +616,6 @@ describe User do
       user.update_last_seen!(third_visit_date)
       user.reload
       user.previous_visit_at.should be_within_one_second_of(second_visit_date)
-
     end
 
   end