portal 2 where is test chamber 03?

Question

I went straight from test chamber 02 to test chamber 04 but how did I skip test chamber 3?

Answer 1

It's right after Test Chamber 01 and before Test Chamber 04. Use portals!

Comments

but I went test chamber 1->test chamber 2->test chamber 4 never saw test chamber 3??

Answer 2

Watch this video.

http://www.metacafe.com/watch/6280979/portal_2_guide_chapter_6_test_chamber_03/