During this time, GLaDOS admits to having lied about not monitoring the chamber, and that she will no longer 'enhance the truth.' Upon leaving the chamber, the test subject shoots a portal and goes through, landing on a glass panel and going down a hallway to the elevator. Yet another Cube and Button test, this time the test subject must retrieve two Weighted Storage Cubes, one on a high platform and one in a pit, and put them on two separate buttons. This was to prevent the sudden slowdown in gameplay while also creating a more instructive environment, avoiding a ' Portal Carousel' effect, as stated by Alex Vlachos. Instead of the portals being made automatically, the test subject now decides when and where the portals are created through use of buttons.

When Chell returns to this testing track in a ruined state in Portal 2, there seems to have been some changes made while she was in stasis. This time, the test subject has to wait for automated portals to shoot into the 3 walled off areas, eventually getting the Storage Cube onto the button and moving on to the next Test Chamber. Instead of the Storage cube and Button being right next to each other like in Test Chamber 00, the two are separated by glass walls. The next test chamber is another test meant to teach test subjects how Super Buttons and Storage Cubes work, but this time the test is much more advanced. Chell returns to her relaxation vault, which is in an extremely dilapidated shape from years (possibly decades) of neglect, and the Announcer says very similar things to what GLaDOS said in Portal. In Portal 2, the same chamber is revisited when Wheatley gets Chell back to the testing area. It is also the only test chamber to not involve portals. This test is meant to teach the test subjects the relationship between Super Buttons and Weighted Storage cubes. Once the test subject exits the relaxation chamber, they will enter the test room, which contains an Aperture Science Heavy Duty Super-Colliding Super Button and Storage Cube dispenser. Upon the timer reaching zero, a portal opens leading to Test Chamber 00. After a brief warning (which is cut out by a strange malfunction), GLaDOS counts down the last three seconds on the timer. At the 40-second mark, GLaDOS makes an announcement that the test is about to start. Upon the Test Subject's awakening, the timer above the portal starts counting backwards from one minute. The last chamber of this course however, is connected to the Incinerator Room.Д«eing the first test chamber of this Testing Track, Test Chamber 00 contains both the actual test and the Relaxation Vault. The first chamber of this course is located nearby the Extended Relaxation Center from which Test Subjects are deployed from and put into temporary stasis in the Relaxation Vault. Consisting of 19 test chambers, it was first used by Chell as part of her mandatory testing. GLaDOS' testing track is the testing course featured in Portal, and partially revisited during the course of Portal 2's intro in the single-player campaign.

Portal test chamber 14