| screenshot = Portal Test Chamber 13 Advanced.png
| icon1 = cube dispenser on
| icon2 = cube hazard on
| icon3 = pellet hazard on
| icon4 = pellet catcher on
| icon5 = water hazard
| icon6 = fling enter
| icon7 = fling exit
| icon8 = turret hazard
| icon9 = dirty water
| icon10 = cake
| previous = Portal Test Chamber 16 Advanced
| next = Portal Test Chamber 18 Advanced
}}
This is the fifth advanced chamber of the game. This version is unlocked when the original Test Chamber 17 has been completed. It has the extra challenge of replacing the [[Weighted Companion Cube|Companion Cube]] with a spherical replacement, harder directing of the Pellets into Pellet catchers, as well as an extra [[flinging]] section near the end.
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Test Chamber 17
testchmb_a_13_advanced.bsp
This is the fifth advanced chamber of the game. This version is unlocked when the original Test Chamber 17 has been completed. It has the extra challenge of replacing the Companion Cube with a spherical replacement, harder directing of the Pellets into Pellet catchers, as well as an extra flinging section near the end.
