The Small Test Chamber is an Epic keycard in MW4 DMZ for X01, the Season 1 black site. It opens a small room inside the Tech Lab on the Data Center floor, grid F4, right in front of the security checkpoints. Inside are two weapons lockers, a supply crate, a footlocker, a tool chest and a small safe. Below is where the door is, how to get there and what we found inside in our two openings.
- The door is in the X01 Tech Lab on the Data Center floor (F4), in front of the security checkpoints.
- It has a red no-entry sign and a keypad on the wall to its left. You use the keycard at the keypad.
- We brought our keycard in from the stash. On an earlier run one came off an enemy player in the Deep Vault.
- We opened it twice and counted 6 containers each time. The safe held an Ultra valuable worth $25,000 both times, once a Gold Bar and once a Gold Skull.
Where the Small Test Chamber Door Is
The Small Test Chamber is in X01 on the Data Center floor, the floor with the Supply Depot, the Tech Lab, the Bio Lab and the Production Assembly on the tac map. The door is inside the Tech Lab block, in grid F4, in front of the security checkpoints. The Logistics Tunnel runs along the west side of the Tech Lab, and a doorway from the tunnel takes you inside. From there a corridor leads to a reception area with a long counter and red banners, and a little further on is the door, next to a big propaganda poster. It has a red no-entry sign and a keypad on the wall to its left. The door is also on our interactive MW4 DMZ map under the X01 keys layer.
Click to enlarge The Small Test Chamber door with the unlock prompt at the keypad (brightened). 
How to Get the Small Test Chamber Keycard
The Small Test Chamber keycard is an Epic X01 keycard. We brought ours in from the stash in a secure slot, so it was ready to use as soon as we spawned. On an earlier run we took one off an enemy player we killed in the Deep Vault. We have not found one in a container yet. Keycards roll randomly, so treat these as examples and not fixed spots.
To get into X01 you can pick it straight from the FOB deploy menu, as its own location with Free Roam, and you spawn inside the facility. On launch day the way in was the freight elevator in the far north of Hajin. Our X01 entrance guide covers both ways in. The X01 Audit Room keycard is the other X01 room we have opened, and every key on Hajin is in our MW4 DMZ keys guide.
The Route to the Door
- Get to the Logistics Tunnel on the Data Center floor of X01, the long tunnel that runs past the Deep Vault sign and along the west side of the Tech Lab.
- Go through the doorway on the east side of the tunnel into the Tech Lab and follow the corridor to the reception area with the long counter.
- Keep going past the big propaganda poster. The Small Test Chamber is the door with the red no-entry sign. Use the keycard at the keypad on the wall to its left.
What Is Inside the Small Test Chamber
Behind the door is a small, dim room with a whiteboard, a work table with tools and parts on it, folding chairs and a window with a grille. We opened it twice and counted 6 containers each time. There are two green weapons lockers, a small safe under the window, a supply crate, a footlocker (the MINA MS41 crate) and a red tool chest, plus a few loose items on the table, the floor and a shelf.
Containers
The containers decide the loot. Tap one to see what it can drop in our loot data.
Best finds in our runs
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Gold Bar Ultra$25,000 -
Gold Skull Ultra$25,000 -
Gilded Medal of Absolute Loyalty Legendary$15,000 -
Human Trial Records: R-18 Epic$8,000 -
Gilded Maritime Relic Epic$7,000 -
Ceramic Pup of Loyalty Epic$6,000 -
W.M.D. Manifest Epic$5,000 -
2-Plate Helmet Armor Vest Recipe Rare$5,000 -
Manual: PM-40 Anvil $5,000 -
KG-7 Vulcan Rare$4,300 -
M4 Epic$3,300 -
R-4 Bio-Compound Rare$3,000 -
Medical Box Legendary$2,500 -
Medium Scavenger Backpack Epic$2,500 -
Medal of Unquestioning Service Rare$2,500 -
KG-7 Vulcan Uncommon$2,100 -
Encrypted Archive Rare$2,000 -
Alloyed Plating Epic$1,500
Loot per run
- Gold Bar Ultra $25,000 Safe
- Gilded Maritime Relic ×2 Epic $7,000 each Safe
- Ceramic Pup of Loyalty Epic $6,000 Safe
- Medical Box Legendary $2,500 Weapons Locker
- Medium Scavenger Backpack Epic $2,500 Footlocker
- Medal of Unquestioning Service Rare $2,500 Safe
- KG-7 Vulcan Uncommon $2,100 Weapons Locker
- Encrypted Archive Rare $2,000 Loose in the room
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Patriot XMR Rare $1,700 Weapons Locker -
2-Plate Armor Vest Rare $1,000 Supply Crate -
Regional Combat Notes Uncommon $1,000 Weapons Locker -
Weak Night Vision Goggles Uncommon $1,000 Weapons Locker -
High-Tenacity Fibers Rare $500 Weapons Locker -
Nitro Compounds Rare $500 Loose in the room -
Armor Box Rare $300 Weapons Locker -
DDoS Rare $300 Supply Crate -
Disposable Parachute ×3 Rare $300 each Weapons Locker -
Detonators Uncommon $200 Weapons Locker -
Reactive Metals ×2 Uncommon $200 each Weapons Locker, Loose in the room -
Rigid Synthetics Uncommon $200 Weapons Locker -
Ammo Box Uncommon $100 Weapons Locker -
Bandage ×2 Uncommon $100 each Footlocker, Supply Crate -
Portable Radar Uncommon $100 Weapons Locker -
Sedative Inhaler Uncommon $100 Supply Crate -
Semtex Common $50 Supply Crate -
Zip Gun Common $50 Weapons Locker -
Metals ×10 Tool Chest -
Synthetics ×14 Footlocker
Plus 1 item we could not identify.
- Gold Skull Ultra $25,000 Safe
- Gilded Medal of Absolute Loyalty Legendary $15,000 Safe
- Human Trial Records: R-18 Epic $8,000 Safe
- W.M.D. Manifest Epic $5,000 Weapons Locker
- 2-Plate Helmet Armor Vest Recipe Rare $5,000 Footlocker
- Manual: PM-40 Anvil $5,000 Safe
- KG-7 Vulcan Rare $4,300 Weapons Locker
- M4 Epic $3,300 Weapons Locker
- R-4 Bio-Compound Rare $3,000 Footlocker
- Alloyed Plating Epic $1,500 Tool Chest
- Regional Combat Notes ×2 Uncommon $1,000 each Supply Crate
-
HAN 86 Uncommon $800 Weapons Locker -
VEL 46 Uncommon $600 Weapons Locker - Disposable Parachute ×3 Rare $300 each Weapons Locker
-
Biomaterials Uncommon $200 Loose in the room -
Control Unit Uncommon $200 Weapons Locker - Detonators Uncommon $200 Weapons Locker
-
Electronic Sensors Uncommon $200 Tool Chest - Reactive Metals Uncommon $200 Supply Crate
- Sedative Inhaler Uncommon $100 Supply Crate
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Trip Wire Uncommon $100 Weapons Locker -
C4 Common $50 Supply Crate -
Claymore Common $50 Weapons Locker -
Concussion Grenade Common $50 Weapons Locker -
Decoy Grenade Common $50 Loose in the room -
Flash Common $50 Weapons Locker -
Thermite Common $50 Weapons Locker -
Armor Plate Footlocker - Metals ×5 Tool Chest
From 2 openings in our own runs. The best finds cover all of them, and the run buttons show what one opening held. Loot is random, so your room can roll differently, and we add every new run of this key. Values are per item, from the in-game tooltips. The loot value adds up every item with a known value and the cash, so it is a lower bound: crafting resources and items without a value are not in it.
The safe is the best part of the room. Both times it held an Ultra valuable worth $25,000, once a Gold Bar and once a Gold Skull. Next to it lay more valuables, once two Epic Gilded Maritime Relics ($7,000 each), a Ceramic Pup of Loyalty ($6,000) and a Medal of Unquestioning Service, and once a Legendary Gilded Medal of Absolute Loyalty ($15,000), Human Trial Records: R-18 ($8,000) and a weapon manual worth $5,000. The two weapons lockers gave a KG-7 Vulcan both times (Uncommon and Rare), plus a Legendary Medical Box, an Epic M4, a Rare Patriot XMR, a W.M.D. Manifest, Weak Night Vision Goggles, Disposable Parachutes and a handful of field upgrades and 3D printer parts. The footlocker once had an Epic Medium Scavenger Backpack and once a 2-Plate Helmet Armor Vest recipe worth $5,000 with an R-4 Bio-Compound ($3,000). Our backpack filled up fast, so bring space if you want to carry it all out.
Click to enlarge The room behind the door (brightened). 
Click to enlarge The safe with the Ultra Gold Bar in one of our openings (brightened). 
Is the Small Test Chamber Keycard Worth It?
Yes. It is the best room we have opened in X01 so far. Our two openings held at least $65,200 and $80,900 in loot, with an Ultra valuable worth $25,000 in the safe both times and a Legendary Medical Box in one of the weapons lockers. Safes in X01 have their own loot, different from the safes on Hajin, and this one shows why that is worth the trip.
More X01 keycards with their route and loot: the Audit Room, the Executive Room, the Maintenance Room, Deep Vault 301, Deep Vault 106, Deep Vault 406, the Superintendent’s Office and Lt. Chol-Min’s Stash Room.
Frequently Asked Questions
Where is the Small Test Chamber in MW4 DMZ?
In X01, inside the Tech Lab on the Data Center floor, grid F4, in front of the security checkpoints. From the Logistics Tunnel go through the doorway into the Tech Lab, follow the corridor past the reception counter and the big propaganda poster. The door has a red no-entry sign and a keypad on the wall to its left.
Where do you get the Small Test Chamber keycard?
It is an Epic X01 keycard. We brought ours in from the stash in a secure slot, and on an earlier run we took one off an enemy player in the Deep Vault. We have not found one in a container yet, and keycards roll randomly, so keep an eye out anywhere in X01.
What is inside the Small Test Chamber?
We opened it twice and counted 6 containers each time, with a small safe, two weapons lockers, a supply crate, a footlocker and a tool chest, plus a few loose items. The safe held an Ultra valuable worth $25,000 both times, once a Gold Bar and once a Gold Skull, with Epic and Legendary valuables next to it such as a Gilded Medal of Absolute Loyalty ($15,000) and Gilded Maritime Relics ($7,000 each).
Can you use the Small Test Chamber keycard more than once?
No. Keys and keycards in MW4 DMZ are single use and disappear the moment the door unlocks, so loot the whole room in one go.
