|The following is based on developer test content cut from Fallout 3 and has not been confirmed by canon sources.|
DLC01TestTrog is a test cell in The Pitt that can only be accessed by using console commands. The console commands to enter this world space are COC TestTrogWorld, as it can only be accessed by console commands it must also be exited this way (i.e. COC DLC01SteelMill01).
The cell features a large empty world space with a singular trog inside. There appears to be no navigation mesh, and so the A.I. character cannot engage the player first.
NOTE: The COC marker for this cell is very high above the ground. This would mean that toggling clipping (tcl) is required to navigate the test cell.