But post Macondo, Uncle Sam made MMR roll the rig back out of the way and close off the well before a flow test could be completed (No longer a requirement).
The investigation did discover that BP's rig supervisors and crew members from Transocean had not carried out a crucial safety test properly, missing an important early warning that the pressure was too high and the well was about to rupture.
When the heavy drilling mud that provides the pressure needed to keep things from coming up the well was removed, first as a test, then as part of a procedure for closing down the well and moving the rig, telltale signs that something was wrong were missed.