What is the test for admitting rebuttal evidence?

"The decision to admit rebuttal evidence rests largely within the discretion of the trial court and will not be disturbed on appeal in the absence of demonstrated abuse of that discretion." (People v. Young (2005) 34 Cal.4th 1149, 1199 (Young).) The erroneous admission of such evidence is reviewed to determine if there is a reasonable probability the jury would have reached a more favorable outcome in the absence of the error. (People v. Crew (2003) 31 Cal.4th 822, 854.)