*112MEMORANDUM**
Silvestre Esparza-Serrano appeals his conviction for distribution of methamphetamine, in violation of 21 U.S.C. § 841(a)(1). Serrano was convicted and sentenced after he entered a plea of guilty. He now seeks to withdraw his guilty plea on the ground that his counsel at the time he entered his guilty plea was operating under a conflict of interest, that he subsequently alerted the district court to this conflict, but that the district court failed to fulfill its duty to inquire into the conflict. We have jurisdiction pursuant to 28 U.S.C. § 1291. Serrano is not entitled to the automatic reversal of his conviction that he seeks, but he is entitled to a remand so that the district court can conduct an appropriate inquiry into the alleged conflict of interest and, in light of that inquiry, decide whether he should be allowed to withdraw his guilty plea. Accordingly, we remand.
I. BACKGROUND
In April 2000, Serrano entered a plea of guilty to one count of distribution of methampetamine. At the time he entered his plea, he was represented by retained counsel, Lawrence Merryman. As recited in the plea agreeement, Serrano faced a statutory mandatory minimum of ten years imprisonment and a statutory maximum of life imprisonment. In terms of the sentencing guidelines, the plea agreement provided that Serrano’s base offense level would be 36, but that if he cooperated with the government, at a minimum the government would recommend a two or three-level reduction in his offense level for acceptance of responsibility and, if warranted, would also move for a downward departure for substantial assistance.
Ten months later, on February 2, 2001, Serrano sent a letter to the district court claiming that he had neither seen nor heard from Merryman since he entered his guilty plea in April 2000. Serrano claimed that Merryman had “abandoned” him, forcing him to ask the district court directly that he be “sentenced forthwith so that I can have somewhat of finality to this predicament that I have created for the system and for myself.” Serrano followed up this letter with a petition, dated March 20, 2001, asking the district court to relieve Merryman and appoint for him new counsel. In his petition, Serrano claimed that he and Merryman had a “conflict of interest and strategy along with other factors detrimental to [Serrano’s] defense.” Serrano also claimed that: “Mr. Merryman never show any interest on the case, so needless to say that is a conflict between attorney and client.”
On April 2, 2001, the parties appeared before the district court for sentencing. When asked by the court about Serrano’s petition for new counsel, Merryman responded:
I have just talked to the defendant with reference to his motion to have me relieved as counsel. And I believe from those discussions, I believe it will be necessary to have me withdraw as counsel.
Essentially, I believe asking to withdraw his plea — or at least, he’s claiming that I misinformed him as to the time that he would have to serve, and that he didn’t — that he signed the plea agreement based upon that.
And that’s not my recollection of the circumstances, but I think between that and some other difficulties, including the length of time that this matter has been *113pending, I think it would be better if I did withdraw.
There has been difficulties right along between us, and I think it’s now gone to the point where he’s lost trust in me. And I don’s think I can represent him adequately any further.
Serrano told the court:
What I do not agree with is that the gentleman changed the sentence that I was told I was going to get. So I don’t feel comfortable with him.
And on top of that, for a whole year he abandoned me. He never told me that I was supposed to come to court or anything like that. He never gave me any documents. I don’t have any papers from the Court.
And that is the reason.
Without any further inquiry into the alleged conflict of interest or its possible effect on prior proceedings, the district court ordered that new counsel be appointed and postponed sentencing until May 14, 2001.
On April 15, 2001, Serrano sent a letter to the district court, stating:
I would first like to thank you for appointing new counsel to represent me. The counsel previous to (Mr. M[e]rryman, Esq.) did not consult with me and in effect goaded me, under duress to state matters and sign declarations that stated that I undertook acts, which I had not. He was hired by my co-defendant, and therefore I suspect Mr. M[e]rryman did not have my best interests at heart: I guess it is for the foresaid reasons and the Courts understanding of them that you invalidated my guilty plea to the Court.
My purpose in writing this letter to you is to address and bring to the Courts attention, a declaration1 that I signed at the urging of Mr. M[e]rryman, that stated facts that I had not undertaken. I signed said declaration under duress. This declaration was signed on or about May 2000. I ask that the Court strike said declaration from the record.
On May 1, 2001, Serrano sent a second letter to the district court, asking if the first letter had been received and attaching another copy. On May 8, 2001, the district court ordered both letters to be filed and served.
On May 14, 2001, the parties again appeared for sentencing. Serrano’s new counsel, Hector Perez, told the district court that the sentencing might need to be postponed because “[t]here is a letter that came in within the last week that needs to be clarified before sentencing proceeds, Your Honor. And I’m hopeful that I can clarify it with my client if I spend time reviewing some matters with him.” The district court responded, “[sjince I’m not aware of what letter that is, can you just give me an indication as to how much time you think you need to resolve this?” Perez asked for a continuance until June 11, 2001, explaining “The issue is in the letter. Mr. Esparza indicates that the prior attorney was hired by the codefendant, and I want to address that matter, Your Honor. And I just got this letter late last week, Your Honor.” The district court granted the continuance.
On July 9, 2001, Serrano was sentenced. After an offense-level reduction for acceptance of responsibility and a substantial assistance departure, inter alia, the district court determined that Serrano’s of*114fense level was 29, his criminal history category was IV, and his guidelines sentencing range was 121-151 months. The district court sentenced Serrano to 121 months imprisonment. Serrano appeals his conviction.
II. DISCUSSION
On appeal, Serrano contends that he was deprived of his right to conflict-free representation at the time he entered his guilty plea, that the district court failed to inquire into the nature of Merrymaris conflict, and, accordingly, he should be allowed to withdraw his guilty plea.
A trial court has a duty to inquire into a potential conflict of interest when it “knows or reasonably should know that a particular conflict [of interest] exists.” Cuyler v. Sullivan, 446 U.S. 335, 347, 100 S.Ct. 1708, 64 L.Ed.2d 333 (1980); see also Garcia v. Bunnell, 33 F.3d 1193, 1999 (9th Cir.1994), cert. denied, 514 U.S. 1024, 115 S.Ct. 1374, 131 L.Ed.2d 229 (1995). The district court here either knew or reasonably should have known of Merryman’s potential conflict of interest because of Serrano’s written communications to the district court in the spring of 2001, Merrymaris and Serrano’s in-court statements when Merryman was removed as counsel, and Serrano’s new attorney’s request for a continuance to investigate any possible conflict. Having been put on notice, the district court had a duty to inquire into Merrymaris potential conflict of interest. The record establishes that it failed to fulfill this duty. At the April 2, 2001 hearing, the district court removed Merryman as counsel without ever addressing the alleged conflict of interest or or what its impact might have been on the plea proceedings. On May 14, 2001, it postponed sentencing to give Serrano’s new attorney, Perez, time to consider the issues raised by Serrano’s April 15, 2001 letter, which Perez described as a conflict issue. When next in court, for sentencing on July 9, 2001, the only conversation the court had with Serrano’s new attorney was to ask him if there was anything else he wished to raise. After receiving a negative answer, the court proceeded to sentence Serrano. The government argues that the district court met its obligations by giving new counsel time to raise the conflict issue and then, after new counsel did not pursue it, proceeding. However, it is the trial court’s duty to inquire that is at issue, and its actions do not appear to have satisfied this duty.
The district court’s failure to inquire into Merrymaris potential conflict of interest, however, does not entitle Serrano to the automatic reversal of his conviction. See Mickens v. Taylor, 535 U.S. 162, 168, 122 S.Ct. 1237, 152 L.Ed.2d 291 (2002) (explaining Holloway v. Arkansas, 435 U.S. 475, 98 S.Ct. 1173, 55 L.Ed.2d 426 (1978)). That extraordinary relief is reserved for cases where defense counsel is improperly required, after a timely objection, to represent co-defendants.2 Id. As there is no allegation that Merryman was improperly forced to represent co-defendants over a timely objection, Serrano is not entitled to automatic reversal.
As the district court’s failure to inquire into the Merrymaris alleged conflict of interest does not entitle Serrano to automatic reversal, the next question is whether Merryman did, in fact, have a conflict of *115interest and, if so, the nature of that conflict. The record as it stands does not permit the resolution of this issue on appeal. Accordingly, we remand3 the case to the district court for it to determine whether Merryman had a conflict of interest and, if so, the nature of his conflict. If the district court concludes that Merryman had a conflict, it can then proceed to the question of whether, as a result of that conflict, Serrano was deprived of the effective assistance of counsel at the time he entered his guilty plea.
In making this decision, the district court will have to choose between two possible standards for evaluating ineffective assistance of counsel claims based on conflicts of interest. Compare Strickland v. Washington, 466 U.S. 668, 694, 104 S.Ct. 2052, 80 L.Ed.2d 674 (1984) (general rule is that a defendant bringing an ineffective assistance of counsel claim must demonstrate “a reasonable probability that, but for counsel’s unprofessional errors, the result of the proceeding would have been different”) with Cuyler, 446 U.S. at 348-49 (in an exception to Strickland, a defendant bringing an ineffective assistance claim based on a joint representation conflict of interest must only demonstrate that an “actual conflict of interest adversely affected his lawyer’s performance”). Historically, courts, particularly this one, have applied the Cuyler test to conflicts other than joint representation. See, e.g., Summerlin v. Stewart, 267 F.3d 926, 935-941 (9th Cir.2001) (defense counsel romantically involved with the prosecutor), opinion withdrawn by 281 F.3d 836 (9th Cir.), reh’g en banc granted, 310 F.3d 1221 (9th Cir.2002); Garcia, 33 F.3d at 1194-1195, 1198 n. 4 (9th Cir.1994) (defense counsel had plan to work for prosecutor’s office at the conclusion of defendant’s trial), cert. denied, 514 U.S. 1024, 115 S.Ct. 1374, 131 L.Ed.2d 229 (1995); United States v. Hearst, 638 F.2d 1190, 1193 (9th Cir.1980) (defense counsel had book contract to write about defendant’s case), cert. denied, 451 U.S. 938, 101 S.Ct. 2018, 68 L.Ed.2d 325 (1981); see also Riggs v. United States, 209 F.3d 828, 831 n. 1 (6th Cir.) (Cuyler applies to all conflict of interest claims), cert. denied, 531 U.S. 884, 121 S.Ct. 200, 148 L.Ed.2d 140 (2000); United States v. Sayan, 968 F.2d 55, 64-65 (D.C.Cir.1992) (defense counsel failed to request continuance for fear of antagonizing the trial judge); United States v. Michaud, 925 F.2d 37, 40-42 (1st Cir.1991) (defense counsel was teaching classes to IRS agents in case where government witness was IRS agent).
The Supreme Court has recently questioned the broad application of Cuyler, opining in dicta in Mickens that “[i]t must be said, however, that the language of Sullivan [Cuyler] itself does not clearly establish, or indeed even support, such expansive application,” Mickens, 122 S.Ct. at 1245, but it did not overrule any of the decisions applying Cuyler to conflicts other than joint representation. Since Mickens, some courts, including the Ninth Circuit, have continued to apply Cuyler to other types of conflicts. See, e.g, Campbell v. Rice, 302 F.3d 892, 896-97 (9th Cir.2002) (in § 2254 ease, applying Cuyler test where defense counsel and defendant were simultaneously being prosecuted by the same prosecutor’s office); see also United States v. Blount, 291 F.3d 201, 212 (2d Cir.2002) (on direct appeal, applying Cuyler test where government witness has been represented in an unrelated proceeding by another member of defense counsel’s law firm), cert. denied sub nom. Streater v. United States, 537 U.S. 1141, 123 S.Ct. 938, 154 L.Ed.2d 838 (2003); *116Moss v. United States, 323 F.3d 445, 462-63 (6th Cir.2003) (in § 2255 case, applying Cuyler test where defense counsel had represented a co-defendant in an earlier stage of the same case, which the court considered “outside of the traditional class of successive representation cases”), cert. denied, — U.S. —, 124 S.Ct. 303, 157 L.Ed.2d 144 (2003); United States v. Young, 315 F.3d 911, 914 n. 5 (8th Cir.) (Cuyler applies to alleged conflicts involving multiple or serial representation while Strickland applies to all other types of conflicts), cert. denied, — U.S. —, 123 S.Ct. 2108, 155 L.Ed.2d 1081 (2003). But see, e.g., Smith v. Hofbauer, 312 F.3d 809 (6th Cir.2002) (in § 2254 case, state court’s failure to apply Cuyler test to simultaneous prosecution conflict was not contrary to “clearly established Federal law, as determined by the Supreme Court”) (Oberdorfer, J., concurring in part and dissenting in part). Without knowing whether Merryman had a conflict of interest, or the nature of that conflict, we are not in a position to decide whether the Cuyler or Strickland analysis should apply-
Accordingly, we remand the district court to allow it to conduct an appropriate inquiry into the alleged conflict of interest and, if it finds there was a conflict, to decide, applying either the Cuyler or Strickland analysis, whether Serrano was denied effective assistance of counsel and should be permitted to withdraw his guilty plea.
REMANDED.
This disposition is not appropriate for publication and may not be cited to or by the courts of this circuit except as provided by Ninth Circuit Rule 36-3.
. It is not clear from the record whether this "declaration” is the plea agreement or some other unidentified document.
. Prior to the Supreme Court’s decision in Mickens, the Ninth Circuit had held that if a court was on notice of a potential conflict, and failed to conduct the necessary inquiry into the alleged conflict, the defendant was entitled to the automatic reversal of his conviction. See Campbell v. Rice, 265 F.3d 878, 884, 889-90 (2001), withdrawn and superceded by 302 F.3d 892 (2002).
. We see no reason to further delay an assessment of the alleged conflict of interest by deferring the matter to the stayed § 2255 motion.