OPINION

Defendant Ernst & Young, LLP appeals the district court’s denial of its motion to compel arbitration of state wage and hour claims asserted by its former employee, Michelle Richards. The defendant filed the motion after the Supreme Court’s decision in AT & T Mobility LLC v. Concepcion, — U.S. -, 131 S.Ct. 1740 , 179 L.Ed.2d 742 (2011). The district court determined that Ernst & Young had waived its right to arbitration by failing to assert that right as a defense in an action brought by two other former employees, David Ho and Sarah Fernandez, whose action had been consolidated with that of Ms. Richards. Because Ms. Richards has not established any prejudice as a result of Ernst & Young’s alleged delay in asserting its arbitral rights, we reverse the judgment of the district court.

`Waiver of a contractual right to arbitration is not favored,” and, therefore, “any party arguing waiver of arbitration bears a heavy burden of proof.” Fisher v. A.G. Becker Paribas Inc., 791 F.2d 691, 694 (9th Cir.1986) (quotation marks omitted). Specifically, “[a] party seeking to prove waiver of a right to arbitration must demonstrate: (1) knowledge of an existing right to compel arbitration; (2) acts inconsistent with that existing right; and (3) prejudice to the party opposing arbitration resulting from such inconsistent acts.” Id. “Where, as here, the concern is whether the undisputed facts of defendant’s pretrial participation in the litigation satisfy the standard for waiver, the question of waiver of arbitration is one of law which we review de novo.” Id. at 693.

Ms. Richards argues that she was prejudiced because there was litigation on the merits, and, as a result, some of her claims were dismissed. We cannot accept this argument. One of Ms. Richards’ claims-Ernst & Young’s failure to provide meal and rest breaks-was dismissed without prejudice, which is not a decision on the merits. See Oscar v. Alaska Dep’t of Eduec. & Early Dev., 541 F.3d 978, 981 (9th Cir.2008). The other claim on which the district court ruled-Ms. Richards’s claim for injunctive relief-was resolved by the district court on the basis of standing: Ms. Richards, as a former employee, could not benefit from prospective relief and therefore did not have standing to assert that claim. We previously have observed that “[t]he jurisdictional question of standing precedes, and does not require, analysis of the merits.” Equity Lifestyle Props., Inc. v. Cnty. of San Luis Obispo, 548 F.3d 1184 , 1189 n. 10 ' (9th Cir.2008).

Ms. Richards also maintains that she was prejudiced because Ernst & Young conducted discovery that caused her to incur expenses during the years of litigation prior to the motion to compel. Ms. Richards does not contend, however, that Ernst & Young used discovery “to gain information about the other side’s case that could not have been gained in arbitration.” Saint Agnes Med. Ctr. v. PacifiCare of Cal., 31 Cal.4th 1187, 1204 , 8 Cal.Rptr.3d 517, 530 , 82 P.3d 727, 738 (Cal.2003) (noting that courts have found prejudice in such circumstances). Moreover, in Fisher , we rejected the notion that “self-inflicted” expenses could be evidence of prejudice. 791 F.2d at 698 . Like the plaintiffs in Fisher , Ms. Richards was a “part[y] to an agreement making arbitration of disputes mandatory,” and therefore “[a]ny extra expense incurred as a result of [Ms. Richards’s] deliberate choice of an improper forum, in contravention of their contract, cannot be charged to” Ernst & Young. Id.

Alternatively, Ms. Richards urges that we may rely on the decision of the National Labor Relations Board (“NLRB”) decision in D.R. Horton, 357 N.L.R.B. No. 184, 2012 WL 36274 (Jan. 3, 2012), to affirm the district court’s judgment. We decline to do so. Ms. Richards failed to raise the argument that her arbitration agreement with Ernst & Young was unenforceable under the National Labor Relations Act (“NLRA”) until after the parties had briefed, and the district court had denied, Ernst & Young’s motion to compel. “We apply a ‘general rule’ against entertaining arguments on appeal that were not presented or developed before the district court.” Peterson v. Highland Music, Inc., 140 F.3d 1313, 1321 (9th Cir.1998). We also note that the only court of appeals, and the overwhelming majority of the district courts, to have considered the issue have determined that they should not defer to the NLRB’s decision in D.R. Horton because it conflicts with the explicit pronouncements of the Supreme Court concerning the policies un-dergirding the Federal Arbitration Act (“FAA”), 9 U.S.C. §§ 1-16 . Finally, the Supreme Court recently has reiterated that “courts must rigorously enforce arbitration agreements according to their terms” and that this “holds true for claims that allege a violation of a federal statute, unless the FAA’s mandate has been overridden by a contrary congressional command.” Am. Express v. Italian Colors Rest., — U.S.-, 133 S.Ct. 2304, 2309 , 186 L.Ed.2d 417 (2013) (internal quotation marks omitted). “Congress,” however, “did not expressly provide that it was overriding any provision in the FAA when it enacted the NLRA or the Norris-La-Guardia Act.” Morvant v. P.F. Chang’s China Bistro, Inc., 870 F.Supp.2d 831, 845 (N.D.Cal.2012).

REVERSED.

. The district court's jurisdiction was based on 28 U.S.C. § 1332 . . Our jurisdiction is based on 9 U.S.C. § 16 (a)(1)(B). . See, e.g., Owen v. Bristol Care, Inc., 702 F.3d 1050, 1055 (8th Cir.2013) (''[G]iven the absence of any 'contrary congressional command' from the FLSA that a right to engage in class actions overrides the mandate of the FAA in favor of arbitration, we reject Owen’s invitation to follow the NLRB’s rationale in D.R. Horton....”) (quoting CompuCredit Corp. v. Greenwood, -U.S. -, 132 S.Ct. 665, 669 , 181 L.Ed.2d 586 (2012)); Delock v. Securitas Sec. Servs. USA, Inc., 883 F.Supp.2d 784, 789 (E.D.Ark.2012) ("The Court declines to endorse, however, the Board's application of the Federal Arbitration Act or its reading of the precedent applying that Act. The NLRA, as interpreted in Horton, conflicts with the FAA, as interpreted by the Supreme Court.”); Morvant v. P.F. Chang's China Bistro, Inc., 870 F.Supp.2d 831, 845 (N.D.Cal.2012) (noting that the Supreme Court had "held that courts are required to enforce agreements to arbitrate according to their terms, unless the FAA’s mandate has been overridden by a contrary congressional command,” but concluding that "Congress did not expressly provide that it was overriding any provision in the FAA when it enacted the NLRA or the NorrisLaGuardia Act” (internal quotation marks omitted)); Jasso v. Money Mart Express, Inc., 879 F.Supp.2d 1038, 1049 (N.D.Cal.2012) ("Because Congress did not expressly provide that it was overriding any provision in the FAA, the Court cannot read such a provision into the NLRA and is constrained by [AT & T Mobility LLC v.] Concepcion [, -U.S. -, 131 S.Ct. 1740 , 179 L.Ed.2d 742 (2011),] to enforce the instant agreement according to its terms.”); LaVoice v. UBS Fin. Servs., Inc., No. 11 Civ. 2308(BSJ)(JLC), 2012 WL 124590 , at *6 (S.D.N.Y. Jan. 13, 2012) (holding that "this Court must read AT & T Mobility as standing against any argument that an absolute right to collective action is consistent with the FAA’s 'overarching purpose’ of ‘ensuring] the enforcement of arbitration agreements according to their terms so as to facilitate streamlined proceedings’ ” and that, "[t]o the extent that LaVoice relies on ... the recent decision of the [NLRB] in D.R. Horton, Inc. ..., as authority to support a conflicting reading of AT & T Mobility, this Court declines to follow th[at] decision[]” (quoting AT & T Mobility, 131 S.Ct. at 1748)). But see Brown v. Citicorp Credit Servs., No. 1:12-cv-00062-BLW, 2013 WL 645942 , at *3 (D.Idaho Feb. 21, 2013) (deferring to NLRB’s decision in D.R. Horton under Chevron, U.S.A., Inc. v. Natural Res. Def. Council, Inc., 467 U.S. 837 , 104 S.Ct. 2778 , 81 L.Ed.2d 694 (1984), as "rational and consistent” with the NLRA, but failing to consider countervailing policies or deference with respect to the FAA); Herrington v. Waterstone Mortg. Corp., No. 11-cv-779-bbc, 2012 WL 1242318 , at *6 (W.D.Wis. Mar. 16, 2012) (finding “the Board’s interpretation of the NLRA in D.R. Horton [ ] is reasonably defensible” and, therefore, “applying it ... to invalidate the collective action waiver in the arbitration agreement” (internal quotation marks omitted)). . Because the district court should have compelled arbitration, and because the arbitration agreement between Ernst & Young and Ms. Richards precludes class arbitration, we also vacate the district court's order certifying a class of litigants with Ms. Richards as its representative.