Robert J. Marshall, a federal prisoner proceeding pro se, appeals the district court’s denial of his 28 U.S.C. § 2241 petition for a writ of habeas corpus. Marshall contends that even though he has already been denied post-conviction relief under 28 U.S.C. § 2255, he is entitled to it under the savings clause of § 2255(e). He argues that his current claim — that he is innocent of aggravated identity theft because he did not know that an altered social security number he unlawfully used belonged to an actual person — was foreclosed by applicable circuit precedent dur *937 ing his direct appeal and his initial § 2255 proceedings. 1

We review de novo the availability of habeas relief under § 2241. Dohrmann v. United States, 442 F.3d 1279, 1280 (11th Cir. 2006). Section 2255(e) bars a § 2241 petition if the prisoner has failed to seek or has already been denied relief on a § 2255 motion, as Marshall has, “unless it also appears that the remedy by [§ 2255] motion is inadequate or ineffective to test the legality of his detention.” 28 U.S.C. § 2255(e); see also Antonelli v. Warden, U.S.P. Atlanta, 542 F.3d 1348, 1352 n. 1 (11th Cir. 2008) (“[A] § 2255 motion is the exclusive remedy for a federal prisoner to collaterally attack his conviction and sentence, except in the rare cases where it is inadequate to do so.”). The narrow exception to the § 2255(e) bar on § 2241 petitions is called the savings clause. Gilbert v. United States, 640 F.3d 1293, 1305-06 (11th Cir. 2011) (en banc).

If a petitioner files a § 2255 motion and it is denied, he may not circumvent the restriction on second or successive § 2255 motions simply by filing a petition under § 2241. Antonelli, 542 F.3d at 1351. It is the petitioner’s burden to establish the inadequacy or ineffectiveness of the § 2255 remedy. McGhee v. Hanberry, 604 F.2d 9, 10 (5th Cir. 1979). 2

This Court has endorsed a three-part test that can be used to determine whether § 2255 is inadequate or ineffective to test the legality of a prisoner’s detention under § 2255(e)’s savings clause. See Wofford v. Scott, 177 F.3d 1236, 1244 (11th Cir. 1999). The Wofford test requires a petitioner to show that: (1) his claim is based on a retroactively applicable Supreme Court decision; (2) the holding of that Supreme Court decision establishes that he was convicted of a nonexistent offense; and (3) circuit law squarely foreclosed his claim at the time it otherwise should have been raised during his trial, direct appeal, or first § 2255 motion. 3 Id. The merits of a petitioner’s claim cannot be considered unless he has “open[ed] the portal” to a § 2241 proceeding by showing that the savings clause of § 2255(e) applies. Id. at 1244 n. 3. After he satisfies all three requirements of the Wofford test, he still must establish that he is actually innocent of the crime for which he has been convicted. Id. at 1244 & n. 3.

*938 Marshall contends that he could not have brought his current claim in his direct appeal or in his first § 2255 motion because Eighth Circuit precedent foreclosed it. 4 In March 2008 the Eighth Circuit held that in order to convict a defendant of aggravated identity theft under 18 U.S.C. § 1028A(a)(1) the government was not required to prove that the defendant knew that the “means of identification” he unlawfully transferred, possessed, or used actually belonged to another person. See United States v. Mendoza-Gonzalez, 520 F.3d 912, 915-16 (8th Cir. 2008), vacated, - U.S. -, 129 S.Ct. 2377, 173 L.Ed.2d 1289 (2009). 5 In Flores-Figueroa, the 2009 Supreme Court decision that Marshall relies on, the Court held that to convict a defendant of aggravated identity theft under § 1028A(a)(1) the government does have to show that the defendant knew that the “means of identification” he unlawfully transferred, possessed, or used actually belonged to another person. Flores-Figueroa v. United States, 556 U.S. 646, 647, 129 S.Ct. 1886, 1888, 173 L.Ed.2d 853 (2009). In May 2009 the Supreme Court granted certiorari and vacated the Eighth Circuit’s judgment in Mendozar-Gonzalez, remanding for further consideration in light of its Flores-Figueroa decision. Men doza-Gonzalez v. United States, - U.S. -, 129 S.Ct. 2377, 173 L.Ed.2d 1289 (2009).

Applying the three-part Wofford test, the district court concluded that Marshall’s claim did not meet the requirements of § 2255(e)’s savings clause. The parties agree that Marshall has met the first two requirements of the test, placing at issue only the third one. Until 2008, when the Eighth Circuit issued its Mendozar-Gonza-lez decision, that court’s precedent did not squarely foreclose Marshall’s claim that he did not commit aggravated identity theft because he did not know that the social security number he had unlawfully used belonged to an actual person. Marshall had the opportunity to make that argument in his direct appeal and in his initial § 2255 motion, both of which pre-dated 2008. Because his claim was not foreclosed at the times when he could have asserted it, he cannot satisfy the third Wofford requirement. As a result he has failed to “open the portal,” which is the threshold requirement for entitlement to § 2241 relief. Wofford, 177 F.3d at 1244 & n. 3. The district court did not err by denying Marshall’s § 2241 petition.

AFFIRMED.