Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. §1350

In connection with the Annual Report on Form 10-K of Xcerra Corporation (the “Company”) for the fiscal year ended July 31, 2017 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned hereby certify, pursuant to 18 U.S.C. Section 1350, that, to the best of their knowledge:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/S/    DAVID G. TACELLI

David G. Tacelli

President and Chief Executive Officer

(Principal Executive Officer)

Dated: September 11, 2017

/S/    MARK J. GALLENBERGER

Mark J. Gallenberger

Senior Vice President,

Chief Financial Officer, Chief Operating Officer

and Treasurer

(Principal Financial Officer)

Dated: September 11, 2017