diff --git a/gnu/packages/libunwind.scm b/gnu/packages/libunwind.scm
index 383033788e..8b9f800711 100644
--- a/gnu/packages/libunwind.scm
+++ b/gnu/packages/libunwind.scm
@@ -3,6 +3,7 @@
 ;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2019 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2022 Efraim Flashner <efraim@flashner.co.il>
+;;; Copyright © 2022 Marius Bakke <marius@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -39,10 +40,10 @@
                "0xj9g6a9q7v7zz6lymf3f6011synibgawi4wi384bywid5kfqsja"))))
     (build-system gnu-build-system)
     (arguments
-     ;; FIXME: As of glibc 2.25, we get 1 out of 34 test failures (2 are
-     ;; expected to fail).
-     ;; Report them upstream.
-     '(#:tests? #f))
+     '(#:make-flags
+       ;; Two tests are failing with newer toolchains:
+       ;; https://github.com/libunwind/libunwind/issues/363
+       '("XFAIL_TESTS=run-coredump-unwind run-coredump-unwind-mdi")))
     (home-page "https://www.nongnu.org/libunwind")
     (synopsis "Determining the call chain of a program")
     (description