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diff --git a/tests/cpio.scm b/tests/cpio.scm
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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (test-cpio)
+  #:use-module (guix cpio)
+  #:use-module (guix tests)
+  #:use-module ((guix build utils) #:select (which))
+  #:use-module ((guix utils) #:select (call-with-temporary-output-file))
+  #:use-module (ice-9 match)
+  #:use-module (ice-9 popen)
+  #:use-module (rnrs io ports)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-26)
+  #:use-module (srfi srfi-64))
+
+(define %cpio-program
+  (which "cpio"))
+
+
+(test-begin "cpio")
+
+(test-assert "file->cpio-header + write-cpio-header + read-cpio-header"
+  (let* ((file   (search-path %load-path "guix.scm"))
+         (header (file->cpio-header file)))
+    (call-with-values
+        (lambda ()
+          (open-bytevector-output-port))
+      (lambda (port get-bv)
+        (write-cpio-header header port)
+        (let ((port (open-bytevector-input-port (get-bv))))
+          (equal? header (read-cpio-header port)))))))
+
+(unless %cpio-program (test-skip 1))
+(test-assert "bit-identical to GNU cpio's output"
+  (call-with-temporary-output-file
+   (lambda (link _)
+     (delete-file link)
+     (symlink "chbouib" link)
+
+     (let ((files (cons* "/"
+                         (canonicalize-path
+                          (dirname (search-path %load-path "guix.scm")))
+                         link
+                         (map (compose canonicalize-path
+                                       (cut search-path %load-path <>))
+                              '("guix.scm" "guix/build/syscalls.scm"
+                                "guix/packages.scm")))))
+       (call-with-temporary-output-file
+        (lambda (ref-file _)
+          (let ((pipe (open-pipe* OPEN_WRITE %cpio-program "-o" "-O" ref-file
+                                  "-H" "newc" "--null")))
+            (for-each (lambda (file)
+                        (format pipe "~a\0" file))
+                      files)
+            (and (zero? (close-pipe pipe))
+                 (call-with-temporary-output-file
+                  (lambda (file port)
+                    (write-cpio-archive files port)
+                    (close-port port)
+                    (or (file=? ref-file file)
+                        (throw 'cpio-archives-differ files
+                               ref-file file
+                               (stat:size (stat ref-file))
+                               (stat:size (stat file))))))))))))))
+
+(test-end "cpio")
+
+
+(exit (= (test-runner-fail-count (test-runner-current)) 0))