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diff --git a/tests/gpgscm/tests.scm b/tests/gpgscm/tests.scm
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+++ b/tests/gpgscm/tests.scm
@@ -0,0 +1,886 @@
+;; Common definitions for writing tests.
+;;
+;; Copyright (C) 2016 g10 Code GmbH
+;;
+;; This file is part of GnuPG.
+;;
+;; GnuPG 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.
+;;
+;; GnuPG 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 this program; if not, see <http://www.gnu.org/licenses/>.
+
+;; Reporting.
+(define (echo . msg)
+  (for-each (lambda (x) (display x) (display " ")) msg)
+  (newline))
+
+(define (info . msg)
+  (apply echo msg)
+  (flush-stdio))
+
+(define (log . msg)
+  (if (> (*verbose*) 0)
+      (apply info msg)))
+
+(define (fail . msg)
+  (apply info msg)
+  (exit 1))
+
+(define (skip . msg)
+  (apply info msg)
+  (exit 77))
+
+(define (make-counter)
+  (let ((c 0))
+    (lambda ()
+      (let ((r c))
+	(set! c (+ 1 c))
+	r))))
+
+(define *progress-nesting* 0)
+
+(define (call-with-progress msg what)
+  (set! *progress-nesting* (+ 1 *progress-nesting*))
+  (if (= 1 *progress-nesting*)
+      (begin
+	(info msg)
+	(display "    > ")
+	(flush-stdio)
+	(what (lambda (item)
+	      (display item)
+	      (display " ")
+	      (flush-stdio)))
+	(info "< "))
+      (begin
+	(what (lambda (item) (display ".") (flush-stdio)))
+	(display " ")
+	(flush-stdio)))
+  (set! *progress-nesting* (- *progress-nesting* 1)))
+
+(define (for-each-p msg proc lst . lsts)
+  (apply for-each-p' `(,msg ,proc ,(lambda (x . xs) x) ,lst ,@lsts)))
+
+(define (for-each-p' msg proc fmt lst . lsts)
+  (call-with-progress
+   msg
+   (lambda (progress)
+     (apply for-each
+	    `(,(lambda args
+		 (progress (apply fmt args))
+		 (apply proc args))
+	      ,lst ,@lsts)))))
+
+;; Process management.
+(define CLOSED_FD -1)
+(define (call-with-fds what infd outfd errfd)
+  (wait-process (stringify what) (spawn-process-fd what infd outfd errfd) #t))
+(define (call what)
+  (call-with-fds what
+		 CLOSED_FD
+		 (if (< (*verbose*) 0) STDOUT_FILENO CLOSED_FD)
+		 (if (< (*verbose*) 0) STDERR_FILENO CLOSED_FD)))
+
+;; Accessor functions for the results of 'spawn-process'.
+(define :stdin car)
+(define :stdout cadr)
+(define :stderr caddr)
+(define :pid cadddr)
+
+(define (call-with-io what in)
+  (let ((h (spawn-process what 0)))
+    (es-write (:stdin h) in)
+    (es-fclose (:stdin h))
+    (let* ((out (es-read-all (:stdout h)))
+	   (err (es-read-all (:stderr h)))
+	   (result (wait-process (car what) (:pid h) #t)))
+      (es-fclose (:stdout h))
+      (es-fclose (:stderr h))
+      (if (> (*verbose*) 2)
+	  (info "Child" (:pid h) "returned:"
+		`((command ,(stringify what))
+		  (status ,result)
+		  (stdout ,out)
+		  (stderr ,err))))
+      (list result out err))))
+
+;; Accessor function for the results of 'call-with-io'.  ':stdout' and
+;; ':stderr' can also be used.
+(define :retcode car)
+
+(define (call-check what)
+  (let ((result (call-with-io what "")))
+    (if (= 0 (:retcode result))
+	(:stdout result)
+	(throw (string-append (stringify what) " failed")
+	       (:stderr result)))))
+
+(define (call-popen command input-string)
+  (let ((result (call-with-io command input-string)))
+    (if (= 0 (:retcode result))
+	(:stdout result)
+	(throw (:stderr result)))))
+
+;;
+;; estream helpers.
+;;
+
+(define (es-read-all stream)
+  (let loop
+      ((acc ""))
+    (if (es-feof stream)
+	acc
+	(loop (string-append acc (es-read stream 4096))))))
+
+;;
+;; File management.
+;;
+(define (file-exists? name)
+  (call-with-input-file name (lambda (port) #t)))
+
+(define (file=? a b)
+  (file-equal a b #t))
+
+(define (text-file=? a b)
+  (file-equal a b #f))
+
+(define (file-copy from to)
+  (catch '() (unlink to))
+  (letfd ((source (open from (logior O_RDONLY O_BINARY)))
+	  (sink (open to (logior O_WRONLY O_CREAT O_BINARY) #o600)))
+    (splice source sink)))
+
+(define (text-file-copy from to)
+  (catch '() (unlink to))
+  (letfd ((source (open from O_RDONLY))
+	  (sink (open to (logior O_WRONLY O_CREAT) #o600)))
+    (splice source sink)))
+
+(define (path-join . components)
+  (let loop ((acc #f) (rest (filter (lambda (s)
+				      (not (string=? "" s))) components)))
+    (if (null? rest)
+	acc
+	(loop (if (string? acc)
+		  (string-append acc "/" (car rest))
+		  (car rest))
+	      (cdr rest)))))
+(assert (string=? (path-join "foo" "bar" "baz") "foo/bar/baz"))
+(assert (string=? (path-join "" "bar" "baz") "bar/baz"))
+
+;; Is PATH an absolute path?
+(define (absolute-path? path)
+  (or (char=? #\/ (string-ref path 0))
+      (and *win32* (char=? #\\ (string-ref path 0)))
+      (and *win32*
+	   (char-alphabetic? (string-ref path 0))
+	   (char=? #\: (string-ref path 1))
+	   (or (char=? #\/ (string-ref path 2))
+	       (char=? #\\ (string-ref path 2))))))
+
+;; Make PATH absolute.
+(define (canonical-path path)
+  (if (absolute-path? path) path (path-join (getcwd) path)))
+
+(define (in-srcdir . names)
+  (canonical-path (apply path-join (cons (getenv "abs_top_srcdir") names))))
+
+;; Split a list of paths.
+(define (pathsep-split s)
+  (string-split s *pathsep*))
+
+;; Join a list of paths.
+(define (pathsep-join paths)
+  (foldr (lambda (a b) (string-append a (string *pathsep*) b))
+	 (car paths)
+	 (cdr paths)))
+
+;; Try to find NAME in PATHS.  Returns the full path name on success,
+;; or raises an error.
+(define (path-expand name paths)
+  (let loop ((path paths))
+    (if (null? path)
+	(throw "Could not find" name "in" paths)
+	(let* ((qualified-name (path-join (car path) name))
+	       (file-exists (call-with-input-file qualified-name
+			      (lambda (x) #t))))
+	  (if file-exists
+	      qualified-name
+	      (loop (cdr path)))))))
+
+;; Expand NAME using the gpgscm load path.  Use like this:
+;;   (load (with-path "library.scm"))
+(define (with-path name)
+  (catch name
+	 (path-expand name (pathsep-split (getenv "GPGSCM_PATH")))))
+
+(define (basename path)
+  (let ((i (string-index path #\/)))
+    (if (equal? i #f)
+	path
+	(basename (substring path (+ 1 i) (string-length path))))))
+
+(define (basename-suffix path suffix)
+  (basename
+   (if (string-suffix? path suffix)
+       (substring path 0 (- (string-length path) (string-length suffix)))
+       path)))
+
+(define (dirname path)
+  (let ((i (string-rindex path #\/)))
+    (if i (substring path 0 i) ".")))
+(assert (string=? "foo/bar" (dirname "foo/bar/baz")))
+
+;; Helper for (pipe).
+(define :read-end car)
+(define :write-end cadr)
+
+;; let-like macro that manages file descriptors.
+;;
+;; (letfd <bindings> <body>)
+;;
+;; Bind all variables given in <bindings> and initialize each of them
+;; to the given initial value, and close them after evaluating <body>.
+(define-macro (letfd bindings . body)
+  (let bind ((bindings' bindings))
+    (if (null? bindings')
+	`(begin ,@body)
+	(let* ((binding (car bindings'))
+	       (name (car binding))
+	       (initializer (cadr binding)))
+	  `(let ((,name ,initializer))
+	     (finally (close ,name)
+		      ,(bind (cdr bindings'))))))))
+
+(define-macro (with-working-directory new-directory . expressions)
+  (let ((new-dir (gensym))
+	(old-dir (gensym)))
+    `(let* ((,new-dir ,new-directory)
+	    (,old-dir (getcwd)))
+       (dynamic-wind
+	   (lambda () (if ,new-dir (chdir ,new-dir)))
+	   (lambda () ,@expressions)
+	   (lambda () (chdir ,old-dir))))))
+
+;; Make a temporary directory.  If arguments are given, they are
+;; joined using path-join, and must end in a component ending in
+;; "XXXXXX".  If no arguments are given, a suitable location and
+;; generic name is used.  Returns an absolute path.
+(define (mkdtemp . components)
+  (canonical-path (_mkdtemp (if (null? components)
+				(path-join
+				 (get-temp-path)
+				 (string-append "gpgscm-" (get-isotime) "-"
+						(basename-suffix *scriptname* ".scm")
+						"-XXXXXX"))
+				(apply path-join components)))))
+
+;; Make a temporary directory and remove it at interpreter shutdown.
+;; Note that there are macros that limit the lifetime of temporary
+;; directories and files to a lexical scope.  Use those if possible.
+;; Otherwise this works like mkdtemp.
+(define (mkdtemp-autoremove . components)
+  (let ((dir (apply mkdtemp components)))
+    (atexit (lambda () (unlink-recursively dir)))
+    dir))
+
+(define-macro (with-temporary-working-directory . expressions)
+  (let ((tmp-sym (gensym)))
+    `(let* ((,tmp-sym (mkdtemp)))
+       (finally (unlink-recursively ,tmp-sym)
+		(with-working-directory ,tmp-sym
+					,@expressions)))))
+
+(define (make-temporary-file . args)
+  (canonical-path (path-join
+		   (mkdtemp)
+		   (if (null? args) "a" (car args)))))
+
+(define (remove-temporary-file filename)
+  (catch '()
+    (unlink filename))
+  (let ((dirname (substring filename 0 (string-rindex filename #\/))))
+    (catch (echo "removing temporary directory" dirname "failed")
+      (rmdir dirname))))
+
+;; let-like macro that manages temporary files.
+;;
+;; (lettmp <bindings> <body>)
+;;
+;; Bind all variables given in <bindings>, initialize each of them to
+;; a string representing an unique path in the filesystem, and delete
+;; them after evaluating <body>.
+(define-macro (lettmp bindings . body)
+  (let bind ((bindings' bindings))
+    (if (null? bindings')
+	`(begin ,@body)
+	(let ((name (car bindings'))
+	      (rest (cdr bindings')))
+	  `(let ((,name (make-temporary-file ,(symbol->string name))))
+	     (finally (remove-temporary-file ,name)
+		      ,(bind rest)))))))
+
+(define (check-execution source transformer)
+  (lettmp (sink)
+	  (transformer source sink)))
+
+(define (check-identity source transformer)
+  (lettmp (sink)
+	  (transformer source sink)
+	  (if (not (file=? source sink))
+	      (fail "mismatch"))))
+
+;;
+;; Monadic pipe support.
+;;
+
+(define pipeM
+  (package
+   (define (new procs source sink producer)
+     (package
+      (define (dump)
+	(write (list procs source sink producer))
+	(newline))
+      (define (add-proc command pid)
+	(new (cons (list command pid) procs) source sink producer))
+      (define (commands)
+	(map car procs))
+      (define (pids)
+	(map cadr procs))
+      (define (set-source source')
+	(new procs source' sink producer))
+      (define (set-sink sink')
+	(new procs source sink' producer))
+      (define (set-producer producer')
+	(if producer
+	    (throw "producer already set"))
+	(new procs source sink producer'))))))
+
+
+(define (pipe:do . commands)
+  (let loop ((M (pipeM::new '() CLOSED_FD CLOSED_FD #f)) (cmds commands))
+    (if (null? cmds)
+	(begin
+	  (if M::producer (M::producer))
+	  (if (not (null? M::procs))
+	      (let* ((retcodes (wait-processes (map stringify (M::commands))
+					       (M::pids) #t))
+		     (results (map (lambda (p r) (append p (list r)))
+				   M::procs retcodes))
+		     (failed (filter (lambda (x) (not (= 0 (caddr x))))
+				     results)))
+		(if (not (null? failed))
+		    (throw failed))))) ; xxx nicer reporting
+	(if (and (= 2 (length cmds)) (number? (cadr cmds)))
+	    ;; hack: if it's an fd, use it as sink
+	    (let ((M' ((car cmds) (M::set-sink (cadr cmds)))))
+	      (if (> M::source 2) (close M::source))
+	      (if (> (cadr cmds) 2) (close (cadr cmds)))
+	      (loop M' '()))
+	    (let ((M' ((car cmds) M)))
+	      (if (> M::source 2) (close M::source))
+	      (loop M' (cdr cmds)))))))
+
+(define (pipe:open pathname flags)
+  (lambda (M)
+    (M::set-source (open pathname flags))))
+
+(define (pipe:defer producer)
+  (lambda (M)
+    (let* ((p (outbound-pipe))
+	   (M' (M::set-source (:read-end p))))
+      (M'::set-producer (lambda ()
+			  (producer (:write-end p))
+			  (close (:write-end p)))))))
+(define (pipe:echo data)
+ (pipe:defer (lambda (sink) (display data (fdopen sink "wb")))))
+
+(define (pipe:spawn command)
+  (lambda (M)
+    (define (do-spawn M new-source)
+      (let ((pid (spawn-process-fd command M::source M::sink
+				   (if (> (*verbose*) 0)
+				       STDERR_FILENO CLOSED_FD)))
+	    (M' (M::set-source new-source)))
+	(M'::add-proc command pid)))
+    (if (= CLOSED_FD M::sink)
+	(let* ((p (pipe))
+	       (M' (do-spawn (M::set-sink (:write-end p)) (:read-end p))))
+	  (close (:write-end p))
+	  (M'::set-sink CLOSED_FD))
+	(do-spawn M CLOSED_FD))))
+
+(define (pipe:splice sink)
+  (lambda (M)
+    (splice M::source sink)
+    (M::set-source CLOSED_FD)))
+
+(define (pipe:write-to pathname flags mode)
+  (open pathname flags mode))
+
+;;
+;; Monadic transformer support.
+;;
+
+(define (tr:do . commands)
+  (let loop ((tmpfiles '()) (source  #f) (cmds commands))
+    (if (null? cmds)
+	(for-each remove-temporary-file tmpfiles)
+	(let* ((v ((car cmds) tmpfiles source))
+	       (tmpfiles' (car v))
+	       (sink (cadr v))
+	       (error (caddr v)))
+	  (if error
+	      (begin
+		(for-each remove-temporary-file tmpfiles')
+		(apply throw error)))
+	  (loop tmpfiles' sink (cdr cmds))))))
+
+(define (tr:open pathname)
+  (lambda (tmpfiles source)
+    (list tmpfiles pathname #f)))
+
+(define (tr:spawn input command)
+  (lambda (tmpfiles source)
+    (if (and (member '**in** command) (not source))
+	(fail (string-append (stringify cmd) " needs an input")))
+    (let* ((t (make-temporary-file))
+	   (cmd (map (lambda (x)
+		       (cond
+			((equal? '**in** x) source)
+			((equal? '**out** x) t)
+			(else x))) command)))
+      (catch (list (cons t tmpfiles) t *error*)
+	     (call-popen cmd input)
+	     (if (and (member '**out** command) (not (file-exists? t)))
+		 (fail (string-append (stringify cmd)
+				       " did not produce '" t "'.")))
+	     (list (cons t tmpfiles) t #f)))))
+
+(define (tr:write-to pathname)
+  (lambda (tmpfiles source)
+    (rename source pathname)
+    (list tmpfiles pathname #f)))
+
+(define (tr:pipe-do . commands)
+  (lambda (tmpfiles source)
+    (let ((t (make-temporary-file)))
+      (apply pipe:do
+        `(,@(if source `(,(pipe:open source (logior O_RDONLY O_BINARY))) '())
+	  ,@commands
+	  ,(pipe:write-to t (logior O_WRONLY O_BINARY O_CREAT) #o600)))
+      (list (cons t tmpfiles) t #f))))
+
+(define (tr:assert-identity reference)
+  (lambda (tmpfiles source)
+    (if (not (file=? source reference))
+	(fail "mismatch"))
+    (list tmpfiles source #f)))
+
+(define (tr:assert-weak-identity reference)
+  (lambda (tmpfiles source)
+    (if (not (text-file=? source reference))
+	(fail "mismatch"))
+    (list tmpfiles source #f)))
+
+(define (tr:call-with-content function . args)
+  (lambda (tmpfiles source)
+    (catch (list tmpfiles source *error*)
+	   (apply function `(,(call-with-input-file source read-all) ,@args)))
+    (list tmpfiles source #f)))
+
+;;
+;; Developing and debugging tests.
+;;
+
+;; Spawn an os shell.
+(define (interactive-shell)
+  (call-with-fds `(,(getenv "SHELL") -i) 0 1 2))
+
+;;
+;; The main test framework.
+;;
+
+(define semaphore
+  (package
+   (define (new n)
+     (package
+      (define (acquire!?)
+	(if (> n 0)
+	    (begin
+	      (set! n (- n 1))
+	      #t)
+	    #f))
+      (define (release!)
+	(set! n (+ n 1)))))))
+
+;; A pool of tests.
+(define test-pool
+  (package
+   (define (new n)
+     (package
+      ;; A semaphore to restrict the number of spawned processes.
+      (define sem (semaphore::new n))
+
+      ;; A list of enqueued, but not yet run tests.
+      (define enqueued '())
+
+      ;; A list of running or finished processes.
+      (define procs '())
+
+      (define (add test)
+	(if (test::started?)
+	    (set! procs (cons test procs))
+	    (if (sem::acquire!?)
+		(add (test::run-async))
+		(set! enqueued (cons test enqueued))))
+	(current-environment))
+
+      ;; Pop the last of the enqueued tests off the fifo queue.
+      (define (pop-test!)
+	(let ((i (length enqueued)))
+	  (assert (> i 0))
+	  (cond
+	   ((= i 1)
+	    (let ((test (car enqueued)))
+	      (set! enqueued '())
+	      test))
+	   (else
+	    (let* ((tail (list-tail enqueued (- i 2)))
+		   (test (cadr tail)))
+	      (set-cdr! tail '())
+	      (assert (= (length enqueued) (- i 1)))
+	      test)))))
+
+      (define (pid->test pid)
+	(let ((t (filter (lambda (x) (= pid x::pid)) procs)))
+	  (if (null? t) #f (car t))))
+      (define (wait)
+	(if (null? enqueued)
+	    ;; If no tests are enqueued, we can just block until all
+	    ;; of them finished.
+	    (wait' #t)
+	    ;; Otherwise, we must not block, but give some tests the
+	    ;; chance to finish so that we can start new ones.
+	    (begin
+	      (wait' #f)
+	      (usleep (/ 1000000 10))
+	      (wait))))
+      (define (wait' hang)
+	(let ((unfinished (filter (lambda (t) (not t::retcode)) procs)))
+	  (if (null? unfinished)
+	      (current-environment)
+	      (let ((names (map (lambda (t) t::name) unfinished))
+		    (pids (map (lambda (t) t::pid) unfinished))
+		    (any #f))
+		(for-each
+		 (lambda (test retcode)
+		   (unless (< retcode 0)
+			   (test::set-end-time!)
+			   (test:::set! 'retcode retcode)
+			   (test::report)
+			   (sem::release!)
+			   (set! any #t)))
+		 (map pid->test pids)
+		 (wait-processes (map stringify names) pids hang))
+
+		;; If some processes finished, try to start new ones.
+		(let loop ()
+		  (cond
+		   ((not any) #f)
+		   ((pair? enqueued)
+		    (if (sem::acquire!?)
+			(let ((test (pop-test!)))
+			  (add (test::run-async))
+			  (loop)))))))))
+	(current-environment))
+      (define (filter-tests status)
+	(filter (lambda (p) (eq? status (p::status))) procs))
+      (define (report)
+	(define (print-tests tests message)
+	  (unless (null? tests)
+		  (apply echo (cons message
+				    (map (lambda (t) t::name) tests)))))
+
+	(let ((failed (filter-tests 'FAIL))
+	      (xfailed (filter-tests 'XFAIL))
+	      (xpassed (filter-tests 'XPASS))
+	      (skipped (filter-tests 'SKIP)))
+          (echo "===================")
+	  (echo (length procs) "tests run,"
+		(length (filter-tests 'PASS)) "succeeded,"
+		(length failed) "failed,"
+		(length xfailed) "failed expectedly,"
+		(length xpassed) "succeeded unexpectedly,"
+		(length skipped) "skipped.")
+	  (print-tests failed "Failed tests:")
+	  (print-tests xfailed "Expectedly failed tests:")
+	  (print-tests xpassed "Unexpectedly passed tests:")
+	  (print-tests skipped "Skipped tests:")
+          (echo "===================")
+	  (+ (length failed) (length xpassed))))
+
+      (define (xml)
+	(xx::document
+	 (xx::tag 'testsuites
+		  `((xmlns:xsi "http://www.w3.org/2001/XMLSchema-instance")
+		    ("xsi:noNamespaceSchemaLocation"
+		     "https://windyroad.com.au/dl/Open%20Source/JUnit.xsd"))
+		  (map (lambda (t) (t::xml)) procs))))))))
+
+(define (verbosity n)
+  (if (= 0 n) '() (cons '--verbose (verbosity (- n 1)))))
+
+(define (locate-test path)
+  (if (absolute-path? path) path (in-srcdir path)))
+
+;; A single test.
+(define test
+ (begin
+
+  ;; Private definitions.
+
+  (define (isotime->junit t)
+    "[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}"
+    "20170418T145809"
+    (string-append (substring t 0 4)
+		   "-"
+		   (substring t 4 6)
+		   "-"
+		   (substring t 6 11)
+		   ":"
+		   (substring t 11 13)
+		   ":"
+		   (substring t 13 15)))
+
+  ;; If a tests name ends with a bang (!), it is expected to fail.
+  (define (expect-failure? name)
+    (string-suffix? name "!"))
+  ;; Strips the bang (if any).
+  (define (test-name name)
+    (if (expect-failure? name)
+	(substring name 0 (- (string-length name) 1))
+	name))
+
+  (package
+   (define (scm setup name path . args)
+     ;; Start the process.
+     (define (spawn-scm args' in out err)
+       (spawn-process-fd `(,*argv0* ,@(verbosity (*verbose*))
+				    ,(locate-test (test-name path))
+				    ,@(if setup (force setup) '())
+				    ,@args' ,@args) in out err))
+     (new name #f spawn-scm #f #f CLOSED_FD (expect-failure? name)))
+
+   (define (binary setup name path . args)
+     ;; Start the process.
+     (define (spawn-binary args' in out err)
+       (spawn-process-fd `(,(test-name path)
+			   ,@(if setup (force setup) '()) ,@args' ,@args)
+			 in out err))
+     (new name #f spawn-binary #f #f CLOSED_FD (expect-failure? name)))
+
+   (define (new name directory spawn pid retcode logfd expect-failure)
+     (package
+
+      ;; XXX: OO glue.
+      (define self (current-environment))
+      (define (:set! key value)
+	(eval `(set! ,key ,value) (current-environment))
+	(current-environment))
+
+      ;; The log is written here.
+      (define log-file-name #f)
+
+      ;; Record time stamps.
+      (define timestamp #f)
+      (define start-time 0)
+      (define end-time 0)
+
+      (define (set-start-time!)
+	(set! timestamp (isotime->junit (get-isotime)))
+	(set! start-time (get-time)))
+      (define (set-end-time!)
+	(set! end-time (get-time)))
+
+      ;; Has the test been started yet?
+      (define (started?)
+	(number? pid))
+
+      (define (open-log-file)
+	(unless log-file-name
+		(set! log-file-name (string-append (basename name) ".log")))
+	(catch '() (unlink log-file-name))
+	(open log-file-name (logior O_RDWR O_BINARY O_CREAT) #o600))
+
+      (define (run-sync . args)
+	(set-start-time!)
+	(letfd ((log (open-log-file)))
+	  (with-working-directory directory
+	    (let* ((p (inbound-pipe))
+		   (pid' (spawn args 0 (:write-end p) (:write-end p))))
+	      (close (:write-end p))
+	      (splice (:read-end p) STDERR_FILENO log)
+	      (close (:read-end p))
+	      (set! pid pid')
+	      (set! retcode (wait-process name pid' #t)))))
+	(report)
+	(current-environment))
+      (define (run-sync-quiet . args)
+	(set-start-time!)
+	(with-working-directory directory
+	  (set! pid (spawn args CLOSED_FD CLOSED_FD CLOSED_FD)))
+	(set! retcode (wait-process name pid #t))
+	(set-end-time!)
+	(current-environment))
+      (define (run-async . args)
+	(set-start-time!)
+	(let ((log (open-log-file)))
+	  (with-working-directory directory
+	    (set! pid (spawn args CLOSED_FD log log)))
+	  (set! logfd log))
+	(current-environment))
+      (define (status)
+	(let* ((t' (assoc retcode '((0 PASS) (77 SKIP) (99 ERROR))))
+	       (t (if (not t') 'FAIL (cadr t'))))
+	  (if expect-failure
+	      (case t ((PASS) 'XPASS) ((FAIL) 'XFAIL) (else t))
+	      t)))
+      (define (status-string)
+	(cadr (assoc (status) '((PASS "PASS")
+			       (SKIP "SKIP")
+			       (ERROR "ERROR")
+			       (FAIL "FAIL")
+			       (XPASS "XPASS")
+			       (XFAIL "XFAIL")))))
+      (define (report)
+	(unless (= logfd CLOSED_FD)
+		(seek logfd 0 SEEK_SET)
+		(splice logfd STDERR_FILENO)
+		(close logfd))
+	(echo (string-append (status-string) ":") name))
+
+      (define (xml)
+	(xx::tag
+	 'testsuite
+	 `((name ,name)
+	   (time ,(- end-time start-time))
+	   (package ,(dirname name))
+	   (id 0)
+	   (timestamp ,timestamp)
+	   (hostname "unknown")
+	   (tests 1)
+	   (failures ,(if (eq? FAIL (status)) 1 0))
+	   (errors ,(if (eq? ERROR (status)) 1 0)))
+	 (list
+	  (xx::tag 'properties)
+	  (xx::tag 'testcase
+		   `((name ,(basename name))
+		     (classname ,(string-translate (dirname name) "/" "."))
+		     (time ,(- end-time start-time)))
+		   `(,@(case (status)
+			 ((PASS XFAIL) '())
+			 ((SKIP) (list (xx::tag 'skipped)))
+			 ((ERROR) (list
+				   (xx::tag 'error '((message "Unknown error.")))))
+			 (else
+			  (list (xx::tag 'failure '((message "Unknown error."))))))))
+	  (xx::tag 'system-out '()
+		   (list (xx::textnode (read-all (open-input-file log-file-name)))))
+	  (xx::tag 'system-err '() (list (xx::textnode "")))))))))))
+
+;; Run the setup target to create an environment, then run all given
+;; tests in parallel.
+(define (run-tests-parallel tests n)
+  (let loop ((pool (test-pool::new n)) (tests' tests))
+    (if (null? tests')
+	(let ((results (pool::wait)))
+	  ((results::xml) (open-output-file "report.xml"))
+	  (exit (results::report)))
+	(let ((wd (mkdtemp-autoremove))
+	      (test (car tests')))
+	  (test:::set! 'directory wd)
+	  (loop (pool::add test)
+		(cdr tests'))))))
+
+;; Run the setup target to create an environment, then run all given
+;; tests in sequence.
+(define (run-tests-sequential tests)
+  (let loop ((pool (test-pool::new 1)) (tests' tests))
+    (if (null? tests')
+	(let ((results (pool::wait)))
+	  ((results::xml) (open-output-file "report.xml"))
+	  (exit (results::report)))
+	(let ((wd (mkdtemp-autoremove))
+	      (test (car tests')))
+	  (test:::set! 'directory wd)
+	  (loop (pool::add (test::run-sync))
+		(cdr tests'))))))
+
+;; Run tests either in sequence or in parallel, depending on the
+;; number of tests and the command line flags.
+(define (run-tests tests)
+  (let ((parallel (flag "--parallel" *args*))
+	(default-parallel-jobs 32))
+    (if (and parallel (> (length tests) 1))
+	(run-tests-parallel tests (if (and (pair? parallel)
+					   (string->number (car parallel)))
+				      (string->number (car parallel))
+				      default-parallel-jobs))
+	(run-tests-sequential tests))))
+
+;; Load all tests from the given path.
+(define (load-tests . path)
+  (load (apply in-srcdir `(,@path "all-tests.scm")))
+  all-tests)
+
+;; Helper to create environment caches from test functions.  SETUP
+;; must be a test implementing the producer side cache protocol.
+;; Returns a promise containing the arguments that must be passed to a
+;; test implementing the consumer side of the cache protocol.
+(define (make-environment-cache setup)
+  (delay (with-temporary-working-directory
+	  (let ((tarball (make-temporary-file "environment-cache")))
+	    (atexit (lambda () (remove-temporary-file tarball)))
+	    (setup::run-sync '--create-tarball tarball)
+	    (if (not (equal? 'PASS (setup::status)))
+		(fail "Setup failed."))
+	    `(--unpack-tarball ,tarball)))))
+
+;; Command line flag handling.  Returns the elements following KEY in
+;; ARGUMENTS up to the next argument, or #f if KEY is not in
+;; ARGUMENTS.  If 'KEY=XYZ' is encountered, then the singleton list
+;; containing 'XYZ' is returned.
+(define (flag key arguments)
+  (cond
+   ((null? arguments)
+    #f)
+   ((string=? key (car arguments))
+    (let loop ((acc '())
+	       (args (cdr arguments)))
+      (if (or (null? args) (string-prefix? (car args) "--"))
+	  (reverse acc)
+	  (loop (cons (car args) acc) (cdr args)))))
+   ((string-prefix? (car arguments) (string-append key "="))
+    (list (substring (car arguments)
+		     (+ (string-length key) 1)
+		     (string-length (car arguments)))))
+   ((string=? "--" (car arguments))
+    #f)
+   (else
+    (flag key (cdr arguments)))))
+(assert (equal? (flag "--xxx" '("--yyy")) #f))
+(assert (equal? (flag "--xxx" '("--xxx")) '()))
+(assert (equal? (flag "--xxx" '("--xxx" "yyy")) '("yyy")))
+(assert (equal? (flag "--xxx" '("--xxx=foo" "yyy")) '("foo")))
+(assert (equal? (flag "--xxx" '("--xxx" "yyy" "zzz")) '("yyy" "zzz")))
+(assert (equal? (flag "--xxx" '("--xxx" "yyy" "zzz" "--")) '("yyy" "zzz")))
+(assert (equal? (flag "--xxx" '("--xxx" "yyy" "--" "zzz")) '("yyy")))
+(assert (equal? (flag "--" '("--" "xxx" "yyy" "--" "zzz")) '("xxx" "yyy")))