diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..edd567f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/test*.tar
diff --git a/test-chibi.scm b/test-chibi.scm
index 74ff515..e6de675 100755
--- a/test-chibi.scm
+++ b/test-chibi.scm
@@ -3,13 +3,25 @@
 (import (scheme base)
         (scheme file)
         (scheme process-context)
+        (scheme read)
         (scheme write)
-        (tex-parser))
+        (trivial-tar-writer))
+
+(define (slurp-binary-file filename)
+  (call-with-port
+   (open-binary-input-file filename)
+   (lambda (port)
+     (let loop ((whole (make-bytevector 0)))
+       (let ((part (read-bytevector 4096 port)))
+         (if (eof-object? part)
+             whole
+             (loop (bytevector-append whole part))))))))
+
+(tar-write-file "hello/world.text"
+                (slurp-binary-file "trivial-tar-writer.scm"))
 
 (define (main arguments)
-  (for-each (lambda (tex-file)
-              (display (with-input-from-file tex-file read-tex-document))
-              (newline))
+  (for-each (lambda (file) (tar-write-file file (slurp-binary-file file)))
             (cdr arguments)))
 
 (main (command-line))
diff --git a/test-tex-chibi.scm b/test-tex-chibi.scm
new file mode 100644
index 0000000..74ff515
--- /dev/null
+++ b/test-tex-chibi.scm
@@ -0,0 +1,15 @@
+#! /usr/bin/env chibi-scheme
+
+(import (scheme base)
+        (scheme file)
+        (scheme process-context)
+        (scheme write)
+        (tex-parser))
+
+(define (main arguments)
+  (for-each (lambda (tex-file)
+              (display (with-input-from-file tex-file read-tex-document))
+              (newline))
+            (cdr arguments)))
+
+(main (command-line))
diff --git a/test.sh b/test.sh
new file mode 100755
index 0000000..a78be35
--- /dev/null
+++ b/test.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+set -eux
+./test-chibi.scm trivial-tar-writer.scm >test-our.tar
+bsdtar -cf test-bsd.tar trivial-tar-writer.scm
+gtar -cf test-gnu.tar trivial-tar-writer.scm
+hexdump -C test-our.tar
+echo
+echo
+echo
+hexdump -C test-gnu.tar
+echo
+echo
+echo
+hexdump -C test-bsd.tar