diff --git a/tests/files/kat.sec b/tests/files/kat.sec
new file mode 100644
index 0000000..b8c960e
--- /dev/null
+++ b/tests/files/kat.sec
@@ -0,0 +1,138 @@
+## 1024R primary secret key, usage C, pasphrase 'katpics'
+-----BEGIN PGP PRIVATE KEY BLOCK-----
+
+lQc+BFGdoeIBEADD7XN3kD/TeMbGdUhOvmBRlp2nDuKx6IKm6tLNHw9PA1ShSwtS
+v9ijldhQwnggyiZZ8P3c6SJRPWrn45YyKUnMhtmRNeEhNx9eQDxCM3Ysu3PUUfVl
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+hEXud8lwAcJn5KpEN+R33iikYtOD2PRDa0zZ4wlkynM=
+=66aD
+-----END PGP PRIVATE KEY BLOCK-----
+
+## 1024R subkey, usage ES, passphrase 'katpics'
+-----BEGIN PGP PRIVATE KEY BLOCK-----
+
+lQIVBFGdoeIBEADD7XN3kD/TeMbGdUhOvmBRlp2nDuKx6IKm6tLNHw9PA1ShSwtS
+v9ijldhQwnggyiZZ8P3c6SJRPWrn45YyKUnMhtmRNeEhNx9eQDxCM3Ysu3PUUfVl
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+/6t6ioyD1DNzaf3V+m5Q5NaDzdbZj9Jw4Sf5pngaLs6Mbhei/GsP0Eoj+XdcSxfN
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+zIzopwVp1sLN/3ZXMUCvHg41Js+urzWBRbMu+Ypm7pldkhKPX6RIy5YMfr2zOLvt
++XulIBTZ7Omfai/wARj3JAwkMR4ssbCKIha56k4RGVDUacS0Xx7h2MmSCDE/9xH0
++lka1PN6+lJuU/Iht39vUcthSaKPyrJvcqElgEsSKg2x0rDXS/WoiFilNakBdBPd
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+/gNlAkdOVQG0FUthdCBIYW5uYWggPGthdEBwaWNzPokCPgQTAQIAKAUCUZ2h4gIb
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+zJOEBFAQiqEWztKO7kcfd7PLnD2zOFoJuMQP/GRLqhecAqZLK+kqwnwZd7hb2zvx
+0ZSrKjx1bdIUae3T/+zUy7WYv9Btn1aERe53yXABwmfkqkQ35HfeKKRi04PY9ENr
+TNnjCWTKcw==
+=AVxa
+-----END PGP PRIVATE KEY BLOCK-----
diff --git a/tests/test_gnupg.py b/tests/test_gnupg.py
index ddd3b69..aa7dcee 100644
--- a/tests/test_gnupg.py
+++ b/tests/test_gnupg.py
@@ -848,30 +848,32 @@ authentication."""
 
     def test_file_encryption_and_decryption(self):
         """Test that encryption/decryption to/from file works."""
-        key = self.generate_key("Andrew Able", "alpha.com",
-                                passphrase="andrewable")
-        andrew = key.fingerprint
-        key = self.generate_key("Barbara Brown", "beta.com",
-                                passphrase="barbarabrown")
-        barbara = key.fingerprint
-        enc_outf = file(os.path.join(self.gpg.homedir, 'to-b.gpg'), 'w+')
-        dec_outf = file(os.path.join(self.gpg.homedir, 'to-b.txt'), 'w+')
-        data = "Hello, world!"
-        data_file = _util._make_binary_stream(data, self.gpg.encoding)
-        edata = self.gpg.encrypt_file(data_file, barbara,
-                                      armor=False,
-                                      output=enc_outf)
-        ddata = self.gpg.decrypt_file(enc_outf, passphrase="barbarabrown",
-                                      output=dec_outf)
-        enc_outf.seek(0, 0) # can't use os.SEEK_SET in 2.4
-        dec_outf.seek(0, 0)
-        enc_data = enc_outf.read()
-        dec_data = dec_outf.read()
-        data = data.encode(self.gpg.encoding)
-        if ddata != data:
-            log.debug("was: %r", data)
-            log.debug("new: %r", dec_data)
-        self.assertEqual(data, dec_data)
+        with open(os.path.join(_files, 'kat.sec')) as katsec:
+            self.gpg.import_keys(katsec.read())
+
+        kat = self.gpg.list_keys('kat')[0]['fingerprint']
+
+        enc_outf = os.path.join(self.gpg.homedir, 'to-b.gpg')
+        dec_outf = os.path.join(self.gpg.homedir, 'to-b.txt')
+
+        message_file = os.path.join(_files, 'cypherpunk_manifesto')
+        with open(message_file) as msg:
+            data = msg.read()
+            ## GnuPG seems to ignore the output directive...
+            edata = self.gpg.encrypt(data, kat, output=enc_outf)
+            with open(enc_outf, 'w+') as enc:
+                enc.write(str(edata))
+
+            with open(enc_outf) as enc2:
+                fdata = enc2.read()
+                ddata = str(self.gpg.decrypt(fdata, passphrase="overalls"))
+
+                data = data.encode(self.gpg.encoding)
+                if ddata != data:
+                    log.debug("data was: %r" % data)
+                    log.debug("new (from filehandle): %r" % fdata)
+                    log.debug("new (from decryption): %r" % ddata)
+                    self.assertEqual(data, ddata)
 
 
 suites = { 'parsers': set(['test_parsers_fix_unsafe',