diff --git a/t/format-ssa-file.t b/t/format-ssa-file.t
new file mode 100644
index 0000000..d4cf04c
--- /dev/null
+++ b/t/format-ssa-file.t
@@ -0,0 +1,41 @@
+use strict;
+use warnings;
+
+use Test::More tests => 62;
+
+use Subtitle::SSA::File;
+
+sub random_data {
+  my $data = '';
+  my $len = 100 + int(rand(100));
+  open my $FH, '<', '/dev/urandom'
+    or die "can't open: /dev/urandom -- $!\n";
+  read($FH, $data, $len);
+  close $FH;
+  return $data;
+}
+
+my $file = Subtitle::SSA::File->new;
+is(ref $file, 'Subtitle::SSA::File');
+can_ok($file, qw(new error size type name parse_uue_line binary uue_line uue_block));
+undef $file;
+
+for (my $i = 0; $i < 15; $i++) {
+  my $bin = random_data();
+  $file = Subtitle::SSA::File->new;
+  $file->binary($bin);
+  is($file->size => length $bin);
+  my $uue = $file->uue_line;
+  isnt($uue, '');
+  ok(length($uue) % 4 != 1);
+  my $invalid = 0;
+  for my $char (split(//, $uue)) {
+    next if ord($char) >= 33 and ord($char) <= 96;
+    $invalid = 1;
+    diag sprintf("unexpected char in encoded text: %s (code 0x%02X)", $char, ord($char));
+    last;
+  }
+  is($invalid, 0);
+}
+
+exit 0;