diff --git a/sflock/unpack/zip7.py b/sflock/unpack/zip7.py
index 9f8a61cc..f1c73fd3 100644
--- a/sflock/unpack/zip7.py
+++ b/sflock/unpack/zip7.py
@@ -13,9 +13,9 @@
 class Zip7File(Unpacker):
     name = "7zfile"
     exe = "/usr/bin/7z"
-    exts = b".7z", b".iso"
+    exts = b".7z", b".iso", b".xz"
     # TODO Should we use "isoparser" (check PyPI) instead of 7z?
-    magic = "7-zip archive", "ISO 9660"
+    magic = "7-zip archive", "ISO 9660", "UDF filesystem data", "XZ compressed data"
 
     def unpack(self, password=None, duplicates=None):
         dirpath = tempfile.mkdtemp()
diff --git a/tests/test_magic.py b/tests/test_magic.py
index 4a6965f9..b3b57acc 100644
--- a/tests/test_magic.py
+++ b/tests/test_magic.py
@@ -18,8 +18,8 @@ def test_magic():
 
 def test_magic_exception():
     assert magic.from_file(
-        "tests/files/invld.elf_"
-    ).startswith("ELF")
+        b"tests/files/invld.elf_"
+    ).startswith(b"ELF")
     assert magic.from_buffer(
-        open("tests/files/invld.elf_", "rb").read()
+        open(b"tests/files/invld.elf_", "rb").read()
     ).startswith("ELF")
diff --git a/tests/test_main.py b/tests/test_main.py
index 87135fd5..1e2a14cc 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -13,7 +13,7 @@ def test_supported():
     assert supported()
 
 def test_count_supported():
-    count = 9
+    count = 10
 
     if AceFile(None).supported():
         count += 1