diff --git a/test/python_magic_test.py b/test/python_magic_test.py
index b557762..887bdc2 100755
--- a/test/python_magic_test.py
+++ b/test/python_magic_test.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from dataclasses import dataclass
 from enum import Enum
 import os
@@ -129,7 +131,7 @@ class TestFile:
     b"\xce\xbb": [
         (COMMON_MIME, ["text/plain"]),
     ],
-    "b\xce\xbb".decode("utf-8"): [
+    b"\xce\xbb".decode("utf-8"): [
         (COMMON_MIME, ["text/plain"]),
     ],
     "name_use.jpg": [
@@ -184,7 +186,7 @@ def test_all_cases(self):
         shutil.copyfile(os.path.join(MagicTest.TESTDATA_DIR, "lambda"), dest)
         os.environ["TZ"] = "UTC"
         try:
-            for file_name, cases in CASES:
+            for file_name, cases in CASES.items():
                 filename = os.path.join(self.TESTDATA_DIR, file_name)
                 for flags, outputs in cases:
                     m = magic.Magic(**flags)