diff --git a/psutil/tests/test_misc.py b/psutil/tests/test_misc.py
index 64b998da3..b3515de31 100755
--- a/psutil/tests/test_misc.py
+++ b/psutil/tests/test_misc.py
@@ -843,8 +843,7 @@ def assert_stdout(exe, *args, **kwargs):
     @staticmethod
     def assert_syntax(exe):
         exe = os.path.join(SCRIPTS_DIR, exe)
-        f = open(exe, encoding="utf8") if PY3 else open(exe)
-        with f:
+        with open(exe, encoding="utf8") if PY3 else open(exe) as f:
             src = f.read()
         ast.parse(src)