diff --git a/cloudbaseinit/tests/utils/windows/test_vfat.py b/cloudbaseinit/tests/utils/windows/test_vfat.py
index 2036e893..d0d821fb 100644
--- a/cloudbaseinit/tests/utils/windows/test_vfat.py
+++ b/cloudbaseinit/tests/utils/windows/test_vfat.py
@@ -52,11 +52,14 @@ class TestVfat(unittest.TestCase):
         self.assertEqual(expected_response, response)
 
     def test_is_vfat_drive_fails(self):
+        test_stderr = b"test stderr"
+
         expected_logging = [
             "Could not retrieve label for VFAT drive path %r"
-            % mock.sentinel.drive,
+            % (mock.sentinel.drive),
+            "mlabel failed with error %r" % test_stderr,
         ]
-        execute_process_value = (None, None, 1)
+        execute_process_value = (None, test_stderr, 1)
         expected_response = False
 
         self._test_is_vfat_drive(execute_process_value=execute_process_value,
diff --git a/cloudbaseinit/utils/windows/vfat.py b/cloudbaseinit/utils/windows/vfat.py
index 86ecbaa5..c9fac8d7 100644
--- a/cloudbaseinit/utils/windows/vfat.py
+++ b/cloudbaseinit/utils/windows/vfat.py
@@ -47,10 +47,11 @@ def is_vfat_drive(osutils, drive_path):
     mlabel = os.path.join(CONF.mtools_path, "mlabel.exe")
     args = [mlabel, "-i", drive_path, "-s"]
 
-    out, _, exit_code = osutils.execute_process(args, shell=False)
+    out, err, exit_code = osutils.execute_process(args, shell=False)
     if exit_code:
         LOG.warning("Could not retrieve label for VFAT drive path %r",
                     drive_path)
+        LOG.warning("mlabel failed with error %r", err)
         return False
 
     out = out.decode().strip()