diff --git a/pmb/helpers/devices.py b/pmb/helpers/devices.py
index 68c29e6f..dc39817b 100644
--- a/pmb/helpers/devices.py
+++ b/pmb/helpers/devices.py
@@ -51,6 +51,21 @@ class DeviceCategory(Enum):
             DeviceCategory.DOWNSTREAM,
         ]
 
+    def allows_downstream_ports(self) -> bool:
+        """Check whether a given category is allowed to contain downstream ports. This does not
+        necessarily mean that it exclusively contains downstream ports.
+
+        :returns: True, if the category allows downstream ports, False if only allows mainline ports.
+        """
+
+        match self:
+            case DeviceCategory.ARCHIVED | DeviceCategory.DOWNSTREAM:
+                return True
+            case DeviceCategory.TESTING | DeviceCategory.COMMUNITY | DeviceCategory.MAIN:
+                return False
+            case _:
+                raise AssertionError
+
     def explain(self) -> str:
         """Provide an explanation of a given category.
 
diff --git a/pmb/install/format.py b/pmb/install/format.py
index 8e898a82..e598f7fc 100644
--- a/pmb/install/format.py
+++ b/pmb/install/format.py
@@ -1,7 +1,7 @@
 # Copyright 2023 Oliver Smith
 # SPDX-License-Identifier: GPL-3.0-or-later
 from pmb.helpers import logging
-from pmb.helpers.devices import get_device_category_by_name, DeviceCategory
+from pmb.helpers.devices import get_device_category_by_name
 import pmb.chroot
 from pmb.core import Chroot
 from pmb.core.context import get_context
@@ -177,7 +177,7 @@ def format_and_mount_root(
         if filesystem == "ext4":
             device_category = get_device_category_by_name(get_context().config.device)
 
-            if device_category == DeviceCategory.DOWNSTREAM:
+            if device_category.allows_downstream_ports():
                 # Some downstream kernels don't support metadata_csum (#1364).
                 # When changing the options of mkfs.ext4, also change them in the
                 # recovery zip code (see 'grep -r mkfs\.ext4')!