diff --git a/blivetgui/blivet_utils.py b/blivetgui/blivet_utils.py
index 58c92007..f75dda58 100644
--- a/blivetgui/blivet_utils.py
+++ b/blivetgui/blivet_utils.py
@@ -532,7 +532,7 @@ def delete_device(self, blivet_device, delete_parents):
             return result
 
         try:
-            if blivet_device.format.type and not blivet_device.format_immutable:
+            if not blivet_device.format_immutable:
                 ac_fmt = blivet.deviceaction.ActionDestroyFormat(blivet_device)
                 self.storage.devicetree.actions.add(ac_fmt)
                 actions.append(ac_fmt)
@@ -707,8 +707,7 @@ def format_device(self, user_input):
 
         fmt_actions = []
 
-        if user_input.edit_device.format.type is not None:
-            fmt_actions.append(blivet.deviceaction.ActionDestroyFormat(user_input.edit_device))
+        fmt_actions.append(blivet.deviceaction.ActionDestroyFormat(user_input.edit_device))
 
         if user_input.filesystem:
             fmt_actions.extend(self._create_format(user_input, user_input.edit_device))
diff --git a/blivetgui/list_partitions.py b/blivetgui/list_partitions.py
index 9dcfabd7..98c0985a 100644
--- a/blivetgui/list_partitions.py
+++ b/blivetgui/list_partitions.py
@@ -133,7 +133,16 @@ def _add_to_store(self, device, parent_iter=None):
         """
 
         devtype = "lvm" if device.type == "lvmvg" else "raid" if device.type == "mdarray" else device.type
-        fmt = device.format.type if device.format else None
+
+        if device.format.type:
+            fmt = device.format.type
+        else:
+            if device.format.name != "Unknown":
+                # format recognized by blkid but not supported by blivet
+                fmt = device.format.name
+            else:
+                fmt = None
+
         if self.installer_mode:
             mnt = device.format.mountpoint if (device.format and device.format.mountable) else None
         else:
diff --git a/tests/blivetgui_tests/list_partitions_test.py b/tests/blivetgui_tests/list_partitions_test.py
index 5cbf1007..99c6be29 100644
--- a/tests/blivetgui_tests/list_partitions_test.py
+++ b/tests/blivetgui_tests/list_partitions_test.py
@@ -101,9 +101,20 @@ def test_add_to_store(self):
         self.assertEqual(self.list_partitions.partitions_list.get_value(it, 1), device.name)
         self.assertEqual(self.list_partitions.partitions_list.get_value(it, 6), ", ".join(mountpoints))
 
+        # partition with unknown/unsupported filesystem
+        fmt = MagicMock(type=None, mountable=False, label=None)
+        fmt.configure_mock(name="exfat")
+        device = MagicMock(type="partition", size=Size("1 GiB"), path="/dev/vda1",
+                           format=fmt)
+        device.configure_mock(name="vda1")
+        it = self.list_partitions._add_to_store(device)
+        self.assertEqual(self.list_partitions.partitions_list.get_value(it, 3), device.format.name)
+
         # lvmvg with long name -- name should be elipsized and type should be 'lvm'
+        fmt = MagicMock(type=None, mountable=False, label=None)
+        fmt.configure_mock(name="Unknown")
         device = MagicMock(type="lvmvg", size=Size("1 GiB"),
-                           format=MagicMock(type=None, mountable=False, label=None))
+                           format=fmt)
         device.configure_mock(name="".join(["a" for i in range(20)]))
 
         it = self.list_partitions._add_to_store(device)
diff --git a/tests/blivetutils_tests/test_10_disks.py b/tests/blivetutils_tests/test_10_disks.py
index 4cccf22e..9ba06a38 100644
--- a/tests/blivetutils_tests/test_10_disks.py
+++ b/tests/blivetutils_tests/test_10_disks.py
@@ -101,13 +101,18 @@ def test_30_raw_format(self):
         actions = self.format_device(device=blivet_disk, fstype=fs)
 
         # check scheduled actions
-        self.assertEqual(len(actions), 1)
-        self.assertIsInstance(actions[0], blivet.deviceaction.ActionCreateFormat)
+        self.assertEqual(len(actions), 2)
+        self.assertIsInstance(actions[0], blivet.deviceaction.ActionDestroyFormat)
+        self.assertIsInstance(actions[1], blivet.deviceaction.ActionCreateFormat)
 
         self.assertEqual(actions[0].device, blivet_disk)
-        self.assertTrue(actions[0].is_create)
+        self.assertTrue(actions[0].is_destroy)
         self.assertTrue(actions[0].is_format)
 
+        self.assertEqual(actions[1].device, blivet_disk)
+        self.assertTrue(actions[1].is_create)
+        self.assertTrue(actions[1].is_format)
+
         # check that the device has been changed
         blivet_disk = self.get_blivet_device(self.vdevs[0])
         self.assertEqual(blivet_disk.format.type, fs)