diff --git a/testlib/dbus.py b/testlib/dbus.py
index e4dc055..1104f4e 100644
--- a/testlib/dbus.py
+++ b/testlib/dbus.py
@@ -487,11 +487,9 @@ def fs_create(pool_path, fs_name, *, fs_size=None, fs_sizelimit=None):
         )
 
         file_spec = (
-            (fs_name, (False, ""), (False, ""))
-            if fs_size is None
-            else (fs_name, (True, fs_size), (False, ""))
-            if fs_sizelimit is None
-            else (fs_name, (True, fs_size), (True, fs_sizelimit))
+            fs_name,
+            (False, "") if fs_size is None else (True, fs_size),
+            (False, "") if fs_sizelimit is None else (True, fs_sizelimit),
         )
 
         return iface.CreateFilesystems([file_spec], timeout=StratisDbus._TIMEOUT)