diff --git a/tests/library/find_unused_disk.py b/tests/library/find_unused_disk.py
index d9c684a..0f57765 100644
--- a/tests/library/find_unused_disk.py
+++ b/tests/library/find_unused_disk.py
@@ -194,31 +194,31 @@ def run_module():
         interface = module.params["with_interface"]
 
         if interface is not None and not is_device_interface(module, path, interface):
-            info.append("Disk {} attrs {} is not an interface {}".format(path, attrs, interface))
+            info.append("Disk [%s] attrs [%s] is not an interface [%s]" % (path, attrs, interface))
             continue
 
         if attrs["fstype"]:
-            info.append("Disk {} attrs {} has fstype".format(path, attrs))
+            info.append("Disk [%s] attrs [%s] has fstype" % (path, attrs))
             continue
 
         if Size(attrs["size"]).bytes < Size(module.params["min_size"]).bytes:
-            info.append("Disk {} attrs {} size is less than requested".format(path, attrs))
+            info.append("Disk [%s] attrs [%s] size is less than requested" % (path, attrs))
             continue
 
         if max_size.bytes > 0 and Size(attrs["size"]).bytes > max_size.bytes:
-            info.append("Disk {} attrs {} size is greater than requested".format(path, attrs))
+            info.append("Disk [%s] attrs [%s] size is greater than requested" % (path, attrs))
             continue
 
         if get_partitions(path):
-            info.append("Disk {} attrs {} has partitions".format(path, attrs))
+            info.append("Disk [%s] attrs [%s] has partitions" % (path, attrs))
             continue
 
         if not no_holders(get_sys_name(path)):
-            info.append("Disk {} attrs {} has holders".format(path, attrs))
+            info.append("Disk [%s] attrs [%s] has holders" % (path, attrs))
             continue
 
         if not can_open(path):
-            info.append("Disk {} attrs {} cannot be opened exclusively".format(path, attrs))
+            info.append("Disk [%s] attrs [%s] cannot be opened exclusively" % (path, attrs))
             continue
 
         result["disks"].append(os.path.basename(path))