diff --git a/src/lightning_utilities/core/imports.py b/src/lightning_utilities/core/imports.py
index 4455bb52..380372d4 100644
--- a/src/lightning_utilities/core/imports.py
+++ b/src/lightning_utilities/core/imports.py
@@ -155,6 +155,8 @@ class ModuleAvailableCache:
     True
     >>> bool(ModuleAvailableCache("unknown_package"))
     False
+    >>> bool(ModuleAvailableCache("unknown.module.path"))
+    False
     """
 
     def __init__(self, module: str) -> None: