diff --git a/src/flask/wrappers.py b/src/flask/wrappers.py
index bab610291c..88c6c6ad9f 100644
--- a/src/flask/wrappers.py
+++ b/src/flask/wrappers.py
@@ -192,6 +192,9 @@ def blueprints(self) -> list[str]:
         if name is None:
             return []
 
+        if "." not in name:
+            return [name]
+
         return _split_blueprint_path(name)
 
     def _load_form_data(self) -> None: