diff --git a/src/tox/config/source/discover.py b/src/tox/config/source/discover.py
index 84348c4f6..f04b9a7a0 100644
--- a/src/tox/config/source/discover.py
+++ b/src/tox/config/source/discover.py
@@ -68,7 +68,7 @@ def _locate_source() -> Source | None:
 
 def _load_exact_source(config_file: Path) -> Source:
     # if the filename matches to the letter some config file name do not fallback to other source types
-    exact_match = list(s for s in SOURCE_TYPES if config_file.name == s.FILENAME)  # pragma: no cover
+    exact_match = [s for s in SOURCE_TYPES if config_file.name == s.FILENAME]  # pragma: no cover
     for src_type in exact_match or SOURCE_TYPES:  # pragma: no branch
         try:
             return src_type(config_file)