diff --git a/antsibull-nox.toml b/antsibull-nox.toml
index dbb5985e1d..271147f3f0 100644
--- a/antsibull-nox.toml
+++ b/antsibull-nox.toml
@@ -20,6 +20,7 @@ stable_branches = [ "stable-*" ]
 [sessions]
 
 [sessions.lint]
+code_files = ["."]  # consider all Python files in the collection
 run_isort = false
 run_black = false
 run_ruff_check = true
diff --git a/ruff.toml b/ruff.toml
index c4c0354847..3c7ee4dc0a 100644
--- a/ruff.toml
+++ b/ruff.toml
@@ -4,9 +4,6 @@
 
 line-length = 120
 
-# Include only the files:
-include = ["plugins/**/*.py", "tests/unit/**/*.py", "noxfile.py"]
-
 [lint]
 # https://docs.astral.sh/ruff/rules/