diff --git a/maintainers/flake-module.nix b/maintainers/flake-module.nix
index f527a6d39..f83ad2a7c 100644
--- a/maintainers/flake-module.nix
+++ b/maintainers/flake-module.nix
@@ -130,8 +130,6 @@
               ''^tests/functional/local-overlay-store/check-post-init-inner\.sh$''
               ''^tests/functional/local-overlay-store/check-post-init\.sh$''
               ''^tests/functional/local-overlay-store/common\.sh$''
-              ''^tests/functional/local-overlay-store/delete-duplicate-inner\.sh$''
-              ''^tests/functional/local-overlay-store/delete-duplicate\.sh$''
               ''^tests/functional/logging\.sh$''
               ''^tests/functional/misc\.sh$''
               ''^tests/functional/multiple-outputs\.sh$''
diff --git a/tests/functional/local-overlay-store/delete-duplicate.sh b/tests/functional/local-overlay-store/delete-duplicate.sh
index e3b94e1cb..8a11350dc 100644
--- a/tests/functional/local-overlay-store/delete-duplicate.sh
+++ b/tests/functional/local-overlay-store/delete-duplicate.sh
@@ -1,3 +1,4 @@
+# shellcheck shell=bash
 source common.sh
 source ../common/init.sh