diff --git a/maintainers/flake-module.nix b/maintainers/flake-module.nix
index 29f8fd1f9..f0268a69d 100644
--- a/maintainers/flake-module.nix
+++ b/maintainers/flake-module.nix
@@ -108,7 +108,6 @@
               # We haven't linted these files yet
               ''^scripts/install-multi-user\.sh$''
               ''^scripts/install-systemd-multi-user\.sh$''
-              ''^tests/functional/ca/common\.sh$''
               ''^tests/functional/ca/concurrent-builds\.sh$''
               ''^tests/functional/characterisation-test-infra\.sh$''
               ''^tests/functional/common/vars-and-functions\.sh$''
diff --git a/tests/functional/ca/common.sh b/tests/functional/ca/common.sh
index 48f1ac46b..dc8e650fd 100644
--- a/tests/functional/ca/common.sh
+++ b/tests/functional/ca/common.sh
@@ -1,3 +1,4 @@
+# shellcheck shell=bash
 source ../common.sh
 
 enableFeatures "ca-derivations"