diff --git a/nixos/modules/system/activation/lib/test.sh b/nixos/modules/system/activation/lib/test.sh
index 9b146383ad4b..1f38eddfc231 100755
--- a/nixos/modules/system/activation/lib/test.sh
+++ b/nixos/modules/system/activation/lib/test.sh
@@ -26,6 +26,7 @@ onerr() {
 }
 trap onerr ERR
 
+# shellcheck source-path=SCRIPTDIR
 source ./lib.sh
 
 (warn hi, this works >/dev/null) 2>&1 | grep -E $'.*warning:.* hi, this works' >/dev/null