diff --git a/.github/workflows/shellcheck.yml b/.github/workflows/shellcheck.yml
index e7db2a2..88cbc66 100644
--- a/.github/workflows/shellcheck.yml
+++ b/.github/workflows/shellcheck.yml
@@ -28,7 +28,10 @@ jobs:
           SEVERITY: ${{ inputs.severity }}
         run: |
           if [ -n "$SCRIPT_DIRS" ]; then
-            find "$SCRIPT_DIRS" -type f -print0 | xargs -0 shellcheck --severity="$SEVERITY"
+            # Split the space-separated list into an array so each dir/file is a
+            # distinct find argument (quoting "$SCRIPT_DIRS" made it a single path).
+            read -ra dirs <<< "$SCRIPT_DIRS"
+            find "${dirs[@]}" -type f -print0 | xargs -0 shellcheck --severity="$SEVERITY"
           else
             find . -name "*.sh" -not -path "./.git/*" -print0 | xargs -0 shellcheck --severity="$SEVERITY"
           fi