diff --git a/blob/local_store.go b/blob/local_store.go
index 418b154..76f7924 100644
--- a/blob/local_store.go
+++ b/blob/local_store.go
@@ -109,6 +109,11 @@ func (l *LocalStore) List(ctx context.Context) ([]ID, error) {
 	}
 
 	for _, binFileEntry := range dir {
+		if binFileEntry.IsDir() {
+			// Do not include directories
+			continue
+		}
+
 		idString, isBin := strings.CutSuffix(binFileEntry.Name(), ".bin")
 		if !isBin {
 			// Do not include files that don't end in .bin
diff --git a/integration/singularity/id_map.go b/integration/singularity/id_map.go
index faed2e6..f7bac18 100644
--- a/integration/singularity/id_map.go
+++ b/integration/singularity/id_map.go
@@ -4,7 +4,6 @@ import (
 	"errors"
 	"fmt"
 	"os"
-	"path"
 	"path/filepath"
 	"strconv"
 
@@ -22,7 +21,7 @@ func newIDMap(dir string) *idMap {
 }
 
 func (im *idMap) path(blobID blob.ID) string {
-	return path.Join(im.dir, blobID.String()+".id")
+	return filepath.Join(im.dir, blobID.String()+".id")
 }
 
 // Inserts a blob ID to Singularity ID mapping.
@@ -53,7 +52,7 @@ func (im *idMap) insert(blobID blob.ID, singularityID int64) error {
 // Maps blob ID to Singularity ID. Returns blob.ErrBlobNotFound if no mapping
 // exists.
 func (im *idMap) get(blobID blob.ID) (int64, error) {
-	fileIDString, err := os.ReadFile(filepath.Join(im.dir, blobID.String()+".id"))
+	fileIDString, err := os.ReadFile(im.path(blobID))
 	if err != nil {
 		if errors.Is(err, os.ErrNotExist) {
 			return 0, blob.ErrBlobNotFound
diff --git a/integration/singularity/store.go b/integration/singularity/store.go
index dddb4a4..917b084 100644
--- a/integration/singularity/store.go
+++ b/integration/singularity/store.go
@@ -421,6 +421,7 @@ func (s *Store) PassGet(w http.ResponseWriter, r *http.Request, id blob.ID) {
 			return
 		}
 
+		logger.Errorw("Could not get singularity file ID", "err", err)
 		http.Error(w, "", http.StatusInternalServerError)
 		return
 	}