diff --git a/recopytex/database/filesystem/loader.py b/recopytex/database/filesystem/loader.py
index 954de5e..baa102c 100644
--- a/recopytex/database/filesystem/loader.py
+++ b/recopytex/database/filesystem/loader.py
@@ -106,7 +106,9 @@ class CSVLoader(Loader):
                     self._config["id_templates"]["exam"], exam.iloc[0]
                 )
                 exams.append(exam)
-        return pd.concat(exams)
+        if exams:
+            return pd.concat(exams)
+        return pd.DataFrame(columns=["name", "date", "term", "origin", "tribe", "id"])
 
     def get_exam_questions(self, exams=[]):
         """Get questions for exams stored in score_files