diff --git a/unittests/test_directories/example_substitutions/ExperimentalData/file.data b/unittests/test_directories/example_substitutions/ExperimentalData/file.data
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/unittests/test_directories/example_substitutions/substitutions_parents.yml b/unittests/test_directories/example_substitutions/substitutions_parents.yml
index ef825e2557c99ba57f137b1629db862b6b46693e..2e208b522cc79569a7679a9df4ba7782ad1fe1c3 100644
--- a/unittests/test_directories/example_substitutions/substitutions_parents.yml
+++ b/unittests/test_directories/example_substitutions/substitutions_parents.yml
@@ -35,4 +35,4 @@ ExperimentalData:  # name of the converter
       match: ".*\\.data"
       records:
         RecordThatGetsParentsLater:
-          someId: 23
+          someId: "23"