diff --git a/tests/test_get_read_orientation.py b/tests/test_get_read_orientation.py
index ddd9fb6..b73b8e2 100644
--- a/tests/test_get_read_orientation.py
+++ b/tests/test_get_read_orientation.py
@@ -73,6 +73,10 @@ def test_init_all(self, tmpdir):
         CONFIG.args.path_2_processed = FILE_MATE_2
         CONFIG.args.t_file_processed = FILE_TRANSCRIPTS
         CONFIG.args.tmp_dir = tmpdir
+        CONFIG.results.library_source = ResultsSource(
+            file_1=Source(),
+            file_2=Source()
+        )
         test_instance = GetOrientation(config=CONFIG,
                                        mapping=MAPPING)
         assert test_instance.paths[0] == FILE_MATE_1