diff --git a/exampleparser/parser.py b/exampleparser/parser.py
index 7de5802..19ecf47 100644
--- a/exampleparser/parser.py
+++ b/exampleparser/parser.py
@@ -110,4 +110,4 @@ def parse(self, mainfile: str, archive: EntryArchive, logger):
             if magic_source is not None:
                 calc.x_example_magic_value = magic_source
             run.calculation.append(calc)
-        archive.run.append(run)
+        archive.data = run
diff --git a/tests/test_parser.py b/tests/test_parser.py
index 86a8e98..d0afa07 100644
--- a/tests/test_parser.py
+++ b/tests/test_parser.py
@@ -35,7 +35,7 @@ def test_example(parser):
     data_path = os.path.join("tests", "data", "example.out")
     parser.parse(data_path, archive, logging)
 
-    run = archive.run[0]
+    run = archive.data
     assert len(run.system) == 2
     assert len(run.calculation) == 2
     assert run.calculation[0].x_example_magic_value == 42