small formatting

eossr/metadata/tests/test_codemeta2zenodo.py

@@ -97,12 +97,12 @@ def test_add_author_metadata():
                                             person
                                             )
 
-    assert 'creators' in zenodo_metadata.keys()
+    assert 'creators' in zenodo_metadata
     # 4 'creators' one repeated, should not be duplicated.
     # Maintainer and Contributor. Author and Creator are the same person
     assert len(zenodo_metadata['creators']) == 3
 
-    assert 'contributors' in zenodo_metadata.keys()
+    assert 'contributors' in zenodo_metadata
     # Editor, Producer, Publisher, Provider and Sponsor
     assert len(zenodo_metadata['contributors']) == 5