diff --git a/vulnerabilities/importers/xen.py b/vulnerabilities/importers/xen.py
index 519df6bb8..d89f72c44 100644
--- a/vulnerabilities/importers/xen.py
+++ b/vulnerabilities/importers/xen.py
@@ -48,7 +48,7 @@ def to_advisories(self, xsa):
             references.append(XsaReference.from_number(number=xsa_id))
         title = xsa.get("title")
         for cve in xsa.get("cve") or []:
-       #TODO: https://github.com/nexB/vulnerablecode/issues/981
+            # TODO: https://github.com/nexB/vulnerablecode/issues/981
             if not is_cve(cve):
                 continue
             yield AdvisoryData(
diff --git a/vulnerabilities/tests/test_data/parse-advisory-xen-expected.json b/vulnerabilities/tests/test_data/parse-advisory-xen-expected.json
index 2acffa444..040c75fe1 100644
--- a/vulnerabilities/tests/test_data/parse-advisory-xen-expected.json
+++ b/vulnerabilities/tests/test_data/parse-advisory-xen-expected.json
@@ -12,6 +12,7 @@
         "severities": []
       }
     ],
-    "date_published": null
+    "date_published": null,
+    "weaknesses": []
   }
 ]
\ No newline at end of file