diff --git a/tests/tests.json b/tests/tests.json
index 528fe1e..4ac31db 100644
--- a/tests/tests.json
+++ b/tests/tests.json
@@ -52,7 +52,7 @@
             {"family":"Altman", "given":"D G"},
             {"family":"Bland", "given":"J M"}
         ],
-        "issued":1995
+        "issued":1995,
         "container-title":"British Medical Journal",
         "volume":311,
         "page":"485",