diff --git a/karapace/in_memory_database.py b/karapace/in_memory_database.py
index 01e0153c1..772ba0a93 100644
--- a/karapace/in_memory_database.py
+++ b/karapace/in_memory_database.py
@@ -150,6 +150,8 @@ def insert_schema_version(
                 )
 
     def insert_subject(self, *, subject: Subject) -> None:
+        if subject is None:
+            print("Subject is none, coverage test")
         self.subjects.setdefault(subject, SubjectData())
 
     def get_subject_compatibility(self, *, subject: Subject) -> str | None:
diff --git a/karapace/schema_registry_apis.py b/karapace/schema_registry_apis.py
index 4ef7b884a..de2fea9db 100644
--- a/karapace/schema_registry_apis.py
+++ b/karapace/schema_registry_apis.py
@@ -1205,6 +1205,9 @@ async def subject_post(
     ) -> None:
         self._check_authorization(user, Operation.Write, f"Subject:{subject}")
 
+        if subject is None:
+            print("Subject is none, coverage test")
+
         body = request.json
         self.log.debug("POST with subject: %r, request: %r", subject, body)
         self._validate_subject(content_type, subject)