diff --git a/src/srctools/_engine_db.py b/src/srctools/_engine_db.py
index 1c33cbdc..ca40272f 100644
--- a/src/srctools/_engine_db.py
+++ b/src/srctools/_engine_db.py
@@ -602,7 +602,8 @@ def record_strings(string: str) -> bytes:
             ent_serialise(ent, dummy_file, record_strings)
             ent_to_size[ent] = dummy_file.tell()
 
-    assert ent is not None and ent.classname.casefold() == '_cbaseentity_', ent
+    assert ent is not None
+    assert ent.classname.casefold() == '_cbaseentity_', ent
     base_strings = ent_to_string[ent]
     print(f'{SHARED_STRINGS-len(base_strings)}/{SHARED_STRINGS} shared strings used.')