diff --git a/validation/src/check.rs b/validation/src/check.rs
index 402cce2..ad74463 100644
--- a/validation/src/check.rs
+++ b/validation/src/check.rs
@@ -262,7 +262,7 @@ pub struct MapInfoOwned{
 pub struct MapCheck<'a>{
 	// === METADATA CHECKS ===
 	// The root must be of class Model
-	model_class:StringCheck<'a,(),&'a str>,
+	model_class:StringCheck<'a,(),&'static str>,
 	// Model's name must be in snake case
 	model_name:StringCheck<'a,(),String>,
 	// Map must have a StringValue named DisplayName.
@@ -470,18 +470,16 @@ impl<'a> std::fmt::Display for MapCheck<'a>{
 		}
 		if let DuplicateCheck(Err(DuplicateCheckContext(context)))=&self.spawn_counts{
 			write!(f,"Duplicate spawn zones: ")?;
-			comma_separated(f,context.iter(),|f,(SpawnID(spawn_id),count)|{
-				write!(f,"Spawn{spawn_id}({count} duplicates)")?;
-				Ok(())
-			})?;
+			comma_separated(f,context.iter(),|f,(SpawnID(spawn_id),count)|
+				write!(f,"Spawn{spawn_id}({count} duplicates)")
+			)?;
 			writeln!(f,"")?;
 		}
 		if let DuplicateCheck(Err(DuplicateCheckContext(context)))=&self.wormhole_out_counts{
 			write!(f,"Duplicate wormhole out: ")?;
-			comma_separated(f,context.iter(),|f,(WormholeOutID(wormhole_out_id),count)|{
-				write!(f,"WormholeOut{wormhole_out_id}({count} duplicates)")?;
-				Ok(())
-			})?;
+			comma_separated(f,context.iter(),|f,(WormholeOutID(wormhole_out_id),count)|
+				write!(f,"WormholeOut{wormhole_out_id}({count} duplicates)")
+			)?;
 			writeln!(f,"")?;
 		}
 		Ok(())