diff --git a/libs/pageserver_api/src/models.rs b/libs/pageserver_api/src/models.rs
index 27693ee275436..baf4f159d6ee0 100644
--- a/libs/pageserver_api/src/models.rs
+++ b/libs/pageserver_api/src/models.rs
@@ -1669,6 +1669,9 @@ mod tests {
     fn test_aux_parse() {
         assert_eq!(AuxFilePolicy::from_str("V2").unwrap(), AuxFilePolicy::V2);
         assert_eq!(AuxFilePolicy::from_str("v2").unwrap(), AuxFilePolicy::V2);
-        assert_eq!(AuxFilePolicy::from_str("cross-validation").unwrap(), AuxFilePolicy::CrossValidation);
+        assert_eq!(
+            AuxFilePolicy::from_str("cross-validation").unwrap(),
+            AuxFilePolicy::CrossValidation
+        );
     }
 }
diff --git a/test_runner/fixtures/neon_fixtures.py b/test_runner/fixtures/neon_fixtures.py
index b02054a702d6e..796ae7217b022 100644
--- a/test_runner/fixtures/neon_fixtures.py
+++ b/test_runner/fixtures/neon_fixtures.py
@@ -1625,7 +1625,7 @@ def create_tenant(
             args.extend(["-c", "switch_aux_file_policy:v1"])
 
         if aux_file_v2 is AuxFileStore.CrossValidation:
-            args.extend(["-c", "switch_aux_file_policy:cross_validation"])
+            args.extend(["-c", "switch_aux_file_policy:cross-validation"])
 
         if set_default:
             args.append("--set-default")