diff --git a/crates/db/tests/fields.rs b/crates/db/tests/fields.rs
index d8a787b..0597979 100644
--- a/crates/db/tests/fields.rs
+++ b/crates/db/tests/fields.rs
@@ -116,3 +116,56 @@ async fn term_and_authority_fields_round_trip_their_binding(pool: PgPool) {
     let all = fields::list_field_definitions(db.pool()).await.unwrap();
     assert_eq!(all.len(), 2);
 }
+
+#[sqlx::test]
+async fn any_authority_scalar_and_zero_labels_round_trip(pool: PgPool) {
+    let db = Db::from_pool(pool);
+
+    let mut tx = db.pool().begin().await.unwrap();
+    fields::create_field_definition(
+        &mut tx,
+        &NewFieldDefinition {
+            key: "donor".into(),
+            field_type: FieldType::Authority { kind: None },
+            required: false,
+            group_key: None,
+            labels: vec![],
+        },
+    )
+    .await
+    .unwrap();
+    fields::create_field_definition(
+        &mut tx,
+        &NewFieldDefinition {
+            key: "on_display".into(),
+            field_type: FieldType::Boolean,
+            required: false,
+            group_key: None,
+            labels: vec![LocalizedLabel {
+                lang: "en".into(),
+                label: "on display".into(),
+            }],
+        },
+    )
+    .await
+    .unwrap();
+    tx.commit().await.unwrap();
+
+    let donor = fields::field_definition_by_key(db.pool(), "donor")
+        .await
+        .unwrap()
+        .unwrap();
+    assert_eq!(donor.field_type, FieldType::Authority { kind: None });
+    assert!(donor.labels.is_empty());
+
+    let on_display = fields::field_definition_by_key(db.pool(), "on_display")
+        .await
+        .unwrap()
+        .unwrap();
+    assert_eq!(on_display.field_type, FieldType::Boolean);
+
+    // list_field_definitions is ordered by key.
+    let all = fields::list_field_definitions(db.pool()).await.unwrap();
+    let keys: Vec<&str> = all.iter().map(|d| d.key.as_str()).collect();
+    assert_eq!(keys, vec!["donor", "on_display"]);
+}