diff --git a/src/env/test/customization.rs b/src/env/test/customization.rs
index a926c01..8180e68 100644
--- a/src/env/test/customization.rs
+++ b/src/env/test/customization.rs
@@ -87,11 +87,14 @@ mod test {
     use crate::api::customization::{is_valid, DEFAULT_CUSTOMIZATION};
 
     #[test]
-    #[allow(clippy::assertions_on_constants)]
     fn test_invariants() {
-        let mut customization = TestCustomization::from(DEFAULT_CUSTOMIZATION.clone());
+        let customization = TestCustomization::from(DEFAULT_CUSTOMIZATION.clone());
         assert!(is_valid(&customization));
+    }
 
+    #[test]
+    fn test_vec_storage_impl() {
+        let mut customization = TestCustomization::from(DEFAULT_CUSTOMIZATION.clone());
         assert!(customization.default_min_pin_length_rp_ids().is_empty());
         customization
             .set_default_min_pin_length_rp_ids(vec!["abc.com".to_owned(), "def.com".to_owned()]);