diff --git a/src/backend.rs b/src/backend.rs
index 1909aae..1546fd6 100644
--- a/src/backend.rs
+++ b/src/backend.rs
@@ -36,16 +36,20 @@ pub unsafe trait Backend<T> {
     fn get_int(s: Self::Stored) -> Self;
 }
 
-#[allow(dead_code)] // :/
-const fn assert_same_size<A, B>() {
-    let has_equal_size = mem::size_of::<A>() == mem::size_of::<B>();
-    assert!(has_equal_size);
-}
+#[cfg(test)] // todo: this mustn't affect the msrv, fix this later
+mod backend_size_asserts {
 
-#[cfg(not(target_pointer_width = "16"))]
-const _: () = assert_same_size::<u128, <u128 as Backend<()>>::Stored>();
-const _: () = assert_same_size::<u64, <u64 as Backend<()>>::Stored>();
-const _: () = assert_same_size::<usize, <usize as Backend<()>>::Stored>();
+    #[allow(dead_code)] // :/
+    const fn assert_same_size<A, B>() {
+        let has_equal_size = mem::size_of::<A>() == mem::size_of::<B>();
+        assert!(has_equal_size);
+    }
+
+    #[cfg(not(target_pointer_width = "16"))]
+    const _: () = assert_same_size::<u128, <u128 as Backend<()>>::Stored>();
+    const _: () = assert_same_size::<u64, <u64 as Backend<()>>::Stored>();
+    const _: () = assert_same_size::<usize, <usize as Backend<()>>::Stored>();
+}
 
 unsafe impl<T> Backend<T> for usize {
     type Stored = *mut T;
diff --git a/src/lib.rs b/src/lib.rs
index 55da9c9..04d7fe9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -89,9 +89,9 @@ extern crate alloc; // we want that for tests so we can use `Box`
 mod backend;
 mod strategy;
 
-use core::hash::{Hash, Hasher};
 use core::{
     fmt::{Debug, Formatter},
+    hash::{Hash, Hasher},
     marker::PhantomData,
     mem,
     ops::Not,