diff --git a/README.md b/README.md
index 599e4b8..60fc410 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ This crate uses Rust's const generics to allow creation of integers of arbitrary
 
 - **Zero dependencies by default**: `bnum` does not depend on any other crates by default. Support for crates such as [`rand`](https://docs.rs/rand/latest/rand/) and [`serde`](https://docs.rs/serde/latest/serde/) can be enabled with crate [features](#features).
 - **`no-std` compatible**: `bnum` can be used in `no_std` environments, provided that the [`arbitrary`](#fuzzing) and [`quickcheck`](#quickcheck) features are not enabled.
-- **Compile-time integer parsing**: the `from_str_radix` and `parse_str_radix` methods on `bnum` integers are `const`, which allows parsing of integers from string slices at compile time. Note that this is more powerful than compile-time parsing of integer literals. This is because it allows parsing of strings in all radices from `2` to `36` inclusive instead of just `2`, `8`, `10` and `16`. Additionally, the string to be parsed does not have to be a literal: it could, for example, be obtained via [`include_str!`](https://doc.rust-lang.org/core/macro.include_str.html), or [`env!`](https://doc.rust-lang.org/core/macro.env.html)`.
+- **Compile-time integer parsing**: the `from_str_radix` and `parse_str_radix` methods on `bnum` integers are `const`, which allows parsing of integers from string slices at compile time. Note that this is more powerful than compile-time parsing of integer literals. This is because it allows parsing of strings in all radices from `2` to `36` inclusive instead of just `2`, `8`, `10` and `16`. Additionally, the string to be parsed does not have to be a literal: it could, for example, be obtained via [`include_str!`](https://doc.rust-lang.org/core/macro.include_str.html), or [`env!`](https://doc.rust-lang.org/core/macro.env.html).
 - **`const` evaluation**: nearly all methods defined on `bnum` integers are `const`, which allows complex compile-time calculations.
 
 ## Installation
diff --git a/src/buint/as_float.rs b/src/buint/as_float.rs
index d81a4da..3261564 100644
--- a/src/buint/as_float.rs
+++ b/src/buint/as_float.rs
@@ -144,7 +144,7 @@ pub trait Mantissa {
     fn add(self, rhs: Self) -> Self;
     fn sub(self, rhs: Self) -> Self;
     fn leading_zeros(self) -> ExpType;
-    fn bitand(self, rhs: Self) -> Self;
+    // fn bitand(self, rhs: Self) -> Self;
     fn gt(&self, rhs: &Self) -> bool;
 }
 
@@ -188,10 +188,10 @@ macro_rules! impl_mantissa_for_uint {
                         Self::leading_zeros(self) as ExpType
                     }
 
-                    #[inline]
-                    fn bitand(self, rhs: Self) -> Self {
-                        self & rhs
-                    }
+                    // #[inline]
+                    // fn bitand(self, rhs: Self) -> Self {
+                    //     self & rhs
+                    // }
 
                     #[inline]
                     fn gt(&self, rhs: &Self) -> bool {
diff --git a/src/buint/endian.rs b/src/buint/endian.rs
index e484b7f..532f847 100644
--- a/src/buint/endian.rs
+++ b/src/buint/endian.rs
@@ -233,7 +233,7 @@ macro_rules! endian {
             #[inline]
             pub const fn from_be_bytes(bytes: [u8; N * digit::$Digit::BYTES as usize]) -> Self {
                 let mut out = Self::ZERO;
-                let arr_ptr = bytes.as_ptr();
+                // let arr_ptr = bytes.as_ptr();
                 let mut i = 0;
                 while i < N {
                     let mut digit_bytes = [0u8; digit::$Digit::BYTES as usize];
@@ -256,7 +256,7 @@ macro_rules! endian {
             #[inline]
             pub const fn from_le_bytes(bytes: [u8; N * digit::$Digit::BYTES as usize]) -> Self {
                 let mut out = Self::ZERO;
-                let arr_ptr = bytes.as_ptr();
+                // let arr_ptr = bytes.as_ptr();
                 let mut i = 0;
                 while i < N {
                     let mut digit_bytes = [0u8; digit::$Digit::BYTES as usize];
diff --git a/src/cast.rs b/src/cast.rs
index f4ace6c..74b9a46 100644
--- a/src/cast.rs
+++ b/src/cast.rs
@@ -8,6 +8,7 @@ pub trait CastFrom<T> {
 }
 
 // #[cfg_attr(feature = "nightly", const_trait)]
+#[cfg(test)]
 pub(crate) trait CastTo<U> {
     fn cast_to(self) -> U;
 }
@@ -55,6 +56,7 @@ assert_eq!(b, f.as_());
 macro_rules! as_trait {
     () => {
         // impl<T, U> const CastTo<U> for T
+        #[cfg(test)]
         impl<T, U> CastTo<U> for T
         where
             // U: ~const CastFrom<T>,
@@ -93,6 +95,7 @@ macro_rules! as_trait {
 #[cfg(not(feature = "nightly"))]
 macro_rules! as_trait {
     () => {
+        #[cfg(test)]
         impl<T, U> CastTo<U> for T
         where
             U: CastFrom<T>,