diff --git a/core/src/utils/mod.rs b/core/src/utils/mod.rs
index c04aafcdb0..006864dd64 100644
--- a/core/src/utils/mod.rs
+++ b/core/src/utils/mod.rs
@@ -4,6 +4,12 @@
 
 //! Miscellaneous utility helpers.
 
+use crate::prelude::*;
+use borrow::ToOwned;
+use codec::{Compact, Decode, Encode};
+use derivative::Derivative;
+use vec::Vec;
+
 mod account_id;
 pub mod bits;
 mod era;
@@ -13,17 +19,12 @@ mod static_type;
 mod unchecked_extrinsic;
 mod wrapper_opaque;
 
-use codec::{Compact, Decode, Encode};
-use derivative::Derivative;
-
 pub use account_id::AccountId32;
-use borrow::ToOwned;
 pub use era::Era;
 pub use multi_address::MultiAddress;
 pub use multi_signature::MultiSignature;
 pub use static_type::Static;
 pub use unchecked_extrinsic::UncheckedExtrinsic;
-use vec::Vec;
 pub use wrapper_opaque::WrapperKeepOpaque;
 
 // Used in codegen
@@ -49,8 +50,6 @@ pub(crate) fn strip_compact_prefix(bytes: &[u8]) -> Result<(u64, &[u8]), codec::
     Ok((val.0, *cursor))
 }
 
-use crate::prelude::*;
-
 /// A version of [`core::marker::PhantomData`] that is also Send and Sync (which is fine
 /// because regardless of the generic param, it is always possible to Send + Sync this
 /// 0 size type).
diff --git a/subxt/Cargo.toml b/subxt/Cargo.toml
index 6f6b664a0f..b53cf79f0b 100644
--- a/subxt/Cargo.toml
+++ b/subxt/Cargo.toml
@@ -51,11 +51,11 @@ unstable-light-client = ["subxt-lightclient", "tokio-stream"]
 [dependencies]
 async-trait = { workspace = true }
 codec = { package = "parity-scale-codec", workspace = true, features = ["derive"] }
-scale-info = { workspace = true }
-scale-value = { workspace = true }
-scale-bits = { workspace = true }
-scale-decode = { workspace = true }
-scale-encode = { workspace = true }
+scale-info = { workspace = true, features = ["default"] }
+scale-value = { workspace = true, features = ["default"] }
+scale-bits = { workspace = true, features = ["default"] }
+scale-decode = { workspace = true, features = ["default"] }
+scale-encode = { workspace = true, features = ["default"] }
 futures = { workspace = true }
 hex = { workspace = true }
 serde = { workspace = true, features = ["derive"] }
@@ -69,7 +69,7 @@ instant = { workspace = true }
 
 # Provides some deserialization, types like U256/H256 and hashing impls like twox/blake256:
 impl-serde = { workspace = true }
-primitive-types = { workspace = true }
+primitive-types = { workspace = true, features = ["codec", "scale-info", "serde"] }
 sp-core-hashing = { workspace = true }
 
 # For ss58 encoding AccountId32 to serialize them properly:
diff --git a/testing/no-std-tests/src/main.rs b/testing/no-std-tests/src/main.rs
index 2ca5d22f5e..65f425028f 100644
--- a/testing/no-std-tests/src/main.rs
+++ b/testing/no-std-tests/src/main.rs
@@ -49,6 +49,5 @@ fn subxt_metadata_test() {
 }
 
 fn subxt_core_test() {
-    // let er
-    // assert!(subxt_core::utils::url_is_secure(url).unwrap());
+    let era = subxt_core::utils::era::Era::Immortal;
 }