diff --git a/subxt/src/lib.rs b/subxt/src/lib.rs
index 723a363a1f..5842f513e9 100644
--- a/subxt/src/lib.rs
+++ b/subxt/src/lib.rs
@@ -65,9 +65,7 @@ pub use crate::{
     error::Error,
 };
 
-// pub use subxt_core::config;
-// pub use subxt_core::config::{Config, PolkadotConfig, SubstrateConfig};
-// pub use subxt_core::dynamic;
+// We replace this by proper exports, once the API of subxt_core is aggreed upon.
 pub use subxt_core::*;
 
 /// Re-export external crates that are made use of in the subxt API.
diff --git a/testing/no-std-tests/Cargo.lock b/testing/no-std-tests/Cargo.lock
index ef41c29755..9f7dd11516 100644
--- a/testing/no-std-tests/Cargo.lock
+++ b/testing/no-std-tests/Cargo.lock
@@ -878,6 +878,7 @@ version = "0.0.0"
 dependencies = [
  "libc_alloc",
  "parity-scale-codec",
+ "subxt-core",
  "subxt-metadata",
  "subxt-signer",
 ]
diff --git a/testing/no-std-tests/Cargo.toml b/testing/no-std-tests/Cargo.toml
index 8d021bd817..b336627c8f 100644
--- a/testing/no-std-tests/Cargo.toml
+++ b/testing/no-std-tests/Cargo.toml
@@ -8,7 +8,7 @@ resolver = "2"
 [dependencies]
 subxt-metadata = { path = "../../metadata", default-features = false }
 subxt-signer = { path = "../../signer", default-features = false, features = ["sr25519", "ecdsa", "subxt"] }
-# subxt-core = { path = "../../core", default-features = false }
+subxt-core = { path = "../../core", default-features = false }
 codec = { package = "parity-scale-codec", version = "3.6.9", default-features = false, features = ["derive"] }
 libc_alloc = { version = "1.0.6" }
 
diff --git a/testing/no-std-tests/src/main.rs b/testing/no-std-tests/src/main.rs
index 4f5b1b377c..fac3807ba3 100644
--- a/testing/no-std-tests/src/main.rs
+++ b/testing/no-std-tests/src/main.rs
@@ -58,5 +58,5 @@ fn test() {
     // subxt-core
     // /////////////////////////////////////////////////////////////////////////////
 
-    // let _era = subxt_core::utils::Era::Immortal;
+    let _era = subxt_core::utils::Era::Immortal;
 }