diff --git a/crates/pallet-subspace/src/mock.rs b/crates/pallet-subspace/src/mock.rs
index 5a498ba642c..10203862e14 100644
--- a/crates/pallet-subspace/src/mock.rs
+++ b/crates/pallet-subspace/src/mock.rs
@@ -233,7 +233,7 @@ pub fn make_pre_digest(
 pub fn new_test_ext() -> sp_io::TestExternalities {
     static INITIALIZE_LOGGER: Once = Once::new();
     INITIALIZE_LOGGER.call_once(|| {
-        env_logger::init_from_env(env_logger::Env::new().default_filter_or("error"));
+        let _ = env_logger::try_init_from_env(env_logger::Env::new().default_filter_or("error"));
     });
 
     let mut t = frame_system::GenesisConfig::default()
diff --git a/domains/client/block-builder/src/lib.rs b/domains/client/block-builder/src/lib.rs
index 9c3be87e90a..d8d5a54917d 100644
--- a/domains/client/block-builder/src/lib.rs
+++ b/domains/client/block-builder/src/lib.rs
@@ -355,9 +355,8 @@ mod tests {
 
     #[test]
     fn block_building_storage_proof_does_not_include_runtime_by_default() {
-        let builder = substrate_test_runtime_client::TestClientBuilder::new();
-        let backend = builder.backend();
-        let client = builder.build();
+        let (client, backend) =
+            substrate_test_runtime_client::TestClientBuilder::new().build_with_backend();
 
         let block = BlockBuilder::new(
             &client,
diff --git a/domains/test/service/src/lib.rs b/domains/test/service/src/lib.rs
index 6900ace29ee..541490cba39 100644
--- a/domains/test/service/src/lib.rs
+++ b/domains/test/service/src/lib.rs
@@ -29,7 +29,7 @@ use sc_network::{multiaddr, NetworkService, NetworkStateInfo};
 use sc_network_common::config::{NonReservedPeerMode, TransportConfig};
 use sc_service::config::{
     DatabaseSource, KeystoreConfig, MultiaddrWithPeerId, NetworkConfiguration,
-    OffchainWorkerConfig, PruningMode, WasmExecutionMethod,
+    OffchainWorkerConfig, PruningMode, WasmExecutionMethod, WasmtimeInstantiationStrategy,
 };
 use sc_service::{
     BasePath, BlocksPruning, Configuration as ServiceConfiguration, Error as ServiceError,
@@ -466,7 +466,9 @@ pub fn node_config(
         state_pruning: Some(PruningMode::ArchiveAll),
         blocks_pruning: BlocksPruning::KeepAll,
         chain_spec: spec,
-        wasm_method: WasmExecutionMethod::Interpreted,
+        wasm_method: WasmExecutionMethod::Compiled {
+            instantiation_strategy: WasmtimeInstantiationStrategy::PoolingCopyOnWrite,
+        },
         // NOTE: we enforce the use of the native runtime to make the errors more debuggable
         execution_strategies: ExecutionStrategies {
             syncing: sc_client_api::ExecutionStrategy::NativeWhenPossible,
diff --git a/substrate/substrate-test-runtime-client/src/lib.rs b/substrate/substrate-test-runtime-client/src/lib.rs
index a61275a55e9..a8d60ee0aa8 100644
--- a/substrate/substrate-test-runtime-client/src/lib.rs
+++ b/substrate/substrate-test-runtime-client/src/lib.rs
@@ -260,24 +260,27 @@ impl<B> TestClientBuilderExt<B>
 	fn build_with_longest_chain(
 		self,
 	) -> (Client<B>, sc_consensus::LongestChain<B, substrate_test_runtime::Block>) {
-		self.build_with_native_executor(None)
+		self.build_with_native_executor(Some(new_native_executor()))
 	}
 
 	fn build_with_backend(self) -> (Client<B>, Arc<B>) {
 		let backend = self.backend();
-		(self.build_with_native_executor(None).0, backend)
+		(self.build_with_native_executor(Some(new_native_executor())).0, backend)
 	}
 }
 
 /// Creates new client instance used for tests.
 pub fn new() -> Client<Backend> {
-	TestClientBuilder::new().build()
+	let (client, _) = TestClientBuilder::new().build_with_native_executor(Some(new_native_executor()));
+	client
 }
 
 /// Create a new native executor.
 pub fn new_native_executor() -> sc_executor::NativeElseWasmExecutor<LocalExecutorDispatch> {
 	sc_executor::NativeElseWasmExecutor::new(
-		sc_executor::WasmExecutionMethod::Interpreted,
+		sc_executor::WasmExecutionMethod::Compiled {
+			instantiation_strategy: sc_executor::WasmtimeInstantiationStrategy::PoolingCopyOnWrite,
+		},
 		None,
 		8,
 		2,
diff --git a/substrate/substrate-test-runtime/src/system.rs b/substrate/substrate-test-runtime/src/system.rs
index b3d0ace9bf6..b24105209a8 100644
--- a/substrate/substrate-test-runtime/src/system.rs
+++ b/substrate/substrate-test-runtime/src/system.rs
@@ -313,7 +313,7 @@ mod tests {
 	use super::*;
 
 	use crate::{wasm_binary_unwrap, Header, Transfer};
-	use sc_executor::{NativeElseWasmExecutor, WasmExecutionMethod};
+	use sc_executor::{NativeElseWasmExecutor, WasmExecutionMethod, WasmtimeInstantiationStrategy};
 	use sp_core::{
 		map,
 		traits::{CallContext, CodeExecutor, RuntimeCode},
@@ -337,7 +337,14 @@ mod tests {
 	}
 
 	fn executor() -> NativeElseWasmExecutor<NativeDispatch> {
-		NativeElseWasmExecutor::new(WasmExecutionMethod::Interpreted, None, 8, 2)
+		NativeElseWasmExecutor::new(
+			WasmExecutionMethod::Compiled {
+				instantiation_strategy: WasmtimeInstantiationStrategy::PoolingCopyOnWrite,
+			},
+			None,
+			8,
+			2,
+		)
 	}
 
 	fn new_test_ext() -> TestExternalities {
diff --git a/test/subspace-test-service/src/lib.rs b/test/subspace-test-service/src/lib.rs
index 87f875d163e..1d3dcb345f4 100644
--- a/test/subspace-test-service/src/lib.rs
+++ b/test/subspace-test-service/src/lib.rs
@@ -27,6 +27,7 @@ use sc_network::{multiaddr, NetworkStateInfo};
 use sc_network_common::config::TransportConfig;
 use sc_service::config::{
     DatabaseSource, KeystoreConfig, MultiaddrWithPeerId, WasmExecutionMethod,
+    WasmtimeInstantiationStrategy,
 };
 use sc_service::{
     BasePath, BlocksPruning, Configuration, NetworkStarter, Role, RpcHandlers, TaskManager,
@@ -113,7 +114,9 @@ pub fn node_config(
         state_pruning: Default::default(),
         blocks_pruning: BlocksPruning::KeepAll,
         chain_spec: Box::new(spec),
-        wasm_method: WasmExecutionMethod::Interpreted,
+        wasm_method: WasmExecutionMethod::Compiled {
+            instantiation_strategy: WasmtimeInstantiationStrategy::PoolingCopyOnWrite,
+        },
         wasm_runtime_overrides: Default::default(),
         // NOTE: we enforce the use of the native runtime to make the errors more debuggable
         execution_strategies: ExecutionStrategies {