diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index b8d50be..b9a4b91 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -51,26 +51,12 @@ jobs:
           path: |
             ./contracts/*.wasm 
             ./contracts/*.contract
-  build-test-runner:
-    runs-on: ubuntu-22.04
-    steps:
-      - name: get jq
-        run: |
-          sudo apt-get update
-          sudo apt-get install jq -y
-      - name: build runner
-        run: cp "$(cargo test --no-run --message-format=json | jq -r "select(.profile.test == true) | .filenames[]")" ./test-binary
-        working-directory: subxt-tests
-      - uses: actions/upload-artifact@v3
-        with:
-          name: test-runner
-          path: ./subxt-tests/test-binary
   integration-tests-generic-clients:
     runs-on: ubuntu-22.04
     needs:
       - build-solidity
       - build-ink
-      - build-test-runner
+      # - build-test-runner
     steps:
       - uses: actions/checkout@v3
       - name: Login to GAR
@@ -87,21 +73,16 @@ jobs:
         with:
           name: ink
           path: ./contracts/
-      - uses: actions/download-artifact@v3
-        with:
-          name: test-runner
-          path: ./subxt-tests/test-binary
       - name: start laguna-chain:devnet
-        run: docker run -d -p 9944:9944 us-docker.pkg.dev/laguna-chain/laguna-chain/laguna-chain:0.1.2_evm_compat --dev --ws-external
+        run: docker run -d -p 9944:9944 us-docker.pkg.dev/laguna-chain/laguna-chain/laguna-chain:0.1.4 --dev --ws-external
       - name: Run tests
-        run: ./test-binary generic_client --test-threads=1
+        run: cargo test generic_client -- --test-threads=1
         working-directory: subxt-tests
   integration-tests-eth-clients:
     runs-on: ubuntu-22.04
     needs:
       - build-solidity
       - build-ink
-      - build-test-runner
     steps:
       - uses: actions/checkout@v3
       - name: Login to GAR
@@ -118,12 +99,8 @@ jobs:
         with:
           name: ink
           path: ./contracts/
-      - uses: actions/download-artifact@v3
-        with:
-          name: test-runner
-          path: ./subxt-tests/test-binary
       - name: start laguna-chain:devnet
-        run: docker run -d -p 9944:9944 us-docker.pkg.dev/laguna-chain/laguna-chain/laguna-chain:0.1.2_evm_compat --dev --ws-external
+        run: docker run -d -p 9944:9944 us-docker.pkg.dev/laguna-chain/laguna-chain/laguna-chain:0.1.4 --dev --ws-external
       - name: Run tests
-        run: ./test-binary eth_client --test-threads=1
+        run: cargo test eth_client -- --test-threads=1
         working-directory: subxt-tests
diff --git a/subxt-tests/laguna-dev.scale b/subxt-tests/laguna-dev.scale
deleted file mode 100644
index 8ccec0b..0000000
Binary files a/subxt-tests/laguna-dev.scale and /dev/null differ
diff --git a/subxt-tests/laguna.scale b/subxt-tests/laguna.scale
index 8ccec0b..c412b92 100644
Binary files a/subxt-tests/laguna.scale and b/subxt-tests/laguna.scale differ
diff --git a/subxt-tests/src/eth_client/cases/issue666.rs b/subxt-tests/src/eth_client/cases/issue666.rs
index f577fca..d8e14c8 100644
--- a/subxt-tests/src/eth_client/cases/issue666.rs
+++ b/subxt-tests/src/eth_client/cases/issue666.rs
@@ -48,17 +48,17 @@ async fn case() -> anyhow::Result<()> {
             .await?;
     }
 
+    let nonce = eth_client_wrapper
+        .get_transaction_counts(eth_alice, None)
+        .await?;
+
     let mut create_payload = TxWrapper::<LegacyTransactionMessage>::create(
         0_u32.into(),
         code.into(),
         selector.into(),
-        Bytes::from(vec![]),
+        Bytes::from(vec![nonce.as_u128() as u8]),
     );
 
-    let nonce = eth_client_wrapper
-        .get_transaction_counts(eth_alice, None)
-        .await?;
-
     create_payload.chain_id.replace(1000);
     create_payload.nonce = nonce;
     create_payload.gas_limit = U256::from(10_u32).pow(18_u32.into());
@@ -71,5 +71,7 @@ async fn case() -> anyhow::Result<()> {
 
     let tx_id = eth_client_wrapper.send_raw_transaction(raw.into()).await?;
 
+    dbg!(tx_id);
+
     Ok(())
 }