diff --git a/foundry/test/assets/calldata.txt b/foundry/test/assets/calldata.txt
index 3aecf03..f8bca01 100644
--- a/foundry/test/assets/calldata.txt
+++ b/foundry/test/assets/calldata.txt
@@ -33,3 +33,4 @@ test_encode_balancer_v3:7bc3485026ac48b6cf9baf0a377477fff5703af8c71ea051a5f82c67
 test_single_encoding_strategy_balancer_v3: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
 test_uniswap_v3_balancer_v3: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
 test_single_swap_strategy_encoder: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
+test_sequential_swap_unix: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
diff --git a/tests/uniswap_x_integration_tests.rs b/tests/uniswap_x_integration_tests.rs
new file mode 100644
index 0000000..b55bb90
--- /dev/null
+++ b/tests/uniswap_x_integration_tests.rs
@@ -0,0 +1,117 @@
+use std::{collections::HashMap, str::FromStr};
+
+use alloy::{hex::encode, primitives::Address, sol_types::SolValue};
+use num_bigint::{BigInt, BigUint};
+use tycho_common::{models::protocol::ProtocolComponent, Bytes};
+use tycho_execution::encoding::{
+    evm::{
+        approvals::protocol_approvals_manager::ProtocolApprovalsManager,
+        utils::{bytes_to_address, write_calldata_to_file},
+    },
+    models::{Solution, Swap, UserTransferType},
+};
+
+use crate::common::{
+    encoding::encode_tycho_router_call, eth, eth_chain, get_tycho_router_encoder, router_address,
+    usdc, wbtc, weth,
+};
+
+mod common;
+
+#[test]
+fn test_sequential_swap_unix() {
+    // Performs a sequential swap from WETH to USDC though WBTC using USV3 and USV2
+    // pools
+    //
+    //   WETH ───(USV3)──> WBTC ───(USV2)──> USDC
+    // Creates all the calldata needed for the uniswap X callbackData
+
+    let filler = Bytes::from_str("0xcd09f75E2BF2A4d11F3AB23f1389FcC1621c0cc2").unwrap();
+    let unix_reactor = Address::from_str("0x00000011F84B9aa48e5f8aA8B9897600006289Be").unwrap();
+
+    let weth = weth();
+    let wbtc = wbtc();
+    let usdc = usdc();
+
+    let swap_weth_wbtc = Swap {
+        component: ProtocolComponent {
+            id: "0xCBCdF9626bC03E24f779434178A73a0B4bad62eD".to_string(),
+            protocol_system: "uniswap_v3".to_string(),
+            static_attributes: {
+                let mut attrs = HashMap::new();
+                attrs.insert(
+                    "fee".to_string(),
+                    Bytes::from(BigInt::from(3000).to_signed_bytes_be()),
+                );
+                attrs
+            },
+            ..Default::default()
+        },
+        token_in: weth.clone(),
+        token_out: wbtc.clone(),
+        split: 0f64,
+        user_data: None,
+    };
+    let swap_wbtc_usdc = Swap {
+        component: ProtocolComponent {
+            id: "0x004375Dff511095CC5A197A54140a24eFEF3A416".to_string(),
+            protocol_system: "uniswap_v2".to_string(),
+            ..Default::default()
+        },
+        token_in: wbtc.clone(),
+        token_out: usdc.clone(),
+        split: 0f64,
+        user_data: None,
+    };
+    let encoder = get_tycho_router_encoder(UserTransferType::TransferFrom);
+
+    let solution = Solution {
+        exact_out: false,
+        given_token: weth.clone(),
+        given_amount: BigUint::from_str("1_000000000000000000").unwrap(),
+        checked_token: usdc.clone(),
+        checked_amount: BigUint::from_str("26173932").unwrap(),
+        sender: filler.clone(),
+        receiver: filler.clone(),
+        swaps: vec![swap_weth_wbtc, swap_wbtc_usdc],
+        ..Default::default()
+    };
+
+    let encoded_solution = encoder
+        .encode_solutions(vec![solution.clone()])
+        .unwrap()[0]
+        .clone();
+
+    let tycho_calldata = encode_tycho_router_call(
+        eth_chain().id,
+        encoded_solution,
+        &solution,
+        &UserTransferType::TransferFrom,
+        &eth(),
+        None,
+    )
+    .unwrap()
+    .data;
+
+    // Uniswap X specific part
+    let filler_address = bytes_to_address(&filler).unwrap();
+    let token_approvals_manager = ProtocolApprovalsManager::new().unwrap();
+
+    let token_in_approval_needed = token_approvals_manager
+        .approval_needed(
+            bytes_to_address(&weth).unwrap(),
+            filler_address,
+            bytes_to_address(&router_address()).unwrap(),
+        )
+        .unwrap();
+
+    let token_out_approval_needed = token_approvals_manager
+        .approval_needed(bytes_to_address(&usdc).unwrap(), filler_address, unix_reactor)
+        .unwrap();
+
+    let full_calldata =
+        (token_in_approval_needed, token_out_approval_needed, tycho_calldata).abi_encode_packed();
+
+    let hex_calldata = encode(&full_calldata);
+    write_calldata_to_file("test_sequential_swap_unix", hex_calldata.as_str());
+}