diff --git a/Cargo.lock b/Cargo.lock
index af017f8..40495b6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1227,6 +1227,12 @@ dependencies = [
  "cpufeatures",
 ]
 
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
 [[package]]
 name = "libc"
 version = "0.2.152"
@@ -1269,6 +1275,7 @@ name = "macro_utils"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "lazy_static",
  "quote",
  "serde",
  "serde_json",
diff --git a/macro/src/lib.rs b/macro/src/lib.rs
index e8ed70f..fc87d23 100644
--- a/macro/src/lib.rs
+++ b/macro/src/lib.rs
@@ -1,4 +1,4 @@
-use macro_utils::{extract_expr_to_str, extract_expr_to_u64, get_rpc_data, RpcData};
+use macro_utils::{extract_expr_to_str, extract_expr_to_u64, RpcData, RPC_DATA};
 use proc_macro::TokenStream;
 use quote::{quote, ToTokens};
 use syn::{
@@ -46,14 +46,18 @@ impl Parse for MacroDataRequire {
             match arg.path.get_ident() {
                 Some(ident) => match ident.to_string().as_str() {
                     "block_min" => {
-                        parsed_params.block_min = extract_expr_to_u64(arg.value).unwrap_or(0);
+                        parsed_params.block_min = match extract_expr_to_str(&arg.value) {
+                            Ok(s) if s == "latest" => RPC_DATA.latest_chain_block,
+                            Ok(_) => 0,
+                            Err(_) => extract_expr_to_u64(&arg.value).unwrap_or(0),
+                        };
                     }
                     "block_max" => {
                         parsed_params.block_max =
-                            extract_expr_to_u64(arg.value).unwrap_or(u64::MAX);
+                            extract_expr_to_u64(&arg.value).unwrap_or(u64::MAX);
                     }
                     "spec_version" => {
-                        parsed_params.spec_version = match extract_expr_to_str(arg.value) {
+                        parsed_params.spec_version = match extract_expr_to_str(&arg.value) {
                             Ok(s) => Some(s),
                             Err(_) => None,
                         }
@@ -87,7 +91,7 @@ impl MacroDataRequire {
 
 #[proc_macro_attribute]
 pub fn require(args: TokenStream, item: TokenStream) -> TokenStream {
-    let block_data = get_rpc_data();
+    let block_data = RPC_DATA.clone();
     let macro_data = parse_macro_input!(args as MacroDataRequire);
 
     if macro_data.should_ignore(block_data) {
diff --git a/macro_utils/Cargo.toml b/macro_utils/Cargo.toml
index 2f9a0f7..72af1f9 100644
--- a/macro_utils/Cargo.toml
+++ b/macro_utils/Cargo.toml
@@ -16,3 +16,4 @@ url = "2.5.0"
 syn = "2.0.48"
 quote = "1.0.35"
 tokio = { version = "1", features = ["full"] }
+lazy_static = "1.4.0"
diff --git a/macro_utils/src/lib.rs b/macro_utils/src/lib.rs
index 6011160..9d445a5 100644
--- a/macro_utils/src/lib.rs
+++ b/macro_utils/src/lib.rs
@@ -1,4 +1,5 @@
 use anyhow::anyhow;
+use lazy_static::lazy_static;
 use serde::Deserialize;
 use starknet_providers::{jsonrpc::HttpTransport, JsonRpcClient, Provider};
 use std::{fs::File, io::Read};
@@ -26,31 +27,42 @@ impl TestConfig {
     }
 }
 
+#[derive(Clone, Debug)]
 pub struct RpcData {
+    pub latest_chain_block: u64,
     pub block_number: u64,
     pub spec_version: String,
 }
 
-pub fn get_rpc_data() -> RpcData {
+lazy_static! {
+    pub static ref RPC_DATA: RpcData = get_rpc_data();
+}
+
+fn get_rpc_data() -> RpcData {
     let config =
         TestConfig::new("./secret.json").expect("'./secret.json' must contain correct node urls");
     let deoxys = JsonRpcClient::new(HttpTransport::new(
         Url::parse(&config.deoxys).expect("Error parsing Deoxys node url"),
     ));
 
+    let pathfinder = JsonRpcClient::new(HttpTransport::new(
+        Url::parse(&config.pathfinder).expect("Error parsing Pathfinder node url"),
+    ));
+
     let rt = runtime::Runtime::new().unwrap();
 
     rt.block_on(async {
         RpcData {
+            latest_chain_block: pathfinder.block_number().await.unwrap(),
             block_number: deoxys.block_number().await.unwrap(),
             spec_version: deoxys.spec_version().await.unwrap(),
         }
     })
 }
 
-pub fn extract_expr_to_str(expr: Expr) -> anyhow::Result<String> {
+pub fn extract_expr_to_str(expr: &Expr) -> anyhow::Result<String> {
     match expr {
-        Expr::Lit(expr_lit) => match expr_lit.lit {
+        Expr::Lit(expr_lit) => match &expr_lit.lit {
             Lit::Str(lit_str) => anyhow::Ok(lit_str.value()),
             _ => Err(anyhow!("Not a string literal")),
         },
@@ -58,9 +70,9 @@ pub fn extract_expr_to_str(expr: Expr) -> anyhow::Result<String> {
     }
 }
 
-pub fn extract_expr_to_u64(expr: Expr) -> anyhow::Result<u64> {
+pub fn extract_expr_to_u64(expr: &Expr) -> anyhow::Result<u64> {
     match expr {
-        Expr::Lit(expr_lit) => match expr_lit.lit {
+        Expr::Lit(expr_lit) => match &expr_lit.lit {
             Lit::Int(lit_int) => match lit_int.base10_parse::<u64>() {
                 Ok(n) => anyhow::Ok(n),
                 Err(_) => Err(anyhow!("Failed to convert literal")),
diff --git a/unit_tests/tests/test_block_hash_and_number.rs b/unit_tests/tests/test_block_hash_and_number.rs
index 3cbcc0f..6336c00 100644
--- a/unit_tests/tests/test_block_hash_and_number.rs
+++ b/unit_tests/tests/test_block_hash_and_number.rs
@@ -15,7 +15,7 @@ use starknet_providers::{
 /// purpose: get block hash and number on latest block.
 /// success case: retrieves correct block hash and number.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_latest_block(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
diff --git a/unit_tests/tests/test_block_number.rs b/unit_tests/tests/test_block_number.rs
index f545ffb..493e9f5 100644
--- a/unit_tests/tests/test_block_number.rs
+++ b/unit_tests/tests/test_block_number.rs
@@ -14,7 +14,7 @@ use starknet_providers::{
 /// purpose: call blockNumber on latest block.
 /// success case: must return valid non-zero block number.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_existing_block(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
diff --git a/unit_tests/tests/test_call.rs b/unit_tests/tests/test_call.rs
index d0059f7..a80ba79 100644
--- a/unit_tests/tests/test_call.rs
+++ b/unit_tests/tests/test_call.rs
@@ -79,7 +79,7 @@ async fn fail_non_existing_contract(clients: HashMap<String, JsonRpcClient<HttpT
 /// purpose: function request `name` to StarkGate ETH bridge contract
 /// fail case: invalid field element
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn fail_invalid_contract_entry_point_selector(
@@ -113,7 +113,7 @@ async fn fail_invalid_contract_entry_point_selector(
 /// purpose: function request `balanceOf` to StarkGate ETH bridge contract
 /// fail case: missing call data. This is different from solely *invalid* call data, as we will see shortly
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn fail_missing_contract_call_data(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -145,7 +145,7 @@ async fn fail_missing_contract_call_data(clients: HashMap<String, JsonRpcClient<
 /// purpose: function request `balanceOf` to StarkGate ETH bridge contract
 /// fail case: invalid call data. This does not cause an error upon calling the contract but returns felt 0x0
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn fail_invalid_contract_call_data(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -175,7 +175,7 @@ async fn fail_invalid_contract_call_data(clients: HashMap<String, JsonRpcClient<
 /// purpose: function request `name` to StarkGate ETH bridge contract
 /// fail case: too many arguments in call data
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn fail_too_many_call_data(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -205,7 +205,7 @@ async fn fail_too_many_call_data(clients: HashMap<String, JsonRpcClient<HttpTran
 /// purpose: function request `name` to StarkGate ETH bridge contract
 /// success case: should return 'Ether'
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_correct_call(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -248,7 +248,7 @@ async fn work_correct_call(clients: HashMap<String, JsonRpcClient<HttpTransport>
 /// purpose: function request `balanceOf` to StarkGate ETH bridge contract
 /// success case: must return non-zero balance
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_correct_call_with_args(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -291,7 +291,7 @@ async fn work_correct_call_with_args(clients: HashMap<String, JsonRpcClient<Http
 /// purpose: function request `sort_tokens` to JediSwap exchange, with multiple arguments.
 /// success case: must return array of 2 non-zero values.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_with_multiple_args(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
diff --git a/unit_tests/tests/test_estimate_fee.rs b/unit_tests/tests/test_estimate_fee.rs
index 3fac579..27d1b44 100644
--- a/unit_tests/tests/test_estimate_fee.rs
+++ b/unit_tests/tests/test_estimate_fee.rs
@@ -33,6 +33,7 @@ async fn fail_non_existing_block(clients: HashMap<String, JsonRpcClient<HttpTran
     );
 }
 
+#[require(block_min = "latest")]
 #[rstest]
 #[tokio::test]
 #[ignore = "Fix failing unwrap due to empty constant"]
@@ -61,6 +62,7 @@ async fn fail_if_one_txn_cannot_be_executed(
     assert_eq!(result_deoxys, result_pathfinder);
 }
 
+#[require(block_min = "latest")]
 #[rstest]
 #[tokio::test]
 #[ignore = "Fix failing unwrap due to empty constant"]
diff --git a/unit_tests/tests/test_get_block_transaction_count.rs b/unit_tests/tests/test_get_block_transaction_count.rs
index 43b7a7d..0a2a3a8 100644
--- a/unit_tests/tests/test_get_block_transaction_count.rs
+++ b/unit_tests/tests/test_get_block_transaction_count.rs
@@ -30,7 +30,7 @@ async fn fail_non_existing_block(clients: HashMap<String, JsonRpcClient<HttpTran
     );
 }
 
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_with_latest_block(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -52,7 +52,7 @@ async fn work_with_latest_block(clients: HashMap<String, JsonRpcClient<HttpTrans
     assert_eq!(response_deoxys, response_pathfinder);
 }
 
-#[require(spec_version = "0.5.1")]
+#[require(block_min = 1, spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_with_block_one_num(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -74,7 +74,7 @@ async fn work_with_block_one_num(clients: HashMap<String, JsonRpcClient<HttpTran
     assert_eq!(response_deoxys, response_pathfinder);
 }
 
-#[require(spec_version = "0.5.1")]
+#[require(block_min = 1, spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_with_block_one_hash(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -101,7 +101,7 @@ async fn work_with_block_one_hash(clients: HashMap<String, JsonRpcClient<HttpTra
     assert_eq!(response_deoxys, response_pathfinder);
 }
 
-#[require(spec_version = "0.5.1")]
+#[require(block_min = 100_000, spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_with_block_one_hundred_thousand_num(
@@ -125,7 +125,7 @@ async fn work_with_block_one_hundred_thousand_num(
     assert_eq!(response_deoxys, response_pathfinder);
 }
 
-#[require(spec_version = "0.5.1")]
+#[require(block_min = 100_000, spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_with_block_one_hundred_thousand_hash(
diff --git a/unit_tests/tests/test_get_block_with_tx_hashes.rs b/unit_tests/tests/test_get_block_with_tx_hashes.rs
index c0582be..0e7ff00 100644
--- a/unit_tests/tests/test_get_block_with_tx_hashes.rs
+++ b/unit_tests/tests/test_get_block_with_tx_hashes.rs
@@ -42,7 +42,7 @@ async fn fail_non_existing_block(clients: HashMap<String, JsonRpcClient<HttpTran
 /// purpose: call getBlockWithTxHashes on latest validated block.
 /// success case: retrieves valid block.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_existing_block(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -82,7 +82,7 @@ async fn work_existing_block(clients: HashMap<String, JsonRpcClient<HttpTranspor
 ///
 /// Note that this can fail at the last moments of a block being validated!!!
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 #[ignore = "Pending fails some times when called on the cusp of being accepted, need virtual sequencer"]
diff --git a/unit_tests/tests/test_get_block_with_txs.rs b/unit_tests/tests/test_get_block_with_txs.rs
index edf51bc..9869cd3 100644
--- a/unit_tests/tests/test_get_block_with_txs.rs
+++ b/unit_tests/tests/test_get_block_with_txs.rs
@@ -30,7 +30,7 @@ async fn fail_non_existing_block(clients: HashMap<String, JsonRpcClient<HttpTran
     );
 }
 
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_with_latest_block(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -52,7 +52,7 @@ async fn work_with_latest_block(clients: HashMap<String, JsonRpcClient<HttpTrans
     assert_eq!(response_deoxys, response_pathfinder);
 }
 
-#[require(spec_version = "0.5.1")]
+#[require(block_min = 1, spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_with_block_one_num(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -74,7 +74,7 @@ async fn work_with_block_one_num(clients: HashMap<String, JsonRpcClient<HttpTran
     assert_eq!(response_deoxys, response_pathfinder);
 }
 
-#[require(spec_version = "0.5.1")]
+#[require(block_min = 1, spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_with_block_one_hash(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -101,7 +101,7 @@ async fn work_with_block_one_hash(clients: HashMap<String, JsonRpcClient<HttpTra
     assert_eq!(response_deoxys, response_pathfinder);
 }
 
-#[require(spec_version = "0.5.1")]
+#[require(block_min = 100_000, spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_with_block_one_hundred_thousand_num(
@@ -125,7 +125,7 @@ async fn work_with_block_one_hundred_thousand_num(
     assert_eq!(response_deoxys, response_pathfinder);
 }
 
-#[require(spec_version = "0.5.1")]
+#[require(block_min = 100_000, spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_with_block_one_hundred_thousand_hash(
diff --git a/unit_tests/tests/test_get_class_at.rs b/unit_tests/tests/test_get_class_at.rs
index bdb78ae..6de1a86 100644
--- a/unit_tests/tests/test_get_class_at.rs
+++ b/unit_tests/tests/test_get_class_at.rs
@@ -42,7 +42,7 @@ async fn fail_non_existing_block(clients: HashMap<String, JsonRpcClient<HttpTran
 /// purpose: gets contract class for inexistent contract.
 /// fail case: invalid contract address.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn fail_non_existing_contract(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -67,7 +67,7 @@ async fn fail_non_existing_contract(clients: HashMap<String, JsonRpcClient<HttpT
 /// purpose: gets legacy contract and extracts it's data.
 /// success case: should retrieve contract and decompress it to a valid json string.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = 2891, spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_contract_v0(
diff --git a/unit_tests/tests/test_get_class_hash_at.rs b/unit_tests/tests/test_get_class_hash_at.rs
index b60c12d..9e784a9 100644
--- a/unit_tests/tests/test_get_class_hash_at.rs
+++ b/unit_tests/tests/test_get_class_hash_at.rs
@@ -40,7 +40,7 @@ async fn fail_non_existing_block(clients: HashMap<String, JsonRpcClient<HttpTran
 /// purpose: call getClassHashAt on non-existent contract.
 /// fail case: invalid contract hash.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn fail_non_existing_contract(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -68,7 +68,7 @@ async fn fail_non_existing_contract(clients: HashMap<String, JsonRpcClient<HttpT
 /// purpose: call getClassHashAt on latest block.
 /// success case: retrieve valid class hash.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_block_latest(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -99,9 +99,10 @@ async fn work_block_latest(clients: HashMap<String, JsonRpcClient<HttpTransport>
 /// purpose: call getClassHashAt on pending block.
 /// success case: retrieve valid class hash.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
+#[ignore = "Pending fails some times when called on the cusp of being accepted, need virtual sequencer"]
 async fn work_block_pending(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
     let deoxys = &clients[DEOXYS];
     let pathfinder = &clients[PATHFINDER];
diff --git a/unit_tests/tests/test_get_nonce.rs b/unit_tests/tests/test_get_nonce.rs
index 8261d38..9bec601 100644
--- a/unit_tests/tests/test_get_nonce.rs
+++ b/unit_tests/tests/test_get_nonce.rs
@@ -86,7 +86,7 @@ async fn fail_non_existing_contract(clients: HashMap<String, JsonRpcClient<HttpT
 /// purpose: call getNonce on ERC721 contract.
 /// success case: must return a nonce of 0.
 ///
-#[require(block_min = 500_000, spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_erc721_contract(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -109,7 +109,7 @@ async fn work_erc721_contract(clients: HashMap<String, JsonRpcClient<HttpTranspo
 /// purpose: call getNonce on ERC20 contract.
 /// success case: must return a nonce of 0.
 ///
-#[require(block_min = 500_000, spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_erc20_contract(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -132,7 +132,7 @@ async fn work_erc20_contract(clients: HashMap<String, JsonRpcClient<HttpTranspor
 /// purpose: call getNonce on account contract.
 /// success case: must return a non-zero nonce.
 ///
-#[require(block_min = 500_000, spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_account_contract(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -165,7 +165,7 @@ async fn work_account_contract(clients: HashMap<String, JsonRpcClient<HttpTransp
 /// purpose: call getNonce on account proxy contract.
 /// success case: must return a non-zero nonce.
 ///
-#[require(block_min = 500_000, spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_account_proxy_contract(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
diff --git a/unit_tests/tests/test_get_state_update.rs b/unit_tests/tests/test_get_state_update.rs
index 2d939bc..8a5bbfd 100644
--- a/unit_tests/tests/test_get_state_update.rs
+++ b/unit_tests/tests/test_get_state_update.rs
@@ -33,7 +33,7 @@ async fn fail_non_existing_block(clients: HashMap<String, JsonRpcClient<HttpTran
     );
 }
 
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 #[ignore = "Need to fix unwrap on error due to empty constants"]
diff --git a/unit_tests/tests/test_get_storage_at.rs b/unit_tests/tests/test_get_storage_at.rs
index 909f88b..ff64e8c 100644
--- a/unit_tests/tests/test_get_storage_at.rs
+++ b/unit_tests/tests/test_get_storage_at.rs
@@ -42,7 +42,7 @@ async fn fail_non_existing_block(clients: HashMap<String, JsonRpcClient<HttpTran
 /// purpose: call getStorageAt on non-existing contract.
 /// fail case: non-existing contract.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn fail_non_existing_contract(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -71,7 +71,7 @@ async fn fail_non_existing_contract(clients: HashMap<String, JsonRpcClient<HttpT
 /// purpose: call getStorageAt with invalid storage key.
 /// fail case: invalid storage key.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn fail_invalid_storage_key(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -95,7 +95,7 @@ async fn fail_invalid_storage_key(clients: HashMap<String, JsonRpcClient<HttpTra
 /// purpose: call getStorageAt with valid arguments.
 /// success case: retrieve valid storage.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_get_storage(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
diff --git a/unit_tests/tests/test_get_transaction_by_block_id_and_index.rs b/unit_tests/tests/test_get_transaction_by_block_id_and_index.rs
index b31493d..9b35b5e 100644
--- a/unit_tests/tests/test_get_transaction_by_block_id_and_index.rs
+++ b/unit_tests/tests/test_get_transaction_by_block_id_and_index.rs
@@ -61,7 +61,7 @@ async fn fail_non_existent_block_index(clients: HashMap<String, JsonRpcClient<Ht
 /// purpose: get INVOKE transaction.
 /// success case: client retrieves same transaction with getTransactionByBlockIdAndIndex and getTransactionByHash.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = 50_000, spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_deploy_invoke(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -101,7 +101,7 @@ async fn work_deploy_invoke(clients: HashMap<String, JsonRpcClient<HttpTransport
 /// purpose: get L1_HANDLER transaction.
 /// success case: client retrieves same transaction with getTransactionByBlockIdAndIndex and getTransactionByHash.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = 50_000, spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_deploy_l1_handler(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -141,7 +141,7 @@ async fn work_deploy_l1_handler(clients: HashMap<String, JsonRpcClient<HttpTrans
 /// purpose: get DECLARE transaction.
 /// success case: client retrieves same transaction with getTransactionByBlockIdAndIndex and getTransactionByHash.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = 49_990, spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_deploy_declare(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -181,7 +181,7 @@ async fn work_deploy_declare(clients: HashMap<String, JsonRpcClient<HttpTranspor
 /// purpose: get DEPLOY_ACCOUNT transaction.
 /// success case: client retrieves same transaction with getTransactionByBlockIdAndIndex and getTransactionByHash.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = 50_000, spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_deploy_account(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
diff --git a/unit_tests/tests/test_get_transaction_status.rs b/unit_tests/tests/test_get_transaction_status.rs
index 11f1671..a11ff37 100644
--- a/unit_tests/tests/test_get_transaction_status.rs
+++ b/unit_tests/tests/test_get_transaction_status.rs
@@ -40,7 +40,7 @@ async fn fail_invalid_transaction(clients: HashMap<String, JsonRpcClient<HttpTra
 /// purpose: call getTransactionStatus on transaction which has been accepted on L1.
 /// success case: retrieved transaction has been accepted on L1.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = 50_000, spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_transaction_accepted_on_l1(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -67,7 +67,7 @@ async fn work_transaction_accepted_on_l1(clients: HashMap<String, JsonRpcClient<
 /// purpose: call getTransactionStatus on last transaction from the latest block.
 /// success case: transaction is marked as accepted on L2.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_transaction_accepted_on_l2(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -109,7 +109,7 @@ async fn work_transaction_accepted_on_l2(clients: HashMap<String, JsonRpcClient<
 /// purpose: call getTransactionStatus on reverted transaction.
 /// success case: transaction is marked as reverted on L1.
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = 50_000, spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn work_transaction_reverted(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
diff --git a/unit_tests/tests/test_simulate_transaction.rs b/unit_tests/tests/test_simulate_transaction.rs
index 6c0f416..fa84d85 100644
--- a/unit_tests/tests/test_simulate_transaction.rs
+++ b/unit_tests/tests/test_simulate_transaction.rs
@@ -94,6 +94,7 @@ async fn fail_if_one_txn_cannot_be_executed(
     );
 }
 
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn works_ok_on_no_validate(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {
@@ -146,6 +147,7 @@ async fn works_ok_on_no_validate(clients: HashMap<String, JsonRpcClient<HttpTran
     assert_eq!(deoxys_simulations, pathfinder_simulations);
 }
 
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn works_ok_on_validate_with_signature(
@@ -203,6 +205,7 @@ async fn works_ok_on_validate_with_signature(
     assert_eq!(deoxys_simulations, pathfinder_simulations);
 }
 
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn works_ok_on_validate_without_signature_with_skip_validate(
@@ -261,6 +264,7 @@ async fn works_ok_on_validate_without_signature_with_skip_validate(
     assert_eq!(deoxys_simulations, pathfinder_simulations);
 }
 
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn works_ok_without_max_fee_with_skip_fee_charge(
diff --git a/unit_tests/tests/test_specversion.rs b/unit_tests/tests/test_specversion.rs
index daedcee..4797738 100644
--- a/unit_tests/tests/test_specversion.rs
+++ b/unit_tests/tests/test_specversion.rs
@@ -17,5 +17,5 @@ async fn test_specversion(deoxys: JsonRpcClient<HttpTransport>) {
     let response_deoxys = deoxys.spec_version().await.expect(ERR_DEOXYS);
 
     log::info!("Deoxys RPC spec: {}", response_deoxys);
-    assert_eq!(response_deoxys, RPC_SPEC);
+    assert_eq!(response_deoxys, SPEC_0_5_1);
 }
diff --git a/unit_tests/tests/test_syncing.rs b/unit_tests/tests/test_syncing.rs
index 2be00d8..24f3e59 100644
--- a/unit_tests/tests/test_syncing.rs
+++ b/unit_tests/tests/test_syncing.rs
@@ -11,7 +11,7 @@ use std::collections::HashMap;
 /// purpose: returns starknet sync status
 /// success case: sync status matches between providers (NOT DETERMINISTIC)
 ///
-#[require(spec_version = "0.5.1")]
+#[require(block_min = "latest", spec_version = "0.5.1")]
 #[rstest]
 #[tokio::test]
 async fn syncing(clients: HashMap<String, JsonRpcClient<HttpTransport>>) {