diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 6281bc9..aafae80 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -53,8 +53,17 @@ jobs:
         name: unit-test-dev-test-pascal
         with:
           command: test
-          args: --release --features=dev --manifest-path light-client/Cargo.toml --lib test::dev_test_pascal
+          args: --release --features=dev --manifest-path light-client/Cargo.toml --lib test::dev_test_after_pascal
         env:
           MINIMUM_TIMESTAMP_SUPPORTED: 1
           MINIMUM_HEIGHT_SUPPORTED: 1
-          PASCAL_TIMESTAMP: 1
\ No newline at end of file
+          PASCAL_TIMESTAMP: 1
+      - uses: actions-rs/cargo@v1
+        name: unit-test-dev-test-pascal
+        with:
+          command: test
+          args: --release --features=dev --manifest-path light-client/Cargo.toml --lib test::dev_test_before_pascal
+        env:
+          MINIMUM_TIMESTAMP_SUPPORTED: 1
+          MINIMUM_HEIGHT_SUPPORTED: 1
+          PASCAL_TIMESTAMP: 1800000000
\ No newline at end of file
diff --git a/light-client/src/errors.rs b/light-client/src/errors.rs
index 1d49691..6e1531c 100644
--- a/light-client/src/errors.rs
+++ b/light-client/src/errors.rs
@@ -99,6 +99,8 @@ pub enum Error {
     UnexpectedCurrentValidatorsHashInEpoch(Height, Height, Hash, Hash),
     UnexpectedUntrustedValidators(BlockNumber, BlockNumber),
     MissingRequestsHash(BlockNumber),
+    UnexpectedRequestsHash(BlockNumber, Vec<u8>),
+    UnexpectedHeaderRLP(BlockNumber),
 
     // Vote attestation
     UnexpectedTooManyHeadersToFinalize(BlockNumber, usize),
@@ -388,6 +390,12 @@ impl core::fmt::Display for Error {
             Error::MissingRequestsHash(e1) => {
                 write!(f, "MissingRequestsHash : {}", e1)
             }
+            Error::UnexpectedRequestsHash(e1, e2) => {
+                write!(f, "UnexpectedRequestsHash : {} {:?}", e1, e2)
+            }
+            Error::UnexpectedHeaderRLP(e1) => {
+                write!(f, "UnexpectedHeaderRLP : {}", e1)
+            }
         }
     }
 }
diff --git a/light-client/src/header/eth_header.rs b/light-client/src/header/eth_header.rs
index 921f43f..c6b9919 100644
--- a/light-client/src/header/eth_header.rs
+++ b/light-client/src/header/eth_header.rs
@@ -421,7 +421,6 @@ impl TryFrom<RawETHHeader> for ETHHeader {
         if nonce != EMPTY_NONCE {
             return Err(Error::UnexpectedNonce(number));
         }
-
         let hash: Hash = keccak_256(value.header.as_slice());
 
         let epoch = if number % BLOCKS_PER_EPOCH == 0 {
@@ -432,8 +431,21 @@ impl TryFrom<RawETHHeader> for ETHHeader {
         };
 
         #[allow(clippy::absurd_extreme_comparisons)]
-        if PASCAL_TIMESTAMP > 0 && timestamp >= PASCAL_TIMESTAMP && requests_hash.is_none() {
-            return Err(Error::MissingRequestsHash(number));
+        if PASCAL_TIMESTAMP > 0 {
+            if timestamp >= PASCAL_TIMESTAMP {
+                if requests_hash.is_none() {
+                    return Err(Error::MissingRequestsHash(number));
+                }
+                // Ensure no more header element.
+                if rlp.try_next().is_ok() {
+                    return Err(Error::UnexpectedHeaderRLP(number));
+                }
+            } else if timestamp < PASCAL_TIMESTAMP && requests_hash.is_some() {
+                return Err(Error::UnexpectedRequestsHash(
+                    number,
+                    requests_hash.unwrap(),
+                ));
+            }
         }
 
         Ok(Self {
@@ -838,7 +850,7 @@ pub(crate) mod test {
     }
 
     #[cfg(feature = "dev")]
-    mod dev_test_pascal {
+    mod dev_test_after_pascal {
         use crate::errors::Error;
         use crate::fixture::{decode_header, localnet};
         use crate::header::eth_header::ETHHeader;
@@ -847,7 +859,7 @@ pub(crate) mod test {
 
         #[test]
         fn test_error_missing_request_hash() {
-            // number = 401
+            // timestamp = 1721396460
             let raw_header = localnet().epoch_header_plus_1_rlp();
             let raw_header = EthHeader { header: raw_header };
             let result = ETHHeader::try_from(raw_header).unwrap_err();
@@ -857,10 +869,52 @@ pub(crate) mod test {
             }
         }
 
+        #[test]
+        fn test_error_invalid_header_rlp_length() {
+            let mut header = hex!("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").to_vec();
+            // add unnecessary data
+            header.push(0x80);
+            let raw_header = EthHeader { header };
+            let result = ETHHeader::try_from(raw_header).unwrap_err();
+            match result {
+                Error::UnexpectedHeaderRLP(_) => {}
+                _ => unreachable!(),
+            }
+        }
+
         #[test]
         fn test_success_after_bep466() {
+            // timestamp=1737443367
             let header = hex!("f90370a04a99d244666a287d9aaa1a81aa5bba573f156865369023eaa53a4ba8bb303ad1a01dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d4934794e04db2de85453e0936b441c339a26d10cfa71b50a0d0a25a7c6b93d5d2e8f7e2075d2886fa62840f31c127b880b7cd503e2d364163a056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421a056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421b90100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000282071b8402625a008084678f4827b90111d883010503846765746888676f312e32332e35856c696e75780000002f5b9772f8ae0fb860959e5c417ecd8a5e5ddabd85485cf2cc4433f26beea076d77bbc6f461e4129881b8772bdae5fdd6ca927b571662ac5750d4abeca4f44a4406ab3254e0d98e6ee92b5b6396122853b45db2d18d24fb79e8397e253ca10a2a03b3b18e5961173b5f848820719a0e5ef3de482ecc3de5aea0efb17457d7edc5b1a39fc97c29cc5780b4665c9ca2082071aa04a99d244666a287d9aaa1a81aa5bba573f156865369023eaa53a4ba8bb303ad180aba9a203cbc9ac6e2eabbc44b15f7c526ec5f9d570a0addc005d5958d8415f760794e65762057ff9956dce68034d30cca6d9cc2ac3eb35f699d47c74931c470a01a0000000000000000000000000000000000000000000000000000000000000000088000000000000000080a056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b4218080a00000000000000000000000000000000000000000000000000000000000000000a0e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855").to_vec();
             decode_header(header);
         }
     }
+
+    #[cfg(feature = "dev")]
+    mod dev_test_before_pascal {
+        use crate::errors::Error;
+        use crate::fixture::{decode_header, localnet};
+        use crate::header::eth_header::ETHHeader;
+        use hex_literal::hex;
+        use parlia_ibc_proto::ibc::lightclients::parlia::v1::EthHeader;
+
+        #[test]
+        fn test_error_request_hash() {
+            // timestamp=1737443367
+            let header = hex!("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").to_vec();
+            let raw_header = EthHeader { header };
+            let result = ETHHeader::try_from(raw_header).unwrap_err();
+            match result {
+                Error::UnexpectedRequestsHash(_, _) => {}
+                _ => unreachable!(),
+            }
+        }
+
+        #[test]
+        fn test_success_before_bep466() {
+            // timestamp=1721396460
+            let raw_header = localnet().epoch_header_plus_1_rlp();
+            decode_header(raw_header);
+        }
+    }
 }