diff --git a/program/rust/src/deserialize.rs b/program/rust/src/deserialize.rs
index 6af073aad..e7772168e 100644
--- a/program/rust/src/deserialize.rs
+++ b/program/rust/src/deserialize.rs
@@ -89,7 +89,7 @@ pub fn load_checked<'a, T: PythAccount>(
             account_header.magic_number == PC_MAGIC
                 && account_header.version == version
                 && account_header.account_type == T::ACCOUNT_TYPE,
-            ProgramError::InvalidArgument,
+            OracleError::InvalidAccountHeader.into(),
         )?;
     }
 
diff --git a/program/rust/src/error.rs b/program/rust/src/error.rs
index 9be5c9710..87878045e 100644
--- a/program/rust/src/error.rs
+++ b/program/rust/src/error.rs
@@ -40,6 +40,10 @@ pub enum OracleError {
     InvalidUpgradeAuthority        = 614,
     #[error("FailedPdaVerification")]
     InvalidPda                     = 615,
+    #[error("InvalidAccountHeader")]
+    InvalidAccountHeader           = 616,
+    #[error("InvalidNumberOfAccounts")]
+    InvalidNumberOfAccounts        = 617,
 }
 
 impl From<OracleError> for ProgramError {
diff --git a/program/rust/src/rust_oracle.rs b/program/rust/src/rust_oracle.rs
index 1645cc807..1258563f8 100644
--- a/program/rust/src/rust_oracle.rs
+++ b/program/rust/src/rust_oracle.rs
@@ -91,7 +91,7 @@ pub fn resize_price_account(
 ) -> ProgramResult {
     let [funding_account_info, price_account_info, system_program] = match accounts {
         [x, y, z] => Ok([x, y, z]),
-        _ => Err(ProgramError::InvalidArgument),
+        _ => Err(OracleError::InvalidNumberOfAccounts),
     }?;
 
     check_valid_funding_account(funding_account_info)?;
@@ -148,7 +148,7 @@ pub fn init_mapping(
 ) -> ProgramResult {
     let [funding_account, fresh_mapping_account] = match accounts {
         [x, y] => Ok([x, y]),
-        _ => Err(ProgramError::InvalidArgument),
+        _ => Err(OracleError::InvalidNumberOfAccounts),
     }?;
 
     check_valid_funding_account(funding_account)?;
@@ -168,7 +168,7 @@ pub fn add_mapping(
 ) -> ProgramResult {
     let [funding_account, cur_mapping, next_mapping] = match accounts {
         [x, y, z] => Ok([x, y, z]),
-        _ => Err(ProgramError::InvalidArgument),
+        _ => Err(OracleError::InvalidNumberOfAccounts),
     }?;
 
     check_valid_funding_account(funding_account)?;
@@ -203,7 +203,7 @@ pub fn upd_price(
     let [funding_account, price_account, clock_account] = match accounts {
         [x, y, z] => Ok([x, y, z]),
         [x, y, _, z] => Ok([x, y, z]),
-        _ => Err(ProgramError::InvalidArgument),
+        _ => Err(OracleError::InvalidNumberOfAccounts),
     }?;
 
     check_valid_funding_account(funding_account)?;
@@ -319,7 +319,7 @@ pub fn add_price(
 
     let [funding_account, product_account, price_account] = match accounts {
         [x, y, z] => Ok([x, y, z]),
-        _ => Err(ProgramError::InvalidArgument),
+        _ => Err(OracleError::InvalidNumberOfAccounts),
     }?;
 
     check_valid_funding_account(funding_account)?;
@@ -354,7 +354,7 @@ pub fn del_price(
 ) -> ProgramResult {
     let [funding_account, product_account, price_account] = match accounts {
         [w, x, y] => Ok([w, x, y]),
-        _ => Err(ProgramError::InvalidArgument),
+        _ => Err(OracleError::InvalidNumberOfAccounts),
     }?;
 
     check_valid_funding_account(funding_account)?;
@@ -399,7 +399,7 @@ pub fn init_price(
 
     let [funding_account, price_account] = match accounts {
         [x, y] => Ok([x, y]),
-        _ => Err(ProgramError::InvalidArgument),
+        _ => Err(OracleError::InvalidNumberOfAccounts),
     }?;
 
     check_valid_funding_account(funding_account)?;
@@ -469,7 +469,7 @@ pub fn add_publisher(
 
     let [funding_account, price_account] = match accounts {
         [x, y] => Ok([x, y]),
-        _ => Err(ProgramError::InvalidArgument),
+        _ => Err(OracleError::InvalidNumberOfAccounts),
     }?;
 
     check_valid_funding_account(funding_account)?;
@@ -519,7 +519,7 @@ pub fn del_publisher(
 
     let [funding_account, price_account] = match accounts {
         [x, y] => Ok([x, y]),
-        _ => Err(ProgramError::InvalidArgument),
+        _ => Err(OracleError::InvalidNumberOfAccounts),
     }?;
 
     check_valid_funding_account(funding_account)?;
@@ -555,7 +555,7 @@ pub fn add_product(
 ) -> ProgramResult {
     let [funding_account, tail_mapping_account, new_product_account] = match accounts {
         [x, y, z] => Ok([x, y, z]),
-        _ => Err(ProgramError::InvalidArgument),
+        _ => Err(OracleError::InvalidNumberOfAccounts),
     }?;
 
     check_valid_funding_account(funding_account)?;
@@ -592,7 +592,7 @@ pub fn upd_product(
 ) -> ProgramResult {
     let [funding_account, product_account] = match accounts {
         [x, y] => Ok([x, y]),
-        _ => Err(ProgramError::InvalidArgument),
+        _ => Err(OracleError::InvalidNumberOfAccounts),
     }?;
 
     check_valid_funding_account(funding_account)?;
@@ -657,7 +657,7 @@ pub fn set_min_pub(
 
     let [funding_account, price_account] = match accounts {
         [x, y] => Ok([x, y]),
-        _ => Err(ProgramError::InvalidArgument),
+        _ => Err(OracleError::InvalidNumberOfAccounts),
     }?;
 
     check_valid_funding_account(funding_account)?;
@@ -683,7 +683,7 @@ pub fn del_product(
 ) -> ProgramResult {
     let [funding_account, mapping_account, product_account] = match accounts {
         [w, x, y] => Ok([w, x, y]),
-        _ => Err(ProgramError::InvalidArgument),
+        _ => Err(OracleError::InvalidNumberOfAccounts),
     }?;
 
     check_valid_funding_account(funding_account)?;
@@ -751,7 +751,7 @@ pub fn upd_permissions(
     let [funding_account, program_account, programdata_account, permissions_account, system_program] =
         match accounts {
             [v, w, x, y, z] => Ok([v, w, x, y, z]),
-            _ => Err(ProgramError::InvalidArgument),
+            _ => Err(OracleError::InvalidNumberOfAccounts),
         }?;
 
     let cmd_args = load::<UpdPermissionsArgs>(instruction_data)?;
diff --git a/program/rust/src/tests/test_add_mapping.rs b/program/rust/src/tests/test_add_mapping.rs
index ac56f969b..ddb6f2f47 100644
--- a/program/rust/src/tests/test_add_mapping.rs
+++ b/program/rust/src/tests/test_add_mapping.rs
@@ -9,6 +9,7 @@ use crate::deserialize::{
     load_account_as_mut,
     load_checked,
 };
+use crate::error::OracleError;
 use crate::instruction::{
     CommandHeader,
     OracleCommand,
@@ -98,7 +99,7 @@ fn test_add_mapping() {
             ],
             instruction_data
         ),
-        Err(ProgramError::InvalidArgument)
+        Err(OracleError::InvalidAccountHeader.into())
     );
 
     {
diff --git a/program/rust/src/tests/test_add_price.rs b/program/rust/src/tests/test_add_price.rs
index 882ae74bc..a384221a7 100644
--- a/program/rust/src/tests/test_add_price.rs
+++ b/program/rust/src/tests/test_add_price.rs
@@ -111,7 +111,7 @@ fn test_add_price() {
             &[funding_account.clone(), product_account.clone()],
             instruction_data_add_price
         ),
-        Err(ProgramError::InvalidArgument)
+        Err(OracleError::InvalidNumberOfAccounts.into())
     );
 
     // Price account is already initialized
@@ -191,6 +191,6 @@ fn test_add_price() {
             ],
             instruction_data_add_price
         ),
-        Err(ProgramError::InvalidArgument)
+        Err(OracleError::InvalidAccountHeader.into())
     );
 }
diff --git a/program/rust/src/tests/test_add_publisher.rs b/program/rust/src/tests/test_add_publisher.rs
index 36859af95..8f2c1c103 100644
--- a/program/rust/src/tests/test_add_publisher.rs
+++ b/program/rust/src/tests/test_add_publisher.rs
@@ -95,7 +95,7 @@ fn test_add_publisher() {
             &[funding_account.clone(), price_account.clone(),],
             instruction_data
         ),
-        Err(ProgramError::InvalidArgument)
+        Err(OracleError::InvalidAccountHeader.into())
     );
 
     initialize_pyth_account_checked::<PriceAccount>(&price_account, PC_VERSION).unwrap();
diff --git a/program/rust/src/tests/test_init_mapping.rs b/program/rust/src/tests/test_init_mapping.rs
index 298453be4..384483f6c 100644
--- a/program/rust/src/tests/test_init_mapping.rs
+++ b/program/rust/src/tests/test_init_mapping.rs
@@ -14,7 +14,6 @@ use crate::processor::process_instruction;
 use crate::tests::test_utils::AccountSetup;
 use crate::utils::clear_account;
 use bytemuck::bytes_of;
-use solana_program::program_error::ProgramError;
 use solana_program::pubkey::Pubkey;
 use std::cell::RefCell;
 use std::rc::Rc;
@@ -62,7 +61,7 @@ fn test_init_mapping() {
 
     assert_eq!(
         process_instruction(&program_id, &[funding_account.clone()], instruction_data),
-        Err(ProgramError::InvalidArgument)
+        Err(OracleError::InvalidNumberOfAccounts.into())
     );
 
     funding_account.is_signer = false;
diff --git a/program/rust/src/tests/test_init_price.rs b/program/rust/src/tests/test_init_price.rs
index e180ec2c2..1449b2ea2 100644
--- a/program/rust/src/tests/test_init_price.rs
+++ b/program/rust/src/tests/test_init_price.rs
@@ -50,7 +50,7 @@ fn test_init_price() {
             &[funding_account.clone(), price_account.clone()],
             instruction_data
         ),
-        Err(ProgramError::InvalidArgument)
+        Err(OracleError::InvalidAccountHeader.into())
     );
 
     initialize_pyth_account_checked::<PriceAccount>(&price_account, PC_VERSION).unwrap();