diff --git a/target_chains/solana/Cargo.lock b/target_chains/solana/Cargo.lock
index c0176fb066..938511bf6b 100644
--- a/target_chains/solana/Cargo.lock
+++ b/target_chains/solana/Cargo.lock
@@ -3604,6 +3604,7 @@ dependencies = [
  "rand 0.8.5",
  "serde_wormhole",
  "solana-program",
+ "solana-program-test",
  "solana-sdk",
  "tokio",
  "wormhole-core-bridge-solana",
diff --git a/target_chains/solana/programs/pyth-solana-receiver/Cargo.toml b/target_chains/solana/programs/pyth-solana-receiver/Cargo.toml
index 1887b74488..363ac185f7 100644
--- a/target_chains/solana/programs/pyth-solana-receiver/Cargo.toml
+++ b/target_chains/solana/programs/pyth-solana-receiver/Cargo.toml
@@ -29,6 +29,7 @@ rand = "0.8.5"
 
 [dev-dependencies]
 solana-sdk = { workspace = true }
+solana-program-test = { workspace = true }
 tokio = { workspace = true }
 program-simulator = { path = "../../program_simulator" }
 wormhole-vaas-serde = { workspace = true }
diff --git a/target_chains/solana/programs/pyth-solana-receiver/tests/test_post_updates_with_wormhole.rs b/target_chains/solana/programs/pyth-solana-receiver/tests/test_post_updates_with_wormhole.rs
new file mode 100644
index 0000000000..7376271bb4
--- /dev/null
+++ b/target_chains/solana/programs/pyth-solana-receiver/tests/test_post_updates_with_wormhole.rs
@@ -0,0 +1,254 @@
+use {
+    anchor_lang::{InstructionData, ToAccountMetas},
+    common_test_utils::{
+        assert_treasury_balance, build_guardian_set_account, default_receiver_config,
+        WrongSetupOption, DEFAULT_GUARDIAN_SET_INDEX,
+    },
+    program_simulator::ProgramSimulator,
+    pyth_solana_receiver::{
+        instruction::{Initialize, PostUpdate},
+        sdk::{
+            deserialize_accumulator_update_data, get_guardian_set_address, DEFAULT_TREASURY_ID,
+            VAA_SPLIT_INDEX,
+        },
+    },
+    pyth_solana_receiver_sdk::{
+        config::Config,
+        pda::get_config_address,
+        price_update::{PriceUpdateV2, VerificationLevel},
+        PYTH_PUSH_ORACLE_ID,
+    },
+    pythnet_sdk::{
+        messages::Message,
+        test_utils::{create_accumulator_message, create_dummy_price_feed_message},
+    },
+    solana_program::instruction::Instruction,
+    solana_program_test::ProgramTest,
+    solana_sdk::{rent::Rent, signature::Keypair, signer::Signer},
+    wormhole_core_bridge_solana::{
+        sdk::{WriteEncodedVaaArgs, VAA_START},
+        ID as BRIDGE_ID,
+    },
+};
+
+/// Creates a ProcessInstruction-compatible function pointer from the Anchor-generated
+/// entry function. Anchor constrains `&'info [AccountInfo<'info>]` (matching lifetimes),
+/// while ProcessInstruction has independent lifetimes. This is safe because ProgramTest's
+/// invoke_builtin_function always provides matching lifetimes (both derived from the same buffer).
+fn wormhole_process_instruction() -> solana_program::entrypoint::ProcessInstruction {
+    unsafe { std::mem::transmute(wormhole_core_bridge_solana::entry as usize) }
+}
+
+#[tokio::test]
+async fn test_post_update_with_wormhole() {
+    // 1. Setup: Create accumulator message with dummy price feeds
+    let feed_1 = create_dummy_price_feed_message(100);
+    let feed_2 = create_dummy_price_feed_message(200);
+    let message =
+        create_accumulator_message(&[&feed_1, &feed_2], &[&feed_1, &feed_2], false, false, None);
+    let (vaa, merkle_price_updates) = deserialize_accumulator_update_data(message).unwrap();
+
+    // 2. Program setup: ProgramTest with pyth_solana_receiver, pyth_push_oracle, and wormhole core-bridge
+    let mut program_test = ProgramTest::default();
+    program_test.add_program("pyth_solana_receiver", pyth_solana_receiver::ID, None);
+    program_test.add_program("pyth_push_oracle", PYTH_PUSH_ORACLE_ID, None);
+    program_test.add_program(
+        "wormhole_core_bridge_solana",
+        BRIDGE_ID,
+        solana_program_test::processor!(wormhole_process_instruction()),
+    );
+
+    // Add guardian set account at the correct PDA
+    program_test.add_account(
+        get_guardian_set_address(BRIDGE_ID, DEFAULT_GUARDIAN_SET_INDEX),
+        build_guardian_set_account(WrongSetupOption::None),
+    );
+
+    let mut program_simulator = ProgramSimulator::start_from_program_test(program_test).await;
+
+    // Initialize pyth receiver config
+    let setup_keypair = program_simulator.get_funded_keypair().await.unwrap();
+    let initial_config = default_receiver_config(setup_keypair.pubkey());
+
+    program_simulator
+        .process_ix_with_default_compute_limit(
+            Initialize::populate(&setup_keypair.pubkey(), initial_config.clone()),
+            &vec![&setup_keypair],
+            None,
+        )
+        .await
+        .unwrap();
+
+    let config_account = program_simulator
+        .get_anchor_account_data::<Config>(get_config_address())
+        .await
+        .unwrap();
+    assert_eq!(config_account, initial_config);
+
+    // 3. Create encoded VAA via core-bridge instructions
+    let write_authority = program_simulator.get_funded_keypair().await.unwrap();
+    let encoded_vaa_keypair = Keypair::new();
+    let encoded_vaa_size: usize = vaa.len() + VAA_START;
+
+    // TX1: Create account for encoded VAA
+    let create_encoded_vaa = solana_sdk::system_instruction::create_account(
+        &write_authority.pubkey(),
+        &encoded_vaa_keypair.pubkey(),
+        Rent::default().minimum_balance(encoded_vaa_size),
+        encoded_vaa_size as u64,
+        &BRIDGE_ID,
+    );
+
+    program_simulator
+        .process_ix_with_default_compute_limit(
+            create_encoded_vaa,
+            &vec![&encoded_vaa_keypair],
+            Some(&write_authority),
+        )
+        .await
+        .unwrap();
+
+    // TX2: Init encoded VAA
+    let init_encoded_vaa_instruction = Instruction {
+        program_id: BRIDGE_ID,
+        accounts: wormhole_core_bridge_solana::accounts::InitEncodedVaa {
+            write_authority: write_authority.pubkey(),
+            encoded_vaa: encoded_vaa_keypair.pubkey(),
+        }
+        .to_account_metas(None),
+        data: wormhole_core_bridge_solana::instruction::InitEncodedVaa.data(),
+    };
+
+    program_simulator
+        .process_ix_with_default_compute_limit(
+            init_encoded_vaa_instruction,
+            &vec![],
+            Some(&write_authority),
+        )
+        .await
+        .unwrap();
+
+    // TX3: Write first part of VAA data
+    let write_encoded_vaa_instruction_1 = Instruction {
+        program_id: BRIDGE_ID,
+        accounts: wormhole_core_bridge_solana::accounts::WriteEncodedVaa {
+            write_authority: write_authority.pubkey(),
+            draft_vaa: encoded_vaa_keypair.pubkey(),
+        }
+        .to_account_metas(None),
+        data: wormhole_core_bridge_solana::instruction::WriteEncodedVaa {
+            args: WriteEncodedVaaArgs {
+                index: 0,
+                data: vaa[..VAA_SPLIT_INDEX].to_vec(),
+            },
+        }
+        .data(),
+    };
+
+    program_simulator
+        .process_ix_with_default_compute_limit(
+            write_encoded_vaa_instruction_1,
+            &vec![],
+            Some(&write_authority),
+        )
+        .await
+        .unwrap();
+
+    // TX4: Write remaining VAA data
+    let write_encoded_vaa_instruction_2 = Instruction {
+        program_id: BRIDGE_ID,
+        accounts: wormhole_core_bridge_solana::accounts::WriteEncodedVaa {
+            write_authority: write_authority.pubkey(),
+            draft_vaa: encoded_vaa_keypair.pubkey(),
+        }
+        .to_account_metas(None),
+        data: wormhole_core_bridge_solana::instruction::WriteEncodedVaa {
+            args: WriteEncodedVaaArgs {
+                index: VAA_SPLIT_INDEX.try_into().unwrap(),
+                data: vaa[VAA_SPLIT_INDEX..].to_vec(),
+            },
+        }
+        .data(),
+    };
+
+    program_simulator
+        .process_ix_with_default_compute_limit(
+            write_encoded_vaa_instruction_2,
+            &vec![],
+            Some(&write_authority),
+        )
+        .await
+        .unwrap();
+
+    // TX5: Verify encoded VAA
+    let guardian_set = get_guardian_set_address(BRIDGE_ID, DEFAULT_GUARDIAN_SET_INDEX);
+
+    let verify_encoded_vaa_instruction = Instruction {
+        program_id: BRIDGE_ID,
+        accounts: wormhole_core_bridge_solana::accounts::VerifyEncodedVaaV1 {
+            write_authority: write_authority.pubkey(),
+            draft_vaa: encoded_vaa_keypair.pubkey(),
+            guardian_set,
+        }
+        .to_account_metas(None),
+        data: wormhole_core_bridge_solana::instruction::VerifyEncodedVaaV1 {}.data(),
+    };
+
+    program_simulator
+        .process_ix_with_default_compute_limit(
+            verify_encoded_vaa_instruction,
+            &vec![],
+            Some(&write_authority),
+        )
+        .await
+        .unwrap();
+
+    // 4. Post update using the core-bridge-verified encoded VAA
+    assert_treasury_balance(&mut program_simulator, 0, DEFAULT_TREASURY_ID).await;
+
+    let poster = program_simulator.get_funded_keypair().await.unwrap();
+    let price_update_keypair = Keypair::new();
+
+    program_simulator
+        .process_ix_with_default_compute_limit(
+            PostUpdate::populate(
+                poster.pubkey(),
+                poster.pubkey(),
+                encoded_vaa_keypair.pubkey(),
+                price_update_keypair.pubkey(),
+                merkle_price_updates[0].clone(),
+                DEFAULT_TREASURY_ID,
+            ),
+            &vec![&poster, &price_update_keypair],
+            None,
+        )
+        .await
+        .unwrap();
+
+    // 5. Assertions
+    assert_treasury_balance(
+        &mut program_simulator,
+        Rent::default().minimum_balance(0),
+        DEFAULT_TREASURY_ID,
+    )
+    .await;
+
+    let price_update_account = program_simulator
+        .get_anchor_account_data::<PriceUpdateV2>(price_update_keypair.pubkey())
+        .await
+        .unwrap();
+
+    assert_eq!(price_update_account.write_authority, poster.pubkey());
+    assert_eq!(
+        price_update_account.verification_level,
+        VerificationLevel::Full
+    );
+    assert_eq!(
+        Message::PriceFeedMessage(price_update_account.price_message),
+        feed_1
+    );
+    assert_eq!(
+        price_update_account.posted_slot,
+        program_simulator.get_clock().await.unwrap().slot
+    );
+}