diff --git a/Cargo.lock b/Cargo.lock
index 5103a890..24f22428 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1817,6 +1817,7 @@ dependencies = [
  "solana-epoch-schedule",
  "solana-hash",
  "solana-instruction",
+ "solana-instructions-sysvar",
  "solana-loader-v3-interface 3.0.0",
  "solana-loader-v4-interface",
  "solana-log-collector",
diff --git a/Cargo.toml b/Cargo.toml
index 67574c61..d9fe7539 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -63,6 +63,7 @@ solana-epoch-rewards = "2.2"
 solana-epoch-schedule = "2.2"
 solana-hash = "2.2"
 solana-instruction = "2.2"
+solana-instructions-sysvar = "2.2"
 solana-keccak-hasher = "2.2"
 solana-loader-v3-interface = "3.0"
 solana-loader-v4-interface = "2.2"
diff --git a/harness/Cargo.toml b/harness/Cargo.toml
index 6bbdc70c..7de3d3cd 100644
--- a/harness/Cargo.toml
+++ b/harness/Cargo.toml
@@ -48,6 +48,7 @@ solana-epoch-rewards = { workspace = true }
 solana-epoch-schedule = { workspace = true }
 solana-hash = { workspace = true }
 solana-instruction = { workspace = true }
+solana-instructions-sysvar = { workspace = true }
 solana-loader-v3-interface = { workspace = true, features = ["serde"] }
 solana-loader-v4-interface = { workspace = true }
 solana-log-collector = { workspace = true }
diff --git a/harness/src/instructions_sysvar.rs b/harness/src/instructions_sysvar.rs
new file mode 100644
index 00000000..4309d7ff
--- /dev/null
+++ b/harness/src/instructions_sysvar.rs
@@ -0,0 +1,40 @@
+use {
+    crate::Mollusk,
+    solana_account::Account,
+    solana_instruction::{BorrowedAccountMeta, BorrowedInstruction, Instruction},
+    solana_instructions_sysvar::construct_instructions_data,
+    solana_pubkey::Pubkey,
+};
+
+pub fn keyed_account(mollusk: &Mollusk, instructions: &[Instruction]) -> (Pubkey, Account) {
+    let data = construct_instructions_data(
+        instructions
+            .iter()
+            .map(|instruction| BorrowedInstruction {
+                program_id: &instruction.program_id,
+                accounts: instruction
+                    .accounts
+                    .iter()
+                    .map(|meta| BorrowedAccountMeta {
+                        pubkey: &meta.pubkey,
+                        is_signer: meta.is_signer,
+                        is_writable: meta.is_writable,
+                    })
+                    .collect(),
+                data: &instruction.data,
+            })
+            .collect::<Vec<_>>()
+            .as_slice(),
+    );
+
+    (
+        solana_instructions_sysvar::ID,
+        Account {
+            lamports: mollusk.sysvars.rent.minimum_balance(data.len()),
+            data,
+            owner: solana_sysvar_id::ID,
+            executable: false,
+            rent_epoch: Default::default(),
+        },
+    )
+}
diff --git a/harness/src/lib.rs b/harness/src/lib.rs
index ebb7d38c..2d359ddc 100644
--- a/harness/src/lib.rs
+++ b/harness/src/lib.rs
@@ -445,6 +445,7 @@ pub mod epoch_stake;
 pub mod file;
 #[cfg(any(feature = "fuzz", feature = "fuzz-fd"))]
 pub mod fuzz;
+pub mod instructions_sysvar;
 pub mod program;
 pub mod sysvar;
 
@@ -666,6 +667,15 @@ impl Mollusk {
         &self,
         instruction: &Instruction,
         accounts: &[(Pubkey, Account)],
+    ) -> InstructionResult {
+        self.process_instruction_with_instruction_index(instruction, accounts, 0)
+    }
+
+    pub fn process_instruction_with_instruction_index(
+        &self,
+        instruction: &Instruction,
+        accounts: &[(Pubkey, Account)],
+        instruction_index: usize,
     ) -> InstructionResult {
         let mut compute_units_consumed = 0;
         let mut timings = ExecuteTimings::default();
@@ -692,6 +702,7 @@ impl Mollusk {
             self.compute_budget.max_instruction_stack_depth,
             self.compute_budget.max_instruction_trace_length,
         );
+        transaction_context.set_top_level_instruction_index(instruction_index);
 
         let invoke_result = {
             let mut program_cache = self.program_cache.cache();
@@ -803,8 +814,12 @@ impl Mollusk {
             ..Default::default()
         };
 
-        for instruction in instructions {
-            let this_result = self.process_instruction(instruction, &result.resulting_accounts);
+        for (index, instruction) in instructions.iter().enumerate() {
+            let this_result = self.process_instruction_with_instruction_index(
+                instruction,
+                &result.resulting_accounts,
+                index,
+            );
 
             result.absorb(this_result);