diff --git a/programs/budget_api/src/budget_processor.rs b/programs/budget_api/src/budget_processor.rs
index 38c4d6486..1574058d5 100644
--- a/programs/budget_api/src/budget_processor.rs
+++ b/programs/budget_api/src/budget_processor.rs
@@ -167,7 +167,8 @@ mod tests {
         let alice_pubkey = alice_client.pubkey();
         let bob_pubkey = Keypair::new().pubkey();
         let instructions = BudgetInstruction::new_payment(&alice_pubkey, &bob_pubkey, 100);
-        alice_client.process_instructions(instructions).unwrap();
+        let message = Message::new(instructions);
+        alice_client.process_message(message).unwrap();
         assert_eq!(bank.get_balance(&bob_pubkey), 100);
     }
 
@@ -189,7 +190,8 @@ mod tests {
             None,
             1,
         );
-        alice_client.process_instructions(instructions).unwrap();
+        let message = Message::new(instructions);
+        alice_client.process_message(message).unwrap();
 
         // Attack! Part 1: Sign a witness transaction with a random key.
         let mallory_client = BankClient::new(&bank, Keypair::new());
@@ -232,7 +234,8 @@ mod tests {
             None,
             1,
         );
-        alice_client.process_instructions(instructions).unwrap();
+        let message = Message::new(instructions);
+        alice_client.process_message(message).unwrap();
 
         // Attack! Part 1: Sign a timestamp transaction with a random key.
         let mallory_client = BankClient::new(&bank, Keypair::new());
@@ -278,7 +281,8 @@ mod tests {
             None,
             1,
         );
-        alice_client.process_instructions(instructions).unwrap();
+        let message = Message::new(instructions);
+        alice_client.process_message(message).unwrap();
         assert_eq!(bank.get_balance(&alice_pubkey), 1);
         assert_eq!(bank.get_balance(&budget_pubkey), 1);
 
@@ -337,7 +341,8 @@ mod tests {
             Some(alice_pubkey),
             1,
         );
-        alice_client.process_instructions(instructions).unwrap();
+        let message = Message::new(instructions);
+        alice_client.process_message(message).unwrap();
         assert_eq!(bank.get_balance(&alice_pubkey), 2);
         assert_eq!(bank.get_balance(&budget_pubkey), 1);
 
diff --git a/programs/vote_api/src/vote_processor.rs b/programs/vote_api/src/vote_processor.rs
index 03bf66008..77e3fcebc 100644
--- a/programs/vote_api/src/vote_processor.rs
+++ b/programs/vote_api/src/vote_processor.rs
@@ -51,6 +51,7 @@ mod tests {
     use solana_runtime::bank_client::BankClient;
     use solana_sdk::genesis_block::GenesisBlock;
     use solana_sdk::instruction::{AccountMeta, Instruction, InstructionError};
+    use solana_sdk::message::Message;
     use solana_sdk::pubkey::Pubkey;
     use solana_sdk::signature::{Keypair, KeypairUtil};
     use solana_sdk::system_instruction::SystemInstruction;
@@ -69,7 +70,8 @@ mod tests {
         lamports: u64,
     ) -> Result<()> {
         let ixs = VoteInstruction::new_account(&bank_client.pubkey(), vote_id, lamports);
-        bank_client.process_instructions(ixs)
+        let message = Message::new(ixs);
+        bank_client.process_message(message)
     }
 
     fn create_vote_account_with_delegate(
@@ -81,7 +83,8 @@ mod tests {
         let mut ixs = VoteInstruction::new_account(&bank_client.pubkey(), &vote_id, lamports);
         let delegate_ix = VoteInstruction::new_delegate_stake(&vote_id, delegate_id);
         ixs.push(delegate_ix);
-        bank_client.process_instructions(ixs)
+        let message = Message::new(ixs);
+        bank_client.process_message(message)
     }
 
     fn submit_vote(
@@ -142,7 +145,8 @@ mod tests {
         // the 0th account in the second instruction is not! The program
         // needs to check that it's signed.
         let move_ix = SystemInstruction::new_move(&mallory_id, &vote_id, 1);
-        let result = mallory_client.process_instructions(vec![move_ix, vote_ix]);
+        let message = Message::new(vec![move_ix, vote_ix]);
+        let result = mallory_client.process_message(message);
 
         // And ensure there's no vote.
         let vote_account = bank.get_account(&vote_id).unwrap();
diff --git a/runtime/src/bank_client.rs b/runtime/src/bank_client.rs
index 9cb732f6e..aafab55b8 100644
--- a/runtime/src/bank_client.rs
+++ b/runtime/src/bank_client.rs
@@ -36,17 +36,10 @@ impl<'a> BankClient<'a> {
         self.bank.process_transaction(&transaction)
     }
 
-    /// Create and process a transaction from a list of instructions.
-    pub fn process_instructions(
-        &self,
-        instructions: Vec<Instruction>,
-    ) -> Result<(), TransactionError> {
-        self.process_message(Message::new(instructions))
-    }
-
     /// Create and process a transaction from a single instruction.
     pub fn process_instruction(&self, instruction: Instruction) -> Result<(), TransactionError> {
-        self.process_instructions(vec![instruction])
+        let message = Message::new(vec![instruction]);
+        self.process_message(message)
     }
 
     /// Transfer lamports to pubkey