diff --git a/contracts/burner/src/contract.rs b/contracts/burner/src/contract.rs
index d6a96a0e08..06332db0d7 100644
--- a/contracts/burner/src/contract.rs
+++ b/contracts/burner/src/contract.rs
@@ -127,7 +127,7 @@ mod tests {
         let res = migrate(deps.as_mut(), mock_env(), msg).unwrap();
         // check payout
         assert_eq!(1, res.messages.len());
-        let msg = res.messages.get(0).expect("no message");
+        let msg = res.messages.first().expect("no message");
         assert_eq!(
             msg,
             &SubMsg::new(BankMsg::Send {
diff --git a/contracts/burner/tests/integration.rs b/contracts/burner/tests/integration.rs
index c783a6fa3c..a72a3f6fb2 100644
--- a/contracts/burner/tests/integration.rs
+++ b/contracts/burner/tests/integration.rs
@@ -67,7 +67,7 @@ fn migrate_sends_funds() {
     let res: Response = migrate(&mut deps, mock_env(), msg).unwrap();
     // check payout
     assert_eq!(1, res.messages.len());
-    let msg = res.messages.get(0).expect("no message");
+    let msg = res.messages.first().expect("no message");
     assert_eq!(
         msg,
         &SubMsg::new(BankMsg::Send {
diff --git a/contracts/hackatom/src/contract.rs b/contracts/hackatom/src/contract.rs
index f62ffcb319..a78c21db37 100644
--- a/contracts/hackatom/src/contract.rs
+++ b/contracts/hackatom/src/contract.rs
@@ -416,7 +416,7 @@ mod tests {
         };
         let res = sudo(deps.as_mut(), mock_env(), sys_msg).unwrap();
         assert_eq!(1, res.messages.len());
-        let msg = res.messages.get(0).expect("no message");
+        let msg = res.messages.first().expect("no message");
         assert_eq!(msg, &SubMsg::new(BankMsg::Send { to_address, amount }));
     }
 
@@ -466,7 +466,7 @@ mod tests {
         )
         .unwrap();
         assert_eq!(execute_res.messages.len(), 1);
-        let msg = execute_res.messages.get(0).expect("no message");
+        let msg = execute_res.messages.first().expect("no message");
         assert_eq!(
             msg,
             &SubMsg::new(BankMsg::Send {
diff --git a/contracts/hackatom/tests/integration.rs b/contracts/hackatom/tests/integration.rs
index 890309ffd6..6d16eeeef8 100644
--- a/contracts/hackatom/tests/integration.rs
+++ b/contracts/hackatom/tests/integration.rs
@@ -170,7 +170,7 @@ fn sudo_can_steal_tokens() {
     };
     let res: Response = sudo(&mut deps, mock_env(), sys_msg).unwrap();
     assert_eq!(1, res.messages.len());
-    let msg = res.messages.get(0).expect("no message");
+    let msg = res.messages.first().expect("no message");
     assert_eq!(msg, &SubMsg::new(BankMsg::Send { to_address, amount }));
 }
 
@@ -237,7 +237,7 @@ fn execute_release_works() {
     let execute_res: Response =
         execute(&mut deps, mock_env(), execute_info, ExecuteMsg::Release {}).unwrap();
     assert_eq!(execute_res.messages.len(), 1);
-    let msg = execute_res.messages.get(0).expect("no message");
+    let msg = execute_res.messages.first().expect("no message");
     assert_eq!(
         msg,
         &SubMsg::new(BankMsg::Send {
diff --git a/contracts/staking/src/contract.rs b/contracts/staking/src/contract.rs
index 72b20818e6..88fe864157 100644
--- a/contracts/staking/src/contract.rs
+++ b/contracts/staking/src/contract.rs
@@ -322,13 +322,14 @@ pub fn _bond_all_tokens(
 
     // we deduct pending claims from our account balance before reinvesting.
     // if there is not enough funds, we just return a no-op
-    match update_item(deps.storage, KEY_TOTAL_SUPPLY, |mut supply: Supply| {
+    let updated = update_item(deps.storage, KEY_TOTAL_SUPPLY, |mut supply: Supply| {
         balance.amount = balance.amount.checked_sub(supply.claims)?;
         // this just triggers the "no op" case if we don't have min_withdrawal left to reinvest
         balance.amount.checked_sub(invest.min_withdrawal)?;
         supply.bonded += balance.amount;
         Ok(supply)
-    }) {
+    });
+    match updated {
         Ok(_) => {}
         // if it is below the minimum, we do a no-op (do not revert other state from withdrawal)
         Err(StdError::Overflow { .. }) => return Ok(Response::default()),
diff --git a/packages/std/src/errors/std_error.rs b/packages/std/src/errors/std_error.rs
index 60a8a8dc0a..b8293e3f28 100644
--- a/packages/std/src/errors/std_error.rs
+++ b/packages/std/src/errors/std_error.rs
@@ -877,8 +877,8 @@ mod tests {
 
     #[test]
     fn from_std_str_utf8error_works() {
-        let broken = b"Hello \xF0\x90\x80World";
-        let error: StdError = str::from_utf8(broken).unwrap_err().into();
+        let broken = Vec::from(b"Hello \xF0\x90\x80World" as &[u8]);
+        let error: StdError = str::from_utf8(&broken).unwrap_err().into();
         match error {
             StdError::InvalidUtf8 { msg, .. } => {
                 assert_eq!(msg, "invalid utf-8 sequence of 3 bytes from index 6")
diff --git a/packages/std/src/testing/assertions.rs b/packages/std/src/testing/assertions.rs
index d6ffecff0d..694c71752f 100644
--- a/packages/std/src/testing/assertions.rs
+++ b/packages/std/src/testing/assertions.rs
@@ -169,6 +169,7 @@ mod tests {
     )]
     fn assert_approx_with_custom_panic_msg() {
         let adjective = "extra";
+        #[allow(dead_code)]
         #[derive(Debug)]
         struct Foo(u32);
         assert_approx_eq!(
diff --git a/packages/vm/src/cache.rs b/packages/vm/src/cache.rs
index 6686ce070b..0a14b24acc 100644
--- a/packages/vm/src/cache.rs
+++ b/packages/vm/src/cache.rs
@@ -469,6 +469,7 @@ fn save_wasm_to_disk(dir: impl Into<PathBuf>, wasm: &[u8]) -> VmResult<Checksum>
     let mut file = OpenOptions::new()
         .write(true)
         .create(true)
+        .truncate(true)
         .open(filepath)
         .map_err(|e| VmError::cache_err(format!("Error opening Wasm file for writing: {e}")))?;
     file.write_all(wasm)