diff --git a/scylla-cql/src/frame/response/cql_to_rust.rs b/scylla-cql/src/frame/response/cql_to_rust.rs
index 50ba7a9386..ec66d1e98e 100644
--- a/scylla-cql/src/frame/response/cql_to_rust.rs
+++ b/scylla-cql/src/frame/response/cql_to_rust.rs
@@ -557,7 +557,7 @@ mod tests {
             .unwrap()
             .and_hms_opt(2, 0, 0)
             .unwrap();
-        let datetime_utc = DateTime::<Utc>::from_utc(naivedatetime_utc, Utc);
+        let datetime_utc = DateTime::<Utc>::from_naive_utc_and_offset(naivedatetime_utc, Utc);
 
         assert_eq!(
             datetime_utc,
diff --git a/scylla-cql/src/frame/types.rs b/scylla-cql/src/frame/types.rs
index 71b0f78205..fd2254c8b0 100644
--- a/scylla-cql/src/frame/types.rs
+++ b/scylla-cql/src/frame/types.rs
@@ -142,7 +142,7 @@ fn write_int_length(v: usize, buf: &mut impl BufMut) -> Result<(), ParseError> {
 
 #[test]
 fn type_int() {
-    let vals = vec![i32::MIN, -1, 0, 1, i32::MAX];
+    let vals = [i32::MIN, -1, 0, 1, i32::MAX];
     for val in vals.iter() {
         let mut buf = Vec::new();
         write_int(*val, &mut buf);
@@ -161,7 +161,7 @@ pub fn write_long(v: i64, buf: &mut impl BufMut) {
 
 #[test]
 fn type_long() {
-    let vals = vec![i64::MIN, -1, 0, 1, i64::MAX];
+    let vals = [i64::MIN, -1, 0, 1, i64::MAX];
     for val in vals.iter() {
         let mut buf = Vec::new();
         write_long(*val, &mut buf);
@@ -192,7 +192,7 @@ fn write_short_length(v: usize, buf: &mut impl BufMut) -> Result<(), ParseError>
 
 #[test]
 fn type_short() {
-    let vals = vec![i16::MIN, -1, 0, 1, i16::MAX];
+    let vals = [i16::MIN, -1, 0, 1, i16::MAX];
     for val in vals.iter() {
         let mut buf = Vec::new();
         write_short(*val, &mut buf);
diff --git a/scylla-cql/src/frame/value_tests.rs b/scylla-cql/src/frame/value_tests.rs
index f7e480362f..bd411f45a8 100644
--- a/scylla-cql/src/frame/value_tests.rs
+++ b/scylla-cql/src/frame/value_tests.rs
@@ -125,7 +125,7 @@ fn datetime_serialization() {
             ((*test_val % 1000) as i32 * 1_000_000) as u32,
         )
         .expect("invalid or out-of-range datetime");
-        let test_datetime = DateTime::<Utc>::from_utc(native_datetime, Utc);
+        let test_datetime = DateTime::<Utc>::from_naive_utc_and_offset(native_datetime, Utc);
         let bytes: Vec<u8> = serialized(test_datetime);
 
         let mut expected_bytes: Vec<u8> = vec![0, 0, 0, 8];
diff --git a/scylla/src/history.rs b/scylla/src/history.rs
index 6b1bd1a98f..34c2c19244 100644
--- a/scylla/src/history.rs
+++ b/scylla/src/history.rs
@@ -475,7 +475,7 @@ mod tests {
     // HistoryCollector sets the timestamp to current time which changes with each test.
     // Setting it to one makes it possible to test displaying consistently.
     fn set_one_time(mut history: StructuredHistory) -> StructuredHistory {
-        let the_time: TimePoint = DateTime::<Utc>::from_utc(
+        let the_time: TimePoint = DateTime::<Utc>::from_naive_utc_and_offset(
             NaiveDateTime::new(
                 NaiveDate::from_ymd_opt(2022, 2, 22).unwrap(),
                 NaiveTime::from_hms_opt(20, 22, 22).unwrap(),
diff --git a/scylla/src/transport/session_test.rs b/scylla/src/transport/session_test.rs
index 6bc9f0e4f1..805217053d 100644
--- a/scylla/src/transport/session_test.rs
+++ b/scylla/src/transport/session_test.rs
@@ -646,7 +646,7 @@ async fn test_use_keyspace() {
         )))
     ));
 
-    let long_name: String = vec!['a'; 49].iter().collect();
+    let long_name: String = ['a'; 49].iter().collect();
     assert!(matches!(
         session.use_keyspace(long_name, false).await,
         Err(QueryError::BadQuery(BadQuery::BadKeyspaceName(