diff --git a/postgres-openssl/src/lib.rs b/postgres-openssl/src/lib.rs
index 49fc2807..9fc50b89 100644
--- a/postgres-openssl/src/lib.rs
+++ b/postgres-openssl/src/lib.rs
@@ -73,6 +73,8 @@ use tokio_postgres::tls::{ChannelBinding, TlsConnect};
 #[cfg(test)]
 mod test;
 
+type ConfigCallback = dyn Fn(&mut ConnectConfiguration, &str) -> Result<(), ErrorStack> + Sync + Send;
+
 /// A `MakeTlsConnect` implementation using the `openssl` crate.
 ///
 /// Requires the `runtime` Cargo feature (enabled by default).
@@ -80,7 +82,7 @@ mod test;
 #[derive(Clone)]
 pub struct MakeTlsConnector {
     connector: SslConnector,
-    config: Arc<dyn Fn(&mut ConnectConfiguration, &str) -> Result<(), ErrorStack> + Sync + Send>,
+    config: Arc<ConfigCallback>,
 }
 
 #[cfg(feature = "runtime")]
diff --git a/postgres-types/src/special.rs b/postgres-types/src/special.rs
index 8579885e..1a865287 100644
--- a/postgres-types/src/special.rs
+++ b/postgres-types/src/special.rs
@@ -6,7 +6,7 @@ use std::{i32, i64};
 use crate::{FromSql, IsNull, ToSql, Type};
 
 /// A wrapper that can be used to represent infinity with `Type::Date` types.
-#[derive(Debug, Clone, Copy, PartialEq)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum Date<T> {
     /// Represents `infinity`, a date that is later than all other dates.
     PosInfinity,
@@ -55,7 +55,7 @@ impl<T: ToSql> ToSql for Date<T> {
 
 /// A wrapper that can be used to represent infinity with `Type::Timestamp` and `Type::Timestamptz`
 /// types.
-#[derive(Debug, Clone, Copy, PartialEq)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum Timestamp<T> {
     /// Represents `infinity`, a timestamp that is later than all other timestamps.
     PosInfinity,
diff --git a/tokio-postgres/src/config.rs b/tokio-postgres/src/config.rs
index c026cca4..2c29d629 100644
--- a/tokio-postgres/src/config.rs
+++ b/tokio-postgres/src/config.rs
@@ -23,7 +23,7 @@ use std::{error, fmt, iter, mem};
 use tokio::io::{AsyncRead, AsyncWrite};
 
 /// Properties required of a session.
-#[derive(Debug, Copy, Clone, PartialEq)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[non_exhaustive]
 pub enum TargetSessionAttrs {
     /// No special properties are required.
@@ -33,7 +33,7 @@ pub enum TargetSessionAttrs {
 }
 
 /// TLS configuration.
-#[derive(Debug, Copy, Clone, PartialEq)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[non_exhaustive]
 pub enum SslMode {
     /// Do not use TLS.
@@ -45,7 +45,7 @@ pub enum SslMode {
 }
 
 /// Channel binding configuration.
-#[derive(Debug, Copy, Clone, PartialEq)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq)]
 #[non_exhaustive]
 pub enum ChannelBinding {
     /// Do not use channel binding.
@@ -57,7 +57,7 @@ pub enum ChannelBinding {
 }
 
 /// A host specification.
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone, PartialEq, Eq)]
 pub enum Host {
     /// A TCP hostname.
     Tcp(String),
@@ -144,7 +144,7 @@ pub enum Host {
 /// ```not_rust
 /// postgresql:///mydb?user=user&host=/var/lib/postgresql
 /// ```
-#[derive(PartialEq, Clone)]
+#[derive(Clone, PartialEq, Eq)]
 pub struct Config {
     pub(crate) user: Option<String>,
     pub(crate) password: Option<Vec<u8>>,
@@ -452,7 +452,7 @@ impl Config {
                 }
             }
             "target_session_attrs" => {
-                let target_session_attrs = match &*value {
+                let target_session_attrs = match value {
                     "any" => TargetSessionAttrs::Any,
                     "read-write" => TargetSessionAttrs::ReadWrite,
                     _ => {
@@ -900,7 +900,7 @@ impl<'a> UrlParser<'a> {
     #[cfg(unix)]
     fn host_param(&mut self, s: &str) -> Result<(), Error> {
         let decoded = Cow::from(percent_encoding::percent_decode(s.as_bytes()));
-        if decoded.get(0) == Some(&b'/') {
+        if decoded.first() == Some(&b'/') {
             self.config.host_path(OsStr::from_bytes(&decoded));
         } else {
             let decoded = str::from_utf8(&decoded).map_err(|e| Error::config_parse(Box::new(e)))?;
diff --git a/tokio-postgres/src/connect.rs b/tokio-postgres/src/connect.rs
index 4336f90b..88faafe6 100644
--- a/tokio-postgres/src/connect.rs
+++ b/tokio-postgres/src/connect.rs
@@ -28,7 +28,7 @@ where
         let port = config
             .port
             .get(i)
-            .or_else(|| config.port.get(0))
+            .or_else(|| config.port.first())
             .copied()
             .unwrap_or(5432);