diff --git a/src/entities/account.rs b/src/entities/account.rs
index 8cfa9a6..ba6f993 100644
--- a/src/entities/account.rs
+++ b/src/entities/account.rs
@@ -82,6 +82,7 @@ fn string_or_bool<'de, D: Deserializer<'de>>(val: D) -> ::std::result::Result<bo
     })
 }
 
+#[derive(Debug)]
 pub struct CredentialsBuilder<'a> {
     display_name: Option<&'a str>,
     note: Option<&'a str>,
diff --git a/src/entities/instance.rs b/src/entities/instance.rs
index 682cc87..0b1ce00 100644
--- a/src/entities/instance.rs
+++ b/src/entities/instance.rs
@@ -37,7 +37,7 @@ pub struct StreamingApi {
 }
 
 /// Statistics about the Mastodon instance.
-#[derive(Debug, Clone, Deserialize)]
+#[derive(Debug, Clone, Copy, Deserialize)]
 pub struct Stats {
     user_count: u64,
     status_count: u64,
diff --git a/src/entities/itemsiter.rs b/src/entities/itemsiter.rs
index 648f844..96cd20e 100644
--- a/src/entities/itemsiter.rs
+++ b/src/entities/itemsiter.rs
@@ -24,6 +24,7 @@ use serde::Deserialize;
 /// # Ok(())
 /// # }
 /// ```
+#[derive(Debug, Clone)]
 pub(crate) struct ItemsIter<'a, T: Clone + for<'de> Deserialize<'de>, H: 'a + HttpSend> {
     page: Page<'a, T, H>,
     buffer: Vec<T>,
diff --git a/src/entities/mention.rs b/src/entities/mention.rs
index 479a691..4f1126d 100644
--- a/src/entities/mention.rs
+++ b/src/entities/mention.rs
@@ -1,3 +1,4 @@
+#[derive(Debug, Clone)]
 pub struct Mention {
     /// URL of user's profile (can be remote)
     pub url: String,
diff --git a/src/entities/mod.rs b/src/entities/mod.rs
index 3d44f87..f7edd2a 100644
--- a/src/entities/mod.rs
+++ b/src/entities/mod.rs
@@ -13,7 +13,7 @@ pub mod search_result;
 pub mod status;
 
 /// An empty JSON object.
-#[derive(Deserialize)]
+#[derive(Deserialize, Debug, Copy, Clone, PartialEq)]
 pub struct Empty {}
 
 pub mod prelude {
diff --git a/src/entities/notification.rs b/src/entities/notification.rs
index 1fbd919..8f7759b 100644
--- a/src/entities/notification.rs
+++ b/src/entities/notification.rs
@@ -20,18 +20,15 @@ pub struct Notification {
 }
 
 /// The type of notification.
-#[derive(Debug, Clone, Deserialize)]
+#[derive(Debug, Clone, Copy, Deserialize)]
+#[serde(rename_all = "lowercase")]
 pub enum NotificationType {
     /// Someone mentioned the application client in another status.
-    #[serde(rename = "mention")]
     Mention,
     /// Someone reblogged one of the application client's statuses.
-    #[serde(rename = "reblog")]
     Reblog,
     /// Someone favourited one of the application client's statuses.
-    #[serde(rename = "favourite")]
     Favourite,
     /// Someone followed the application client.
-    #[serde(rename = "follow")]
     Follow,
 }
diff --git a/src/http_send.rs b/src/http_send.rs
index 56c69ef..52f0704 100644
--- a/src/http_send.rs
+++ b/src/http_send.rs
@@ -1,7 +1,8 @@
 use reqwest::{Client, Request, RequestBuilder, Response};
+use std::fmt::Debug;
 use Result;
 
-pub trait HttpSend: Clone {
+pub trait HttpSend: Clone + Debug {
     fn execute(&self, client: &Client, request: Request) -> Result<Response>;
     fn send(&self, client: &Client, builder: &mut RequestBuilder) -> Result<Response> {
         let request = builder.build()?;
@@ -9,7 +10,7 @@ pub trait HttpSend: Clone {
     }
 }
 
-#[derive(Clone)]
+#[derive(Clone, Copy, Debug, PartialEq)]
 pub struct HttpSender;
 
 impl HttpSend for HttpSender {
diff --git a/src/lib.rs b/src/lib.rs
index b7b9770..6297d2d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -25,7 +25,17 @@
 //! # }
 //! ```
 
-#![cfg_attr(test, deny(warnings))]
+#![deny(
+    warnings,
+    missing_debug_implementations,
+    missing_copy_implementations,
+    trivial_casts,
+    trivial_numeric_casts,
+    unsafe_code,
+    unstable_features,
+    unused_import_braces,
+    unused_qualifications
+)]
 #![cfg_attr(test, deny(missing_docs))]
 
 #[macro_use]
diff --git a/src/page.rs b/src/page.rs
index 5df4f99..d9f1b43 100644
--- a/src/page.rs
+++ b/src/page.rs
@@ -9,6 +9,7 @@ use url::Url;
 
 use http_send::HttpSend;
 
+#[derive(Debug, Clone)]
 pub struct Page<'a, T: for<'de> Deserialize<'de>, H: 'a + HttpSend> {
     mastodon: &'a Mastodon<H>,
     next: Option<Url>,
diff --git a/src/registration.rs b/src/registration.rs
index 68f0498..647ddbf 100644
--- a/src/registration.rs
+++ b/src/registration.rs
@@ -15,6 +15,7 @@ const DEFAULT_REDIRECT_URI: &'static str = "urn:ietf:wg:oauth:2.0:oob";
 
 /// Handles registering your mastodon app to your instance. It is recommended
 /// you cache your data struct to avoid registering on every run.
+#[derive(Debug, Clone)]
 pub struct Registration<'a, H: HttpSend = HttpSender> {
     base: String,
     client: Client,
@@ -215,6 +216,7 @@ impl<H: HttpSend> Registered<H> {
     }
 }
 
+#[derive(Debug, Clone)]
 pub struct Registered<H: HttpSend> {
     base: String,
     client: Client,