diff --git a/core/src/font.rs b/core/src/font.rs
index d8c34e5a86..d7dbb498fb 100644
--- a/core/src/font.rs
+++ b/core/src/font.rs
@@ -1,5 +1,5 @@
 /// A font.
-#[derive(Debug, Clone, Copy, Default)]
+#[derive(Debug, Clone, Copy, Default, PartialEq)]
 pub enum Font {
     /// The default font.
     ///
diff --git a/graphics/src/primitive.rs b/graphics/src/primitive.rs
index cef422a2ae..827791f1eb 100644
--- a/graphics/src/primitive.rs
+++ b/graphics/src/primitive.rs
@@ -9,7 +9,7 @@ use crate::triangle;
 use std::sync::Arc;
 
 /// A rendering primitive.
-#[derive(Debug, Clone, Default)]
+#[derive(Debug, Clone, Default, PartialEq)]
 pub enum Primitive {
     /// An empty primitive
     #[default]
diff --git a/graphics/src/triangle.rs b/graphics/src/triangle.rs
index f52b2339b1..67d9807c36 100644
--- a/graphics/src/triangle.rs
+++ b/graphics/src/triangle.rs
@@ -2,7 +2,7 @@
 use bytemuck::{Pod, Zeroable};
 
 /// A set of [`Vertex2D`] and indices representing a list of triangles.
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, PartialEq)]
 pub struct Mesh2D<T> {
     /// The vertices of the mesh
     pub vertices: Vec<T>,
@@ -14,7 +14,7 @@ pub struct Mesh2D<T> {
 }
 
 /// A two-dimensional vertex.
-#[derive(Copy, Clone, Debug, Zeroable, Pod)]
+#[derive(Copy, Clone, Debug, Zeroable, Pod, PartialEq)]
 #[repr(C)]
 pub struct Vertex2D {
     /// The vertex position in 2D space.
@@ -22,7 +22,7 @@ pub struct Vertex2D {
 }
 
 /// A two-dimensional vertex with a color.
-#[derive(Copy, Clone, Debug, Zeroable, Pod)]
+#[derive(Copy, Clone, Debug, Zeroable, Pod, PartialEq)]
 #[repr(C)]
 pub struct ColoredVertex2D {
     /// The vertex position in 2D space.
diff --git a/graphics/src/widget/canvas/cache.rs b/graphics/src/widget/canvas/cache.rs
index 678b0f927b..485a93186e 100644
--- a/graphics/src/widget/canvas/cache.rs
+++ b/graphics/src/widget/canvas/cache.rs
@@ -4,7 +4,7 @@ use crate::Primitive;
 use iced_native::Size;
 use std::{cell::RefCell, sync::Arc};
 
-#[derive(Default)]
+#[derive(Default, PartialEq)]
 enum State {
     #[default]
     Empty,
@@ -18,7 +18,7 @@ enum State {
 ///
 /// A [`Cache`] will not redraw its geometry unless the dimensions of its layer
 /// change or it is explicitly cleared.
-#[derive(Debug, Default)]
+#[derive(Debug, Default, PartialEq)]
 pub struct Cache {
     state: RefCell<State>,
 }
diff --git a/graphics/src/widget/qr_code.rs b/graphics/src/widget/qr_code.rs
index 12ce5b1f90..1a251a8781 100644
--- a/graphics/src/widget/qr_code.rs
+++ b/graphics/src/widget/qr_code.rs
@@ -140,7 +140,7 @@ where
 /// The state of a [`QRCode`].
 ///
 /// It stores the data that will be displayed.
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 pub struct State {
     contents: Vec<qrcode::Color>,
     width: usize,
diff --git a/lazy/src/responsive.rs b/lazy/src/responsive.rs
index d87815f660..b5ec8814c7 100644
--- a/lazy/src/responsive.rs
+++ b/lazy/src/responsive.rs
@@ -112,6 +112,7 @@ where
     }
 }
 
+#[derive(PartialEq)]
 struct State {
     tree: RefCell<Tree>,
 }
diff --git a/native/src/image.rs b/native/src/image.rs
index 70fbade052..cde8777c0d 100644
--- a/native/src/image.rs
+++ b/native/src/image.rs
@@ -6,7 +6,7 @@ use std::path::PathBuf;
 use std::sync::Arc;
 
 /// A handle of some image data.
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub struct Handle {
     id: u64,
     data: Data,
@@ -91,6 +91,12 @@ impl Hash for Handle {
 #[derive(Clone)]
 pub struct Bytes(Arc<dyn AsRef<[u8]> + Send + Sync + 'static>);
 
+impl PartialEq for Bytes {
+    fn eq(&self, other: &Self) -> bool {
+        self.0.as_ref().as_ref() == other.0.as_ref().as_ref()
+    }
+}
+
 impl Bytes {
     /// Creates new [`Bytes`] around `data`.
     pub fn new(data: impl AsRef<[u8]> + Send + Sync + 'static) -> Self {
@@ -125,7 +131,7 @@ impl std::ops::Deref for Bytes {
 }
 
 /// The data of a raster image.
-#[derive(Clone, Hash)]
+#[derive(Clone, Hash, PartialEq)]
 pub enum Data {
     /// File data
     Path(PathBuf),
diff --git a/native/src/mouse/click.rs b/native/src/mouse/click.rs
index 4a7d796c3c..344cc46ec1 100644
--- a/native/src/mouse/click.rs
+++ b/native/src/mouse/click.rs
@@ -3,7 +3,7 @@ use crate::time::Instant;
 use crate::Point;
 
 /// A mouse click.
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Click {
     kind: Kind,
     position: Point,
@@ -11,7 +11,7 @@ pub struct Click {
 }
 
 /// The kind of mouse click.
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub enum Kind {
     /// A single click
     Single,
diff --git a/native/src/overlay/menu.rs b/native/src/overlay/menu.rs
index d93a3b5655..d105c0e52d 100644
--- a/native/src/overlay/menu.rs
+++ b/native/src/overlay/menu.rs
@@ -115,7 +115,7 @@ where
 }
 
 /// The local state of a [`Menu`].
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 pub struct State {
     tree: Tree,
 }
diff --git a/native/src/svg.rs b/native/src/svg.rs
index 9b98877a2e..38484c17d9 100644
--- a/native/src/svg.rs
+++ b/native/src/svg.rs
@@ -7,7 +7,7 @@ use std::path::PathBuf;
 use std::sync::Arc;
 
 /// A handle of Svg data.
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub struct Handle {
     id: u64,
     data: Arc<Data>,
@@ -57,7 +57,7 @@ impl Hash for Handle {
 }
 
 /// The data of a vectorial image.
-#[derive(Clone, Hash)]
+#[derive(Clone, Hash, PartialEq)]
 pub enum Data {
     /// File data
     Path(PathBuf),
diff --git a/native/src/widget/image/viewer.rs b/native/src/widget/image/viewer.rs
index 1f8d5d7a49..57ea5de6b5 100644
--- a/native/src/widget/image/viewer.rs
+++ b/native/src/widget/image/viewer.rs
@@ -336,7 +336,7 @@ where
 }
 
 /// The local state of a [`Viewer`].
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct State {
     scale: f32,
     starting_offset: Vector,
diff --git a/native/src/widget/mouse_area.rs b/native/src/widget/mouse_area.rs
index 69cfddbfde..1356318e79 100644
--- a/native/src/widget/mouse_area.rs
+++ b/native/src/widget/mouse_area.rs
@@ -68,7 +68,7 @@ impl<'a, Message, Renderer> MouseArea<'a, Message, Renderer> {
 }
 
 /// Local state of the [`MouseArea`].
-#[derive(Default)]
+#[derive(Default, PartialEq)]
 struct State {
     // TODO: Support on_mouse_enter and on_mouse_exit
 }
diff --git a/native/src/widget/scrollable.rs b/native/src/widget/scrollable.rs
index e35a4f9634..daf017f856 100644
--- a/native/src/widget/scrollable.rs
+++ b/native/src/widget/scrollable.rs
@@ -947,7 +947,7 @@ fn notify_on_scroll<Message>(
 }
 
 /// The local state of a [`Scrollable`].
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct State {
     scroll_area_touched_at: Option<Point>,
     offset_y: Offset,
@@ -982,7 +982,7 @@ impl operation::Scrollable for State {
     }
 }
 
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 enum Offset {
     Absolute(f32),
     Relative(f32),
@@ -1002,7 +1002,7 @@ impl Offset {
 }
 
 /// The current [`Viewport`] of the [`Scrollable`].
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Viewport {
     offset_x: Offset,
     offset_y: Offset,
diff --git a/native/src/widget/text_input.rs b/native/src/widget/text_input.rs
index 6113cf94c0..6cb560e862 100644
--- a/native/src/widget/text_input.rs
+++ b/native/src/widget/text_input.rs
@@ -1134,7 +1134,7 @@ pub fn mouse_interaction(
 }
 
 /// The state of a [`TextInput`].
-#[derive(Debug, Default, Clone)]
+#[derive(Debug, Default, Clone, PartialEq)]
 pub struct State {
     is_focused: Option<Focus>,
     is_dragging: bool,
@@ -1145,7 +1145,7 @@ pub struct State {
     // TODO: Add stateful horizontal scrolling offset
 }
 
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 struct Focus {
     updated_at: Instant,
     now: Instant,
diff --git a/native/src/widget/text_input/cursor.rs b/native/src/widget/text_input/cursor.rs
index 4f3b159b9d..ae9cf6ce1e 100644
--- a/native/src/widget/text_input/cursor.rs
+++ b/native/src/widget/text_input/cursor.rs
@@ -2,13 +2,13 @@
 use crate::widget::text_input::Value;
 
 /// The cursor of a text input.
-#[derive(Debug, Copy, Clone)]
+#[derive(Debug, Copy, Clone, PartialEq)]
 pub struct Cursor {
     state: State,
 }
 
 /// The state of a [`Cursor`].
-#[derive(Debug, Copy, Clone)]
+#[derive(Debug, Copy, Clone, PartialEq)]
 pub enum State {
     /// Cursor without a selection
     Index(usize),
diff --git a/native/src/widget/text_input/value.rs b/native/src/widget/text_input/value.rs
index cf4da562f4..9a57560074 100644
--- a/native/src/widget/text_input/value.rs
+++ b/native/src/widget/text_input/value.rs
@@ -4,7 +4,7 @@ use unicode_segmentation::UnicodeSegmentation;
 ///
 /// [`TextInput`]: crate::widget::TextInput
 // TODO: Reduce allocations, cache results (?)
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub struct Value {
     graphemes: Vec<String>,
 }
diff --git a/native/src/widget/tree.rs b/native/src/widget/tree.rs
index 0af40c33d9..8f4a84ae62 100644
--- a/native/src/widget/tree.rs
+++ b/native/src/widget/tree.rs
@@ -8,7 +8,7 @@ use std::fmt;
 /// A persistent state widget tree.
 ///
 /// A [`Tree`] is normally associated with a specific widget in the widget tree.
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 pub struct Tree {
     /// The tag of the [`Tree`].
     pub tag: Tag,
@@ -135,6 +135,18 @@ pub enum State {
     Some(Box<dyn Any>),
 }
 
+impl PartialEq for State {
+    fn eq(&self, other: &Self) -> bool {
+        match (self, other) {
+            (State::None, State::None) => true,
+            (State::Some(self_state), State::Some(other_state)) => {
+                self_state.downcast_ref::<Tree>() == other_state.downcast_ref::<Tree>()
+            }
+            _ => false,
+        }
+    }
+}
+
 impl State {
     /// Creates a new [`State`].
     pub fn new<T>(state: T) -> Self