diff --git a/Sources/Defaults/Observation.swift b/Sources/Defaults/Observation.swift
index 38c1983..bc3fba4 100644
--- a/Sources/Defaults/Observation.swift
+++ b/Sources/Defaults/Observation.swift
@@ -1,6 +1,5 @@
 import Foundation
 
-/// TODO: Nest this inside `Defaults` if Swift ever supported nested protocols.
 public protocol DefaultsObservation: AnyObject {
 	func invalidate()
 
@@ -26,6 +25,8 @@ public protocol DefaultsObservation: AnyObject {
 }
 
 extension Defaults {
+	public typealias Observation = DefaultsObservation
+
 	private static func deserialize<Value: Decodable>(_ value: Any?, to type: Value.Type) -> Value? {
 		guard
 			let value = value,
@@ -130,7 +131,7 @@ extension Defaults {
 		}
 	}
 
-	final class UserDefaultsKeyObservation: NSObject, DefaultsObservation {
+	final class UserDefaultsKeyObservation: NSObject, Defaults.Observation {
 		typealias Callback = (BaseChange) -> Void
 
 		private weak var object: UserDefaults?
@@ -212,7 +213,7 @@ extension Defaults {
 		_ key: Defaults.Key<Value>,
 		options: NSKeyValueObservingOptions = [.initial, .old, .new],
 		handler: @escaping (KeyChange<Value>) -> Void
-	) -> DefaultsObservation {
+	) -> Defaults.Observation {
 		let observation = UserDefaultsKeyObservation(object: key.suite, key: key.name) { change in
 			handler(
 				KeyChange<Value>(change: change, defaultValue: key.defaultValue)
@@ -230,7 +231,7 @@ extension Defaults {
 		_ key: Defaults.NSSecureCodingKey<Value>,
 		options: NSKeyValueObservingOptions = [.initial, .old, .new],
 		handler: @escaping (NSSecureCodingKeyChange<Value>) -> Void
-	) -> DefaultsObservation {
+	) -> Defaults.Observation {
 		let observation = UserDefaultsKeyObservation(object: key.suite, key: key.name) { change in
 			handler(
 				NSSecureCodingKeyChange<Value>(change: change, defaultValue: key.defaultValue)
@@ -248,7 +249,7 @@ extension Defaults {
 		_ key: Defaults.NSSecureCodingOptionalKey<Value>,
 		options: NSKeyValueObservingOptions = [.initial, .old, .new],
 		handler: @escaping (NSSecureCodingOptionalKeyChange<Value>) -> Void
-	) -> DefaultsObservation {
+	) -> Defaults.Observation {
 		let observation = UserDefaultsKeyObservation(object: key.suite, key: key.name) { change in
 			handler(
 				NSSecureCodingOptionalKeyChange<Value>(change: change)
diff --git a/Tests/DefaultsTests/DefaultsTests.swift b/Tests/DefaultsTests/DefaultsTests.swift
index 6cebcf4..9794e84 100644
--- a/Tests/DefaultsTests/DefaultsTests.swift
+++ b/Tests/DefaultsTests/DefaultsTests.swift
@@ -406,7 +406,7 @@ final class DefaultsTests: XCTestCase {
 		let key = Defaults.Key<Bool>("observeKey", default: false)
 		let expect = expectation(description: "Observation closure being called")
 
-		var observation: DefaultsObservation!
+		var observation: Defaults.Observation!
 		observation = Defaults.observe(key, options: [.old, .new]) { change in
 			XCTAssertFalse(change.oldValue)
 			XCTAssertTrue(change.newValue)
@@ -424,7 +424,7 @@ final class DefaultsTests: XCTestCase {
 		let key = Defaults.NSSecureCodingKey<ExamplePersistentHistory>("observeNSSecureCodingKey", default: ExamplePersistentHistory(value: "TestValue"))
 		let expect = expectation(description: "Observation closure being called")
 
-		var observation: DefaultsObservation!
+		var observation: Defaults.Observation!
 		observation = Defaults.observe(key, options: [.old, .new]) { change in
 			XCTAssertEqual(change.oldValue.value, "TestValue")
 			XCTAssertEqual(change.newValue.value, "NewTestValue")
@@ -441,7 +441,7 @@ final class DefaultsTests: XCTestCase {
 		let key = Defaults.Key<Bool?>("observeOptionalKey")
 		let expect = expectation(description: "Observation closure being called")
 
-		var observation: DefaultsObservation!
+		var observation: Defaults.Observation!
 		observation = Defaults.observe(key, options: [.old, .new]) { change in
 			XCTAssertNil(change.oldValue)
 			XCTAssertTrue(change.newValue!)
@@ -459,7 +459,7 @@ final class DefaultsTests: XCTestCase {
 		let key = Defaults.NSSecureCodingOptionalKey<ExamplePersistentHistory>("observeNSSecureCodingOptionalKey")
 		let expect = expectation(description: "Observation closure being called")
 
-		var observation: DefaultsObservation!
+		var observation: Defaults.Observation!
 		observation = Defaults.observe(key, options: [.old, .new]) { change in
 			XCTAssertNil(change.oldValue)
 			XCTAssertEqual(change.newValue?.value, "NewOptionalValue")
@@ -478,7 +478,7 @@ final class DefaultsTests: XCTestCase {
 		let key = Defaults.Key<URL>("observeKeyURL", default: fixtureURL)
 		let expect = expectation(description: "Observation closure being called")
 
-		var observation: DefaultsObservation!
+		var observation: Defaults.Observation!
 		observation = Defaults.observe(key, options: [.old, .new]) { change in
 			XCTAssertEqual(change.oldValue, fixtureURL)
 			XCTAssertEqual(change.newValue, fixtureURL2)
@@ -495,7 +495,7 @@ final class DefaultsTests: XCTestCase {
 		let key = Defaults.Key<FixtureEnum>("observeKeyEnum", default: .oneHour)
 		let expect = expectation(description: "Observation closure being called")
 
-		var observation: DefaultsObservation!
+		var observation: Defaults.Observation!
 		observation = Defaults.observe(key, options: [.old, .new]) { change in
 			XCTAssertEqual(change.oldValue, .oneHour)
 			XCTAssertEqual(change.newValue, .tenMinutes)
@@ -591,7 +591,7 @@ final class DefaultsTests: XCTestCase {
 		let key = Defaults.Key<Bool>("lifetimeTie", default: false)
 		let expect = expectation(description: "Observation closure being called")
 
-		weak var observation: DefaultsObservation!
+		weak var observation: Defaults.Observation!
 		observation = Defaults.observe(key, options: []) { change in
 			observation.invalidate()
 			expect.fulfill()
@@ -605,7 +605,7 @@ final class DefaultsTests: XCTestCase {
 	func testObserveWithLifetimeTieManualBreak() {
 		let key = Defaults.Key<Bool>("lifetimeTieManualBreak", default: false)
 
-		weak var observation: DefaultsObservation? = Defaults.observe(key, options: []) { _ in }.tieToLifetime(of: self)
+		weak var observation: Defaults.Observation? = Defaults.observe(key, options: []) { _ in }.tieToLifetime(of: self)
 		observation!.removeLifetimeTie()
 
 		for i in 1...10 {
diff --git a/readme.md b/readme.md
index e158a8a..043c492 100644
--- a/readme.md
+++ b/readme.md
@@ -341,7 +341,7 @@ Defaults.observe<T: Codable>(
 	_ key: Defaults.Key<T>,
 	options: NSKeyValueObservingOptions = [.initial, .old, .new],
 	handler: @escaping (KeyChange<T>) -> Void
-) -> DefaultsObservation
+) -> Defaults.Observation
 ```
 
 ```swift
@@ -349,7 +349,7 @@ Defaults.observe<T: NSSecureCoding>(
 	_ key: Defaults.NSSecureCodingKey<T>,
 	options: NSKeyValueObservingOptions = [.initial, .old, .new],
 	handler: @escaping (NSSecureCodingKeyChange<T>) -> Void
-) -> DefaultsObservation
+) -> Defaults.Observation
 ```
 
 ```swift
@@ -357,7 +357,7 @@ Defaults.observe<T: NSSecureCoding>(
 	_ key: Defaults.NSSecureCodingOptionalKey<T>,
 	options: NSKeyValueObservingOptions = [.initial, .old, .new],
 	handler: @escaping (NSSecureCodingOptionalKeyChange<T>) -> Void
-) -> DefaultsObservation
+) -> Defaults.Observation
 ```
 
 Type: `func`
@@ -446,27 +446,27 @@ Type: `func`
 
 Remove all entries from the `UserDefaults` suite.
 
-### `DefaultsObservation`
+### `Defaults.Observation`
 
 Type: `protocol`
 
 Represents an observation of a defaults key.
 
-#### `DefaultsObservation.invalidate`
+#### `Defaults.Observation#invalidate`
 
 ```swift
-DefaultsObservation.invalidate()
+Defaults.Observation#invalidate()
 ```
 
 Type: `func`
 
 Invalidate the observation.
 
-#### `DefaultsObservation.tieToLifetime`
+#### `Defaults.Observation#tieToLifetime`
 
 ```swift
 @discardableResult
-DefaultsObservation.tieToLifetime(of weaklyHeldObject: AnyObject) -> Self
+Defaults.Observation#tieToLifetime(of weaklyHeldObject: AnyObject) -> Self
 ```
 
 Type: `func`
@@ -475,10 +475,10 @@ Keep the observation alive for as long as, and no longer than, another object ex
 
 When `weaklyHeldObject` is deinitialized, the observation is invalidated automatically.
 
-#### `DefaultsObservation.removeLifetimeTie`
+#### `Defaults.Observation.removeLifetimeTie`
 
 ```swift
-DefaultsObservation.removeLifetimeTie()
+Defaults.Observation#removeLifetimeTie()
 ```
 
 Type: `func`