diff --git a/Sources/RangeState/RangeValidator.swift b/Sources/RangeState/RangeValidator.swift
index dc390ba..b90c540 100644
--- a/Sources/RangeState/RangeValidator.swift
+++ b/Sources/RangeState/RangeValidator.swift
@@ -115,7 +115,7 @@ public final class RangeValidator<Content: VersionedContent> {
 	///     range = NSRange(1..<2)
 	///     delta = -1
 	public func contentChanged(in range: NSRange, delta: Int) {
-		let mutation = RangeMutation(range: range, delta: delta, limit: length)
+		let mutation = RangeMutation(range: range, delta: delta)
 
 		self.validSet = mutation.transform(set: validSet)
 
diff --git a/Tests/RangeStateTests/RangeValidatorTests.swift b/Tests/RangeStateTests/RangeValidatorTests.swift
index 22bec95..037afba 100644
--- a/Tests/RangeStateTests/RangeValidatorTests.swift
+++ b/Tests/RangeStateTests/RangeValidatorTests.swift
@@ -6,10 +6,14 @@ final class RangeValidatorTests: XCTestCase {
 	typealias StringValidator = RangeValidator<StringContent>
 
 	@MainActor
-	func testContentChange() {
+	func testContentChange() async {
+		let validationExp = expectation(description: "validation")
+
 		var content = StringContent(string: "abc")
 		let provider = StringValidator.ValidationProvider(
 			syncValue: {
+				validationExp.fulfill()
+
 				return .success($0.value)
 			},
 			asyncValue: { contentRange, _ in
@@ -23,8 +27,41 @@ final class RangeValidatorTests: XCTestCase {
 			)
 		)
 
-		content.string = "abcd"
+		validator.validate(.all)
+
+		await fulfillment(of: [validationExp], timeout: 1.0)
 
+		content.string = "abcd"
 		validator.contentChanged(in: NSRange(3..<3), delta: 1)
 	}
+
+	@MainActor
+	func testContentDeleted() async {
+		let validationExp = expectation(description: "validation")
+
+		var content = StringContent(string: "abc")
+		let provider = StringValidator.ValidationProvider(
+			syncValue: {
+				validationExp.fulfill()
+
+				return .success($0.value)
+			},
+			asyncValue: { contentRange, _ in
+				return .success(contentRange.value)
+			})
+
+		let validator = StringValidator(
+			configuration: .init(
+				versionedContent: content,
+				validationProvider: provider
+			)
+		)
+
+		validator.validate(.all)
+
+		await fulfillment(of: [validationExp], timeout: 1.0)
+
+		content.string = "ac"
+		validator.contentChanged(in: NSRange(1..<2), delta: -1)
+	}
 }
diff --git a/Tests/RangeStateTests/StringContent.swift b/Tests/RangeStateTests/StringContent.swift
index 036d657..66eb89d 100644
--- a/Tests/RangeStateTests/StringContent.swift
+++ b/Tests/RangeStateTests/StringContent.swift
@@ -2,7 +2,7 @@ import Foundation
 
 import RangeState
 
-struct StringContent: VersionedContent {
+final class StringContent: VersionedContent {
 	private var version: Int = 0
 	
 	var string: String {