diff --git a/Sources/Core/Extensions/String+Empty.swift b/Sources/Core/Extensions/String+Empty.swift
index b3a599a..12636f2 100644
--- a/Sources/Core/Extensions/String+Empty.swift
+++ b/Sources/Core/Extensions/String+Empty.swift
@@ -12,17 +12,14 @@
 
 public extension String {
     
-    // MARK: Properties
+    // MARK: Constants
     
-    /// Represents an empty string.
+    /// A string that represents an empty string.
     static let empty = ""
     
-    // MARK: Functions
-    
-    /// Checks whether a string is not empty.
-    /// - Returns: A boolean value that represents whether the string is not empty.
-    func isNotEmpty() -> Bool {
-        isEmpty == false
-    }
+    // MARK: Properties
+
+    /// A Boolean value indicating whether a string is not empty.
+    var isNotEmpty: Bool { !isEmpty }
     
 }
diff --git a/Tests/Core/Cases/Extensions/String+EmptyTests.swift b/Tests/Core/Cases/Extensions/String+EmptyTests.swift
index 956abf0..23a204f 100644
--- a/Tests/Core/Cases/Extensions/String+EmptyTests.swift
+++ b/Tests/Core/Cases/Extensions/String+EmptyTests.swift
@@ -31,7 +31,7 @@ final class String_EmptyTests: XCTestCase {
         let string = String.empty
         
         // WHEN
-        let result = string.isNotEmpty()
+        let result = string.isNotEmpty
         
         // THEN
         XCTAssertFalse(result)
@@ -42,7 +42,7 @@ final class String_EmptyTests: XCTestCase {
         let string = String.Test.string
         
         // WHEN
-        let result = string.isNotEmpty()
+        let result = string.isNotEmpty
         
         // THEN
         XCTAssertTrue(result)