diff --git a/tests/Neo.UnitTests/SmartContract/Native/UT_CryptoLib.cs b/tests/Neo.UnitTests/SmartContract/Native/UT_CryptoLib.cs
index 9c4a5eb48a..4d99b16e32 100644
--- a/tests/Neo.UnitTests/SmartContract/Native/UT_CryptoLib.cs
+++ b/tests/Neo.UnitTests/SmartContract/Native/UT_CryptoLib.cs
@@ -325,19 +325,97 @@ public void TestBls12381ScalarMul_Compat()
             );
         }
 
+        /// <summary>
+        /// Keccak256 cases are verified in https://emn178.github.io/online-tools/keccak_256.html
+        /// </summary>
         [TestMethod]
-        public void TestKeccak256()
+        public void TestKeccak256_HelloWorld()
         {
             // Arrange
-            byte[] inputData = "Hello, Keccak!"u8.ToArray();
-            string expectedHashHex = "49222c3dd1a2b5cf30a8720050c31844dbc8eca466595b5ce9c11932b7aac985";
+            byte[] inputData = "Hello, World!"u8.ToArray();
+            string expectedHashHex = "acaf3289d7b601cbd114fb36c4d29c85bbfd5e133f14cb355c3fd8d99367964f";
 
             // Act
             byte[] outputData = CryptoLib.Keccak256(inputData);
             string outputHashHex = Hex.ToHexString(outputData);
 
             // Assert
-            Assert.AreEqual(expectedHashHex, outputHashHex, "Keccak256 hash did not match expected value.");
+            Assert.AreEqual(expectedHashHex, outputHashHex, "Keccak256 hash did not match expected value for 'Hello, World!'.");
         }
+        [TestMethod]
+        public void TestKeccak256_Keccak()
+        {
+            // Arrange
+            byte[] inputData = "Keccak"u8.ToArray();
+            string expectedHashHex = "868c016b666c7d3698636ee1bd023f3f065621514ab61bf26f062c175fdbe7f2";
+
+            // Act
+            byte[] outputData = CryptoLib.Keccak256(inputData);
+            string outputHashHex = Hex.ToHexString(outputData);
+
+            // Assert
+            Assert.AreEqual(expectedHashHex, outputHashHex, "Keccak256 hash did not match expected value for 'Keccak'.");
+        }
+
+        [TestMethod]
+        public void TestKeccak256_Cryptography()
+        {
+            // Arrange
+            byte[] inputData = "Cryptography"u8.ToArray();
+            string expectedHashHex = "53d49d225dd2cfe77d8c5e2112bcc9efe77bea1c7aa5e5ede5798a36e99e2d29";
+
+            // Act
+            byte[] outputData = CryptoLib.Keccak256(inputData);
+            string outputHashHex = Hex.ToHexString(outputData);
+
+            // Assert
+            Assert.AreEqual(expectedHashHex, outputHashHex, "Keccak256 hash did not match expected value for 'Cryptography'.");
+        }
+
+        [TestMethod]
+        public void TestKeccak256_Testing123()
+        {
+            // Arrange
+            byte[] inputData = "Testing123"u8.ToArray();
+            string expectedHashHex = "3f82db7b16b0818a1c6b2c6152e265f682d5ebcf497c9aad776ad38bc39cb6ca";
+
+            // Act
+            byte[] outputData = CryptoLib.Keccak256(inputData);
+            string outputHashHex = Hex.ToHexString(outputData);
+
+            // Assert
+            Assert.AreEqual(expectedHashHex, outputHashHex, "Keccak256 hash did not match expected value for 'Testing123'.");
+        }
+
+        [TestMethod]
+        public void TestKeccak256_LongString()
+        {
+            // Arrange
+            byte[] inputData = "This is a longer string for Keccak256 testing purposes."u8.ToArray();
+            string expectedHashHex = "24115e5c2359f85f6840b42acd2f7ea47bc239583e576d766fa173bf711bdd2f";
+
+            // Act
+            byte[] outputData = CryptoLib.Keccak256(inputData);
+            string outputHashHex = Hex.ToHexString(outputData);
+
+            // Assert
+            Assert.AreEqual(expectedHashHex, outputHashHex, "Keccak256 hash did not match expected value for the longer string.");
+        }
+
+        [TestMethod]
+        public void TestKeccak256_BlankString()
+        {
+            // Arrange
+            byte[] inputData = ""u8.ToArray();
+            string expectedHashHex = "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470";
+
+            // Act
+            byte[] outputData = CryptoLib.Keccak256(inputData);
+            string outputHashHex = Hex.ToHexString(outputData);
+
+            // Assert
+            Assert.AreEqual(expectedHashHex, outputHashHex, "Keccak256 hash did not match expected value for blank string.");
+        }
+
     }
 }