diff --git a/UnitTests/Tests/Utils/HashUtilTests.cs b/UnitTests/Tests/Utils/HashUtilTests.cs
new file mode 100644
index 00000000..c9a06405
--- /dev/null
+++ b/UnitTests/Tests/Utils/HashUtilTests.cs
@@ -0,0 +1,37 @@
+using Core.Utils;
+
+namespace UnitTests.Tests.Utils;
+
+[TestClass]
+public class HashUtilTests
+{
+	private readonly HashUtil _hashUtil = new();
+	
+	[TestMethod]
+	public void IsValidMongoIdTest()
+	{
+		// Invalid mongoId character
+		var ResultBadChar = _hashUtil.IsValidMongoId("677ddb67406e9918a0264bbz");
+		
+		Assert.AreEqual(
+			false, 
+			ResultBadChar,
+			"IsValidMongoId() `677ddb67406e9918a0264bbz` contains invalid char `z`, but result was true");
+		
+		// Invalid mongoId length
+		var resultBadLength = _hashUtil.IsValidMongoId("677ddb67406e9918a0264bbcc");
+		
+		Assert.AreEqual(
+			false, 
+			resultBadLength,
+			"IsValidMongoId() `677ddb67406e9918a0264bbcc` is 25 characters, but result was true");
+		
+		// Valid mongoId
+		var resultPass = _hashUtil.IsValidMongoId("677ddb67406e9918a0264bbc");
+		
+		Assert.AreEqual(
+			true, 
+			resultPass,
+			"IsValidMongoId() `677ddb67406e9918a0264bbc` is a valid mongoId, but result was false");
+	}
+}
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