diff --git a/src/BirdMessenger.Test/TusHeadersTest.cs b/src/BirdMessenger.Test/TusHeadersTest.cs
new file mode 100644
index 0000000..a916156
--- /dev/null
+++ b/src/BirdMessenger.Test/TusHeadersTest.cs
@@ -0,0 +1,31 @@
+using Xunit;
+
+namespace BirdMessenger.Test;
+
+public class TusHeadersTest
+{
+    [Theory]
+    [InlineData(null,false)]
+    [InlineData("",false)]
+    [InlineData(" ",false)]
+    [InlineData("test",false)]
+    [InlineData(TusHeaders.TusResumable,true)]
+    [InlineData(TusHeaders.UploadLength,true)]
+    [InlineData(TusHeaders.UploadOffset,true)]
+    [InlineData(TusHeaders.UploadMetadata,true)]
+    [InlineData(TusHeaders.Location,true)]
+    [InlineData(TusHeaders.UploadDeferLength,true)]
+    [InlineData(TusHeaders.ContentType,true)]
+    [InlineData(TusHeaders.UploadChecksum,true)]
+    [InlineData(TusHeaders.UploadConcat,true)]
+    [InlineData(TusHeaders.UploadContentTypeValue,true)]
+    [InlineData(TusHeaders.TusVersion,true)]
+    [InlineData(TusHeaders.TusMaxSize,true)]
+    [InlineData(TusHeaders.TusExtension,true)]
+    public void TestReservedWordsTest(string header, bool isReserved)
+    {
+        bool isReservedTest = TusHeaders.IsReserved(header);
+        
+        Assert.Equal(isReserved,isReservedTest);
+    }
+}
\ No newline at end of file