diff --git a/source/Trek-12/Tests/testBestScore.cs b/source/Trek-12/Tests/testBestScore.cs
new file mode 100644
index 0000000..e78457a
--- /dev/null
+++ b/source/Trek-12/Tests/testBestScore.cs
@@ -0,0 +1,48 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Models;
+
+namespace Tests
+{
+    public class testBestScore
+    {
+        [Fact]
+        public void TestCstor()
+        {
+            BestScore b = new BestScore(12, 456);
+            Assert.NotNull(b);
+            Assert.Equal(12, b.GamesPlayed);
+            Assert.Equal(456, b.Score);
+        }
+
+        [Fact]
+        public void TestCstorNotEqual() 
+        {
+            BestScore b = new BestScore(15, 4656);
+            Assert.NotNull(b);
+            Assert.NotEqual(12, b.GamesPlayed);
+            Assert.NotEqual(456, b.Score);
+        }
+
+        [Fact]
+        public void TestIncr() 
+        {
+            BestScore b = new BestScore(12, 456);
+            b.IncrGamesPlayed();
+            Assert.NotNull(b);
+            Assert.Equal(13, b.GamesPlayed);
+        }
+
+        [Fact]
+        public void TestNotNegative()
+        {
+            BestScore b = new BestScore(-4, -98);
+            Assert.NotNull(b);
+            Assert.Equal(0, b.GamesPlayed);
+            Assert.Equal(0, b.Score);
+        }
+    }
+}