diff --git a/.Lib9c.Tests/Action/Common/TestRandom.cs b/.Lib9c.Tests/Action/Common/TestRandom.cs
index ddac368b18..f8b6fa12d9 100644
--- a/.Lib9c.Tests/Action/Common/TestRandom.cs
+++ b/.Lib9c.Tests/Action/Common/TestRandom.cs
@@ -8,10 +8,11 @@ public class TestRandom : IRandom
 
         public TestRandom(int seed = default)
         {
+            Seed = seed;
             _random = new System.Random(seed);
         }
 
-        public int Seed => 0;
+        public int Seed { get; }
 
         public int Next()
         {