diff --git a/neo.UnitTests/UT_DataCache.cs b/neo.UnitTests/UT_DataCache.cs
index 40c3ee8a3b..85df272db5 100644
--- a/neo.UnitTests/UT_DataCache.cs
+++ b/neo.UnitTests/UT_DataCache.cs
@@ -50,7 +50,7 @@ public void TestCachedFind_Between()
                 );
 
             CollectionAssert.AreEqual(
-                cache.Find(new byte[] { 0x00 }).Select(u => u.Key.Key[1]).ToArray(),
+                cache.Find(new byte[21]).Select(u => u.Key.Key[1]).ToArray(),
                 new byte[] { 0x01, 0x02, 0x03 }
                 );
 
@@ -88,7 +88,7 @@ public void TestCachedFind_Last()
                 );
 
             CollectionAssert.AreEqual(
-                cache.Find(new byte[] { 0x00 }).Select(u => u.Key.Key[1]).ToArray(),
+                cache.Find(new byte[21]).Select(u => u.Key.Key[1]).ToArray(),
                 new byte[] { 0x01, 0x02 }
                 );
 
@@ -116,7 +116,7 @@ public void TestCachedFind_Empty()
                 );
 
             CollectionAssert.AreEqual(
-                cache.Find(new byte[] { 0x00 }).Select(u => u.Key.Key[1]).ToArray(),
+                cache.Find(new byte[21]).Select(u => u.Key.Key[1]).ToArray(),
                 new byte[] { 0x02 }
                 );