diff --git a/test/Redis.OM.Unit.Tests/CoreTests.cs b/test/Redis.OM.Unit.Tests/CoreTests.cs
index 960df96..c9e1819 100644
--- a/test/Redis.OM.Unit.Tests/CoreTests.cs
+++ b/test/Redis.OM.Unit.Tests/CoreTests.cs
@@ -78,7 +78,7 @@ public void ExpireFractionalMillisecond()
             var jsonObjWithExpire = new BasicJsonObject { Name = "JsonWithExpire" };
             var key = connection.Set(jsonObjWithExpire, TimeSpan.FromMilliseconds(5000.5));
             var ttl = (long)connection.Execute("PTTL", key);
-            Assert.True(ttl <= 5000.5);
+            Assert.True(ttl <= 5001);
             Assert.True(ttl >= 1000);
         }