diff --git a/Huobi.Net.UnitTests/HuobiClientTests.cs b/Huobi.Net.UnitTests/HuobiClientTests.cs
index 7a814d56..28237fa1 100644
--- a/Huobi.Net.UnitTests/HuobiClientTests.cs
+++ b/Huobi.Net.UnitTests/HuobiClientTests.cs
@@ -53,24 +53,6 @@ public string SerializeExpected<T>(T data, bool tick)
             return $"{{\"status\": \"ok\", {(tick ? "tick" : "data")}: {JsonConvert.SerializeObject(data)}}}";
         }
 
-        [TestCase("BTCUSDT", true)]
-        [TestCase("NANOUSDT", true)]
-        [TestCase("NANOBTC", true)]
-        [TestCase("ETHBTC", true)]
-        [TestCase("BEETC", true)]
-        [TestCase("BEEC", true)]
-        [TestCase("BEC", false)]
-        [TestCase("NANOUSDTD", true)]
-        [TestCase("BTC-USDT", false)]
-        [TestCase("BTC-USD", false)]
-        public void CheckValidHuobiSymbol(string symbol, bool isValid)
-        {
-            if (isValid)
-                Assert.DoesNotThrow(() => symbol.ValidateHuobiSymbol());
-            else
-                Assert.Throws(typeof(ArgumentException), () => symbol.ValidateHuobiSymbol());
-        }
-
         [Test]
         public void CheckRestInterfaces()
         {
diff --git a/Huobi.Net/ExtensionMethods/HuobiExtensionMethods.cs b/Huobi.Net/ExtensionMethods/HuobiExtensionMethods.cs
index 9be0cd2b..609bdfe8 100644
--- a/Huobi.Net/ExtensionMethods/HuobiExtensionMethods.cs
+++ b/Huobi.Net/ExtensionMethods/HuobiExtensionMethods.cs
@@ -18,8 +18,6 @@ public static string ValidateHuobiSymbol(this string symbolString)
             if (string.IsNullOrEmpty(symbolString))
                 throw new ArgumentException("Symbol is not provided");
             symbolString = symbolString.ToLower(CultureInfo.InvariantCulture);
-            if (!Regex.IsMatch(symbolString, "^(([a-z]|[0-9]){4,})$"))
-                throw new ArgumentException($"{symbolString} is not a valid Huobi symbol. Should be [QuoteAsset][BaseAsset], e.g. ETHBTC");
             return symbolString;
         }
     }