diff --git a/CryptoExchange.Net/Authentication/ApiCredentials.cs b/CryptoExchange.Net/Authentication/ApiCredentials.cs
index eb7fb50..4c2b899 100644
--- a/CryptoExchange.Net/Authentication/ApiCredentials.cs
+++ b/CryptoExchange.Net/Authentication/ApiCredentials.cs
@@ -11,12 +11,12 @@ namespace CryptoExchange.Net.Authentication
     public class ApiCredentials
     {
         /// <summary>
-        /// The api key to authenticate requests
+        /// The api key / label to authenticate requests
         /// </summary>
         public string Key { get; }
 
         /// <summary>
-        /// The api secret to authenticate requests
+        /// The api secret or private key to authenticate requests
         /// </summary>
         public string Secret { get; }
 
@@ -28,8 +28,8 @@ namespace CryptoExchange.Net.Authentication
         /// <summary>
         /// Create Api credentials providing an api key and secret for authentication
         /// </summary>
-        /// <param name="key">The api key used for identification</param>
-        /// <param name="secret">The api secret used for signing</param>
+        /// <param name="key">The api key / label used for identification</param>
+        /// <param name="secret">The api secret or private key used for signing</param>
         public ApiCredentials(string key, string secret) : this(key, secret, ApiCredentialsType.Hmac)
         {
         }
@@ -37,8 +37,8 @@ namespace CryptoExchange.Net.Authentication
         /// <summary>
         /// Create Api credentials providing an api key and secret for authentication
         /// </summary>
-        /// <param name="key">The api key used for identification</param>
-        /// <param name="secret">The api secret used for signing</param>
+        /// <param name="key">The api key / label used for identification</param>
+        /// <param name="secret">The api secret or private key used for signing</param>
         /// <param name="credentialsType">The type of credentials</param>
         public ApiCredentials(string key, string secret, ApiCredentialsType credentialsType)
         {
diff --git a/CryptoExchange.Net/Testing/Comparers/SystemTextJsonComparer.cs b/CryptoExchange.Net/Testing/Comparers/SystemTextJsonComparer.cs
index bdc29b1..12c603c 100644
--- a/CryptoExchange.Net/Testing/Comparers/SystemTextJsonComparer.cs
+++ b/CryptoExchange.Net/Testing/Comparers/SystemTextJsonComparer.cs
@@ -188,7 +188,7 @@ namespace CryptoExchange.Net.Testing.Comparers
         {
             if (propertyValue == default && propValue.Type != JTokenType.Null && !string.IsNullOrEmpty(propValue.ToString()))
             {
-                if (propertyType == typeof(DateTime?) && (propValue.ToString() == "" || propValue.ToString() == "0" || propValue.ToString() == "-1"))
+                if (propertyType == typeof(DateTime?) && (propValue.ToString() == "" || propValue.ToString() == "0" || propValue.ToString() == "-1" || propValue.ToString() == "01/01/0001 00:00:00"))
                     return;
 
                 // Property value not correct