diff --git a/.travis.yml b/.travis.yml
index 9dc729fa8..c76e8c872 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,6 +28,9 @@ services:
   - mysql
   - redis-server
 
+before_script:
+  - echo "USE mysql;\nUPDATE user SET password=PASSWORD('1qazZAQ!') WHERE user='root';\nFLUSH PRIVILEGES;\n" | mysql -u root
+
 before_install:
   - chmod a+x ./runtests.sh
 
diff --git a/src/DotnetSpider.Core.Test/SpiderTest.cs b/src/DotnetSpider.Core.Test/SpiderTest.cs
index f7049868b..f7c6685f7 100644
--- a/src/DotnetSpider.Core.Test/SpiderTest.cs
+++ b/src/DotnetSpider.Core.Test/SpiderTest.cs
@@ -32,7 +32,7 @@ public void IdentityLengthLimit()
 			}
 			catch (Exception exception)
 			{
-				Assert.Equal($"Length of identity should less than {Env.IdentityMaxLength}.", exception.Message);
+				Assert.Equal($"Length of identity should less than {Env.IdentityMaxLength}", exception.Message);
 				return;
 			}
 
diff --git a/src/DotnetSpider.Extension.Test/Pipeline/MySqlEntityPipelineTest.cs b/src/DotnetSpider.Extension.Test/Pipeline/MySqlEntityPipelineTest.cs
index f96b07831..314b63b25 100644
--- a/src/DotnetSpider.Extension.Test/Pipeline/MySqlEntityPipelineTest.cs
+++ b/src/DotnetSpider.Extension.Test/Pipeline/MySqlEntityPipelineTest.cs
@@ -43,7 +43,7 @@ protected virtual IDbConnection CreateDbConnection()
 		[Fact(DisplayName = "DataTypes")]
 		public virtual void DataTypes()
 		{
-			using (MySqlConnection conn = new MySqlConnection("Database='mysql';Data Source=127.0.0.1;User ID=root;Password=;Port=3306;SslMode=None;"))
+			using (MySqlConnection conn = new MySqlConnection("Database='mysql';Data Source=127.0.0.1;User ID=root;Password=1qazZAQ!;Port=3306;SslMode=None;"))
 			{
 				try
 				{
@@ -53,7 +53,7 @@ public virtual void DataTypes()
 				{
 				}
 
-				var pipeline = new MySqlEntityPipeline("Database='mysql';Data Source=localhost;User ID=root;Password=;Port=3306;SslMode=None;");
+				var pipeline = new MySqlEntityPipeline("Database='mysql';Data Source=localhost;User ID=root;Password=1qazZAQ!;Port=3306;SslMode=None;");
 				var resultItems = new ResultItems();
 				resultItems.Request = new Request();
 				resultItems["aaaa"] =
diff --git a/src/DotnetSpider.Extension.Test/TestBase.cs b/src/DotnetSpider.Extension.Test/TestBase.cs
index 944270d67..f053c8630 100644
--- a/src/DotnetSpider.Extension.Test/TestBase.cs
+++ b/src/DotnetSpider.Extension.Test/TestBase.cs
@@ -2,6 +2,6 @@
 {
 	public abstract class TestBase
 	{
-		public virtual string DefaultConnectionString { get; } = "Database='mysql';Data Source=localhost;User ID=root;Port=3306;SslMode=None;";
+		public virtual string DefaultConnectionString { get; } = "Database='mysql';Data Source=localhost;Password=1qazZAQ!;User ID=root;Port=3306;SslMode=None;";
 	}
 }
diff --git a/src/DotnetSpider.Extension.Test/app.config b/src/DotnetSpider.Extension.Test/app.config
index 62a5bba92..c08213673 100644
--- a/src/DotnetSpider.Extension.Test/app.config
+++ b/src/DotnetSpider.Extension.Test/app.config
@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <connectionStrings>
-    <add name="SystemConnection" connectionString="Database='mysql';Data Source=localhost;User ID=root;Port=3306;SslMode=None;"
+    <add name="SystemConnection" connectionString="Database='mysql';Data Source=localhost;Password=1qazZAQ!;User ID=root;Port=3306;SslMode=None;"
           providerName="MySql.Data.MySqlClient" />
-    <add name="DataConnection" connectionString="Database='mysql';Data Source=localhost;User ID=root;Port=3306;SslMode=None;"
+    <add name="DataConnection" connectionString="Database='mysql';Data Source=localhost;User ID=root;Password=1qazZAQ!;Port=3306;SslMode=None;"
       providerName="MySql.Data.MySqlClient" />
 
     <add name="SqlServerDataConnection" connectionString="Database='mysql';Data Source=localhost;User ID=root;Port=3306;SslMode=None;"
diff --git a/src/DotnetSpider.Extension.Test/app.service.config b/src/DotnetSpider.Extension.Test/app.service.config
index 5fc3d2c5f..30d4bf69c 100644
--- a/src/DotnetSpider.Extension.Test/app.service.config
+++ b/src/DotnetSpider.Extension.Test/app.service.config
@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <connectionStrings>
-    <add name="SystemConnection" connectionString="Database='mysql';Data Source=localhost;User ID=root;Port=3306;SslMode=None;"
+    <add name="SystemConnection" connectionString="Database='mysql';Data Source=localhost;Password=1qazZAQ!;User ID=root;Port=3306;SslMode=None;"
           providerName="MySql.Data.MySqlClient" />
-    <add name="DataConnection" connectionString="Database='mysql';Data Source=localhost;User ID=root;Port=3306;SslMode=None;"
+    <add name="DataConnection" connectionString="Database='mysql';Data Source=localhost;Password=1qazZAQ!;User ID=root;Port=3306;SslMode=None;"
       providerName="MySql.Data.MySqlClient" />
   </connectionStrings>
   <appSettings>
diff --git a/src/DotnetSpider.Extension/Processor/ModelProcessor.cs b/src/DotnetSpider.Extension/Processor/ModelProcessor.cs
index b531b30c7..633721fe3 100644
--- a/src/DotnetSpider.Extension/Processor/ModelProcessor.cs
+++ b/src/DotnetSpider.Extension/Processor/ModelProcessor.cs
@@ -72,7 +72,9 @@ public ModelProcessor(IModel model, IModelExtractor extractor = null, params IDa
 				}
 			}
 
-			RequestExtractor = xPaths.Any(x => x == null || x == ".") ? new XPathRequestExtractor(".") : new XPathRequestExtractor(xPaths);
+			RequestExtractor = xPaths.Any(x => x == null || x == ".")
+				? new XPathRequestExtractor(".")
+				: (xPaths.Count == 0 ? null : new XPathRequestExtractor(xPaths));
 
 			if (dataHandlers == null) return;
 			foreach (var dataHandler in dataHandlers)