diff --git a/SimplePolicy.UnitTests/SimplePolicy.UnitTests.csproj b/SimplePolicy.UnitTests/SimplePolicy.UnitTests.csproj
new file mode 100644
index 000000000..d49e54aec
--- /dev/null
+++ b/SimplePolicy.UnitTests/SimplePolicy.UnitTests.csproj
@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <AssemblyName>SimplePolicy.UnitTests</AssemblyName>
+    <RootNamespace>SimplePolicy.UnitTests</RootNamespace>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="FluentAssertions" Version="4.19.4" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.3.0" />
+    <PackageReference Include="MSTest.TestAdapter" Version="1.2.0" />
+    <PackageReference Include="MSTest.TestFramework" Version="1.2.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\SimplePolicy\SimplePolicy.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/SimplePolicy.UnitTests/UT_SimplePolicy.cs b/SimplePolicy.UnitTests/UT_SimplePolicy.cs
new file mode 100644
index 000000000..3f7d7b9e1
--- /dev/null
+++ b/SimplePolicy.UnitTests/UT_SimplePolicy.cs
@@ -0,0 +1,26 @@
+using FluentAssertions;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Neo.Plugins;
+
+
+namespace SimplePolicy.UnitTests
+{
+    [TestClass]
+    public class UT_SimplePolicy
+    {
+        SimplePolicyPlugin uut;
+
+        [TestInitialize]
+        public void TestSetup()
+        {
+            uut = new SimplePolicyPlugin();
+        }
+
+        [TestMethod]
+        public void TestMaxTransactionsPerBlock()
+        {
+            Settings.Default.MaxTransactionsPerBlock.Should().Be(500);
+            Settings.Default.MaxFreeTransactionsPerBlock.Should().Be(20);
+        }
+    }
+}
diff --git a/SimplePolicy/Helper.cs b/SimplePolicy/Helper.cs
new file mode 100644
index 000000000..895731aaf
--- /dev/null
+++ b/SimplePolicy/Helper.cs
@@ -0,0 +1,14 @@
+using Microsoft.Extensions.Configuration;
+using System;
+
+namespace Neo.Plugins
+{
+    internal static class Helper
+    {
+        public static T GetValueOrDefault<T>(this IConfigurationSection section, T defaultValue, Func<string, T> selector)
+        {
+            if (section.Value == null) return defaultValue;
+            return selector(section.Value);
+        }
+    }
+}
diff --git a/SimplePolicy/Settings.cs b/SimplePolicy/Settings.cs
index 47369a084..c6f8f6760 100644
--- a/SimplePolicy/Settings.cs
+++ b/SimplePolicy/Settings.cs
@@ -53,7 +53,7 @@ internal class BlockedAccounts
 
         public BlockedAccounts(IConfigurationSection section)
         {
-            this.Type = (PolicyType)Enum.Parse(typeof(PolicyType), section.GetSection("Type").Value, true);
+            this.Type = section.GetSection("Type").GetValueOrDefault(PolicyType.AllowAll, p => (PolicyType)Enum.Parse(typeof(PolicyType), p, true));
             this.List = new HashSet<UInt160>(section.GetSection("List").GetChildren().Select(p => p.Value.ToScriptHash()));
         }
     }
diff --git a/SimplePolicy/SimplePolicyPlugin.cs b/SimplePolicy/SimplePolicyPlugin.cs
index f18680616..933c5ae86 100644
--- a/SimplePolicy/SimplePolicyPlugin.cs
+++ b/SimplePolicy/SimplePolicyPlugin.cs
@@ -5,6 +5,9 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Runtime.CompilerServices;
+
+[assembly: InternalsVisibleTo("SimplePolicy.UnitTests")]
 
 namespace Neo.Plugins
 {
diff --git a/neo-plugins.sln b/neo-plugins.sln
index c0a23db38..83027c37d 100644
--- a/neo-plugins.sln
+++ b/neo-plugins.sln
@@ -1,49 +1,55 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.27428.2027
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SimplePolicy", "SimplePolicy\SimplePolicy.csproj", "{322C366E-F891-47FD-A039-0FEF79BCB6D5}"
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ApplicationLogs", "ApplicationLogs\ApplicationLogs.csproj", "{84DA8EA6-EF60-4FCD-B1C6-65C1A8323B3F}"
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "RpcSecurity", "RpcSecurity\RpcSecurity.csproj", "{6800D782-8EC0-49E9-98C4-195C8F781A1F}"
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "StatesDumper", "StatesDumper\StatesDumper.csproj", "{86531DB1-A231-46C4-823F-BE60972F7523}"
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ImportBlocks", "ImportBlocks\ImportBlocks.csproj", "{B7A42984-57BB-4F8D-967B-23B0E841B726}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Any CPU = Debug|Any CPU
-		Release|Any CPU = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{322C366E-F891-47FD-A039-0FEF79BCB6D5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{322C366E-F891-47FD-A039-0FEF79BCB6D5}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{322C366E-F891-47FD-A039-0FEF79BCB6D5}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{322C366E-F891-47FD-A039-0FEF79BCB6D5}.Release|Any CPU.Build.0 = Release|Any CPU
-		{84DA8EA6-EF60-4FCD-B1C6-65C1A8323B3F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{84DA8EA6-EF60-4FCD-B1C6-65C1A8323B3F}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{84DA8EA6-EF60-4FCD-B1C6-65C1A8323B3F}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{84DA8EA6-EF60-4FCD-B1C6-65C1A8323B3F}.Release|Any CPU.Build.0 = Release|Any CPU
-		{6800D782-8EC0-49E9-98C4-195C8F781A1F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{6800D782-8EC0-49E9-98C4-195C8F781A1F}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{6800D782-8EC0-49E9-98C4-195C8F781A1F}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{6800D782-8EC0-49E9-98C4-195C8F781A1F}.Release|Any CPU.Build.0 = Release|Any CPU
-		{86531DB1-A231-46C4-823F-BE60972F7523}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{86531DB1-A231-46C4-823F-BE60972F7523}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{86531DB1-A231-46C4-823F-BE60972F7523}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{86531DB1-A231-46C4-823F-BE60972F7523}.Release|Any CPU.Build.0 = Release|Any CPU
-		{B7A42984-57BB-4F8D-967B-23B0E841B726}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{B7A42984-57BB-4F8D-967B-23B0E841B726}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{B7A42984-57BB-4F8D-967B-23B0E841B726}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{B7A42984-57BB-4F8D-967B-23B0E841B726}.Release|Any CPU.Build.0 = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-	GlobalSection(ExtensibilityGlobals) = postSolution
-		SolutionGuid = {61D3ADE6-BBFC-402D-AB42-1C71C9F9EDE3}
-	EndGlobalSection
-EndGlobal
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.27428.2027
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SimplePolicy", "SimplePolicy\SimplePolicy.csproj", "{322C366E-F891-47FD-A039-0FEF79BCB6D5}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ApplicationLogs", "ApplicationLogs\ApplicationLogs.csproj", "{84DA8EA6-EF60-4FCD-B1C6-65C1A8323B3F}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "RpcSecurity", "RpcSecurity\RpcSecurity.csproj", "{6800D782-8EC0-49E9-98C4-195C8F781A1F}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "StatesDumper", "StatesDumper\StatesDumper.csproj", "{86531DB1-A231-46C4-823F-BE60972F7523}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ImportBlocks", "ImportBlocks\ImportBlocks.csproj", "{B7A42984-57BB-4F8D-967B-23B0E841B726}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SimplePolicy.UnitTests", "SimplePolicy.UnitTests\SimplePolicy.UnitTests.csproj", "{0DA81327-DC81-4960-91C8-4C5F8B9B804C}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{322C366E-F891-47FD-A039-0FEF79BCB6D5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{322C366E-F891-47FD-A039-0FEF79BCB6D5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{322C366E-F891-47FD-A039-0FEF79BCB6D5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{322C366E-F891-47FD-A039-0FEF79BCB6D5}.Release|Any CPU.Build.0 = Release|Any CPU
+		{84DA8EA6-EF60-4FCD-B1C6-65C1A8323B3F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{84DA8EA6-EF60-4FCD-B1C6-65C1A8323B3F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{84DA8EA6-EF60-4FCD-B1C6-65C1A8323B3F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{84DA8EA6-EF60-4FCD-B1C6-65C1A8323B3F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6800D782-8EC0-49E9-98C4-195C8F781A1F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6800D782-8EC0-49E9-98C4-195C8F781A1F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6800D782-8EC0-49E9-98C4-195C8F781A1F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6800D782-8EC0-49E9-98C4-195C8F781A1F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{86531DB1-A231-46C4-823F-BE60972F7523}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{86531DB1-A231-46C4-823F-BE60972F7523}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{86531DB1-A231-46C4-823F-BE60972F7523}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{86531DB1-A231-46C4-823F-BE60972F7523}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B7A42984-57BB-4F8D-967B-23B0E841B726}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B7A42984-57BB-4F8D-967B-23B0E841B726}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B7A42984-57BB-4F8D-967B-23B0E841B726}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B7A42984-57BB-4F8D-967B-23B0E841B726}.Release|Any CPU.Build.0 = Release|Any CPU
+		{0DA81327-DC81-4960-91C8-4C5F8B9B804C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0DA81327-DC81-4960-91C8-4C5F8B9B804C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0DA81327-DC81-4960-91C8-4C5F8B9B804C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0DA81327-DC81-4960-91C8-4C5F8B9B804C}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {61D3ADE6-BBFC-402D-AB42-1C71C9F9EDE3}
+	EndGlobalSection
+EndGlobal