diff --git a/Src/Newtonsoft.Json.Net20.sln b/Src/Newtonsoft.Json.Net20.sln
index 17aedae5..06603606 100644
--- a/Src/Newtonsoft.Json.Net20.sln
+++ b/Src/Newtonsoft.Json.Net20.sln
@@ -1,13 +1,8 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 2013
-VisualStudioVersion = 12.0.30324.0
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Lib", "Lib", "{620042D9-2753-48F5-BEDE-3905248781D2}"
-	ProjectSection(SolutionItems) = preProject
-		Lib\NUnit\DotNet\nunit.framework.dll = Lib\NUnit\DotNet\nunit.framework.dll
-		Lib\NUnit\DotNet\nunit.framework.xml = Lib\NUnit\DotNet\nunit.framework.xml
-	EndProjectSection
-EndProject
+VisualStudioVersion = 12.0.31101.0
+MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Newtonsoft.Json.Net20", "Newtonsoft.Json\Newtonsoft.Json.Net20.csproj", "{A9AE40FF-1A21-414A-9FE7-3BE13644CC6D}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Newtonsoft.Json.Tests.Net20", "Newtonsoft.Json.Tests\Newtonsoft.Json.Tests.Net20.csproj", "{3E6E2335-B079-4B5B-A65A-9D586914BCBB}"
diff --git a/Src/Newtonsoft.Json.Net40.sln b/Src/Newtonsoft.Json.Net40.sln
index 98911a1c..1b09e98d 100644
--- a/Src/Newtonsoft.Json.Net40.sln
+++ b/Src/Newtonsoft.Json.Net40.sln
@@ -1,13 +1,8 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 2013
-VisualStudioVersion = 12.0.30324.0
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Lib", "Lib", "{620042D9-2753-48F5-BEDE-3905248781D2}"
-	ProjectSection(SolutionItems) = preProject
-		Lib\NUnit\DotNet\nunit.framework.dll = Lib\NUnit\DotNet\nunit.framework.dll
-		Lib\NUnit\DotNet\nunit.framework.xml = Lib\NUnit\DotNet\nunit.framework.xml
-	EndProjectSection
-EndProject
+VisualStudioVersion = 12.0.31101.0
+MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Newtonsoft.Json.Net40", "Newtonsoft.Json\Newtonsoft.Json.Net40.csproj", "{A9AE40FF-1A21-414A-9FE7-3BE13644CC6D}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Newtonsoft.Json.Tests.Net40", "Newtonsoft.Json.Tests\Newtonsoft.Json.Tests.Net40.csproj", "{3E6E2335-B079-4B5B-A65A-9D586914BCBB}"
diff --git a/Src/Newtonsoft.Json.Portable.sln b/Src/Newtonsoft.Json.Portable.sln
index 15307c10..ef75c820 100644
--- a/Src/Newtonsoft.Json.Portable.sln
+++ b/Src/Newtonsoft.Json.Portable.sln
@@ -1,14 +1,8 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 2013
-VisualStudioVersion = 12.0.30324.0
+VisualStudioVersion = 12.0.31101.0
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Lib", "Lib", "{620042D9-2753-48F5-BEDE-3905248781D2}"
-	ProjectSection(SolutionItems) = preProject
-		Lib\NUnit\DotNet\nunit.framework.dll = Lib\NUnit\DotNet\nunit.framework.dll
-		Lib\NUnit\DotNet\nunit.framework.xml = Lib\NUnit\DotNet\nunit.framework.xml
-	EndProjectSection
-EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Newtonsoft.Json.Portable", "Newtonsoft.Json\Newtonsoft.Json.Portable.csproj", "{959F7F85-C98B-4876-971A-9036224578E4}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Newtonsoft.Json.Tests.Portable", "Newtonsoft.Json.Tests\Newtonsoft.Json.Tests.Portable.csproj", "{3E6E2335-B079-4B5B-A65A-9D586914BCBB}"
diff --git a/Src/Newtonsoft.Json.Portable40.sln b/Src/Newtonsoft.Json.Portable40.sln
index 2bf5057a..37e89da6 100644
--- a/Src/Newtonsoft.Json.Portable40.sln
+++ b/Src/Newtonsoft.Json.Portable40.sln
@@ -1,14 +1,8 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 2013
-VisualStudioVersion = 12.0.21005.1
+VisualStudioVersion = 12.0.31101.0
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Lib", "Lib", "{620042D9-2753-48F5-BEDE-3905248781D2}"
-	ProjectSection(SolutionItems) = preProject
-		Lib\NUnit\DotNet\nunit.framework.dll = Lib\NUnit\DotNet\nunit.framework.dll
-		Lib\NUnit\DotNet\nunit.framework.xml = Lib\NUnit\DotNet\nunit.framework.xml
-	EndProjectSection
-EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Newtonsoft.Json.Portable40", "Newtonsoft.Json\Newtonsoft.Json.Portable40.csproj", "{959F7F85-C98B-4876-971A-9036224578E4}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Newtonsoft.Json.Tests.Portable40", "Newtonsoft.Json.Tests\Newtonsoft.Json.Tests.Portable40.csproj", "{3E6E2335-B079-4B5B-A65A-9D586914BCBB}"