diff --git a/src/runtime/Python.Runtime.15.csproj b/src/runtime/Python.Runtime.15.csproj
index cfde0a127..a18640a54 100644
--- a/src/runtime/Python.Runtime.15.csproj
+++ b/src/runtime/Python.Runtime.15.csproj
@@ -1,5 +1,4 @@
-<Project>
-  <Import Project="Sdk.props" Sdk="Microsoft.NET.Sdk" />
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFrameworks>net40;netstandard2.0</TargetFrameworks>
     <Platforms>AnyCPU</Platforms>
@@ -35,7 +34,7 @@
     <Python2Version>$(PYTHONNET_PY2_VERSION)</Python2Version>
     <Python2Version Condition="'$(Python2Version)'==''">PYTHON27</Python2Version>
     <Python3Version>$(PYTHONNET_PY3_VERSION)</Python3Version>
-    <Python3Version Condition="'$(Python3Version)'==''">PYTHON36</Python3Version>
+    <Python3Version Condition="'$(Python3Version)'==''">PYTHON37</Python3Version>
     <PythonWinDefineConstants>$(PYTHONNET_WIN_DEFINE_CONSTANTS)</PythonWinDefineConstants>
     <PythonWinDefineConstants Condition="'$(PythonWinDefineConstants)'==''">UCS2</PythonWinDefineConstants>
     <PythonMonoDefineConstants>$(PYTHONNET_MONO_DEFINE_CONSTANTS)</PythonMonoDefineConstants>
@@ -61,6 +60,9 @@
     <DebugType>portable</DebugType>
   </PropertyGroup>
 
+  <PropertyGroup Condition=" '$(Configuration)' == 'Debug'">
+    <DefineConstants Condition="'$(CustomDefineConstants)' == ''">$(DefineConstants);PYTHON3;$(Python3Version);$(PythonMonoDefineConstants)</DefineConstants>
+  </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'ReleaseMono'">
     <DefineConstants Condition="'$(CustomDefineConstants)' == ''">$(DefineConstants);PYTHON2;$(Python2Version);$(PythonMonoDefineConstants)</DefineConstants>
   </PropertyGroup>
@@ -118,12 +120,6 @@
     <Reference Include="Microsoft.CSharp" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)'=='net40'">
-    <PackageReference Include="Microsoft.TargetingPack.NETFramework.v4.5" Version="1.0.1" ExcludeAssets="All" PrivateAssets="All" />
-  </ItemGroup>
-
-  <Import Project="Sdk.targets" Sdk="Microsoft.NET.Sdk" />
-
   <PropertyGroup>
     <TargetAssembly>$(TargetPath)</TargetAssembly>
     <TargetAssemblyPdb>$(TargetDir)$(TargetName).pdb</TargetAssemblyPdb>
diff --git a/src/runtime/Python.Runtime.15.net40.v3.ncrunchproject b/src/runtime/Python.Runtime.15.net40.v3.ncrunchproject
new file mode 100644
index 000000000..319cd523c
--- /dev/null
+++ b/src/runtime/Python.Runtime.15.net40.v3.ncrunchproject
@@ -0,0 +1,5 @@
+<ProjectConfiguration>
+  <Settings>
+    <IgnoreThisComponentCompletely>True</IgnoreThisComponentCompletely>
+  </Settings>
+</ProjectConfiguration>
\ No newline at end of file
diff --git a/src/runtime/Python.Runtime.15.netstandard2.0.v3.ncrunchproject b/src/runtime/Python.Runtime.15.netstandard2.0.v3.ncrunchproject
new file mode 100644
index 000000000..a4de8f987
--- /dev/null
+++ b/src/runtime/Python.Runtime.15.netstandard2.0.v3.ncrunchproject
@@ -0,0 +1,8 @@
+<ProjectConfiguration>
+  <Settings>
+    <IgnoredTests>
+      <AllTestsSelector />
+    </IgnoredTests>
+    <UseBuildConfiguration>DebugWinPY3</UseBuildConfiguration>
+  </Settings>
+</ProjectConfiguration>
\ No newline at end of file
diff --git a/src/runtime/interop36.cs b/src/runtime/interop36.cs
index c46bcc2f5..dde97bf3a 100644
--- a/src/runtime/interop36.cs
+++ b/src/runtime/interop36.cs
@@ -2,7 +2,7 @@
 // DO NOT MODIFIY BY HAND.
 
 
-#if PYTHON36
+#if PYTHON36 || PYTHON37
 using System;
 using System.Collections;
 using System.Collections.Specialized;