diff --git a/src/UnitTests/UnitTests-Net35.csproj b/src/UnitTests/UnitTests-Net35.csproj
index c8f677e1..0b5f2a2a 100644
--- a/src/UnitTests/UnitTests-Net35.csproj
+++ b/src/UnitTests/UnitTests-Net35.csproj
@@ -58,7 +58,7 @@
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Runtime.Serialization" />
-    <Reference Include="System.XML" />
+    <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Numerics\Numerics-Net35.csproj">
diff --git a/src/UnitTests/UnitTests-Portable259.csproj b/src/UnitTests/UnitTests-Portable259.csproj
index dd6a8bb6..806b5a89 100644
--- a/src/UnitTests/UnitTests-Portable259.csproj
+++ b/src/UnitTests/UnitTests-Portable259.csproj
@@ -46,7 +46,7 @@
     <Reference Include="System.Numerics" />
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Runtime.Serialization" />
-    <Reference Include="System.XML" />
+    <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Numerics\Numerics-Portable259.csproj">
diff --git a/src/UnitTests/UnitTests-Portable328.csproj b/src/UnitTests/UnitTests-Portable328.csproj
index 9e4c54c5..b0c1d0b8 100644
--- a/src/UnitTests/UnitTests-Portable328.csproj
+++ b/src/UnitTests/UnitTests-Portable328.csproj
@@ -46,7 +46,7 @@
     <Reference Include="System.Numerics" />
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Runtime.Serialization" />
-    <Reference Include="System.XML" />
+    <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Numerics\Numerics-Portable328.csproj">
diff --git a/src/UnitTests/UnitTests-Portable47.csproj b/src/UnitTests/UnitTests-Portable47.csproj
index 65d3e962..dcdb8fe1 100644
--- a/src/UnitTests/UnitTests-Portable47.csproj
+++ b/src/UnitTests/UnitTests-Portable47.csproj
@@ -46,7 +46,7 @@
     <Reference Include="System.Numerics" />
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Runtime.Serialization" />
-    <Reference Include="System.XML" />
+    <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Numerics\Numerics-Portable47.csproj">
diff --git a/src/UnitTests/UnitTests-Portable7.csproj b/src/UnitTests/UnitTests-Portable7.csproj
index 3d239bcd..3e0579e7 100644
--- a/src/UnitTests/UnitTests-Portable7.csproj
+++ b/src/UnitTests/UnitTests-Portable7.csproj
@@ -46,7 +46,7 @@
     <Reference Include="System.Numerics" />
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Runtime.Serialization" />
-    <Reference Include="System.XML" />
+    <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Numerics\Numerics-Portable7.csproj">
diff --git a/src/UnitTests/UnitTests-Portable78.csproj b/src/UnitTests/UnitTests-Portable78.csproj
index b143c97f..627fe1bd 100644
--- a/src/UnitTests/UnitTests-Portable78.csproj
+++ b/src/UnitTests/UnitTests-Portable78.csproj
@@ -46,7 +46,7 @@
     <Reference Include="System.Numerics" />
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Runtime.Serialization" />
-    <Reference Include="System.XML" />
+    <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Numerics\Numerics-Portable78.csproj">
diff --git a/src/UnitTests/UnitTests.csproj b/src/UnitTests/UnitTests.csproj
index 54ee9cd0..846a022a 100644
--- a/src/UnitTests/UnitTests.csproj
+++ b/src/UnitTests/UnitTests.csproj
@@ -68,7 +68,7 @@
     <Reference Include="System.Numerics" />
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Runtime.Serialization" />
-    <Reference Include="System.XML" />
+    <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Numerics\Numerics.csproj">