diff --git a/src/eressea.vcxproj b/src/eressea.vcxproj
index 923c88f6a..7f591479a 100644
--- a/src/eressea.vcxproj
+++ b/src/eressea.vcxproj
@@ -55,7 +55,7 @@
       <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>stdafx.h</PrecompiledHeaderFile>
-      <WarningLevel>Level4</WarningLevel>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
       <DebugInformationFormat>EditAndContinue</DebugInformationFormat>
       <TreatWarningAsError>true</TreatWarningAsError>
     </ClCompile>
@@ -88,6 +88,9 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
+    <ClCompile Include="..\..\shared\src\tests_test.c">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="spells\alp.c">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
diff --git a/src/eressea.vcxproj.filters b/src/eressea.vcxproj.filters
index 4280bbf4a..3075045d1 100644
--- a/src/eressea.vcxproj.filters
+++ b/src/eressea.vcxproj.filters
@@ -83,6 +83,9 @@
     <ClCompile Include="..\..\shared\src\build\util.c">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\shared\src\tests_test.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="spells\alp.h">