diff --git a/src/tests/Interop/StringMarshalling/BSTR/BSTRTest.csproj b/src/tests/Interop/StringMarshalling/BSTR/BSTRTest.csproj
index 08df9c12dfe4d..7aab41716ae90 100644
--- a/src/tests/Interop/StringMarshalling/BSTR/BSTRTest.csproj
+++ b/src/tests/Interop/StringMarshalling/BSTR/BSTRTest.csproj
@@ -12,5 +12,6 @@
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="$(TestLibraryProjectPath)" />
+    <CMakeProjectReference Include="./CMakeLists.txt" />
   </ItemGroup>
 </Project>
diff --git a/src/tests/Interop/StringMarshalling/LPSTR/LPSTRTest.csproj b/src/tests/Interop/StringMarshalling/LPSTR/LPSTRTest.csproj
index 27998767cb046..f4aa61dc24e84 100644
--- a/src/tests/Interop/StringMarshalling/LPSTR/LPSTRTest.csproj
+++ b/src/tests/Interop/StringMarshalling/LPSTR/LPSTRTest.csproj
@@ -10,5 +10,6 @@
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="$(TestLibraryProjectPath)" />
+    <CMakeProjectReference Include="./CMakeLists.txt" />
   </ItemGroup>
 </Project>