diff --git a/util/test/demos/d3d11/d3d11_helpers.cpp b/util/test/demos/d3d11/d3d11_helpers.cpp
index 761574415..6dbc84947 100644
--- a/util/test/demos/d3d11/d3d11_helpers.cpp
+++ b/util/test/demos/d3d11/d3d11_helpers.cpp
@@ -220,6 +220,12 @@ D3D11BufferCreator &D3D11BufferCreator::Staging()
   return *this;
 }
 
+D3D11BufferCreator &D3D11BufferCreator::Shared()
+{
+  m_BufDesc.MiscFlags |= D3D11_RESOURCE_MISC_SHARED;
+  return *this;
+}
+
 D3D11BufferCreator &D3D11BufferCreator::Data(const void *data)
 {
   m_Initdata.pSysMem = data;
@@ -314,6 +320,12 @@ D3D11TextureCreator &D3D11TextureCreator::Staging()
   return *this;
 }
 
+D3D11TextureCreator &D3D11TextureCreator::Shared()
+{
+  MiscFlags |= D3D11_RESOURCE_MISC_SHARED;
+  return *this;
+}
+
 D3D11TextureCreator::operator ID3D11Texture1DPtr() const
 {
   D3D11_TEXTURE1D_DESC texdesc;
diff --git a/util/test/demos/d3d11/d3d11_helpers.h b/util/test/demos/d3d11/d3d11_helpers.h
index 7b98fa800..1871a6b01 100644
--- a/util/test/demos/d3d11/d3d11_helpers.h
+++ b/util/test/demos/d3d11/d3d11_helpers.h
@@ -103,6 +103,7 @@ public:
   D3D11BufferCreator &ByteAddressed();
   D3D11BufferCreator &Mappable();
   D3D11BufferCreator &Staging();
+  D3D11BufferCreator &Shared();
 
   D3D11BufferCreator &Data(const void *data);
   D3D11BufferCreator &Size(UINT size);
@@ -145,6 +146,7 @@ public:
 
   D3D11TextureCreator &Mappable();
   D3D11TextureCreator &Staging();
+  D3D11TextureCreator &Shared();
 
   operator ID3D11Texture1DPtr() const;
   operator ID3D11Texture2DPtr() const;
diff --git a/util/test/demos/gl/gl_dx_interop.cpp b/util/test/demos/gl/gl_dx_interop.cpp
index c00844769..a1441d741 100644
--- a/util/test/demos/gl/gl_dx_interop.cpp
+++ b/util/test/demos/gl/gl_dx_interop.cpp
@@ -141,11 +141,12 @@ void main()
     ID3D11VertexShaderPtr vs = d3d.CreateVS(vsblob);
     ID3D11PixelShaderPtr ps = d3d.CreatePS(psblob);
 
-    ID3D11Texture2DPtr d3d_fromd3d = d3d.MakeTexture(DXGI_FORMAT_R8G8B8A8_UNORM, 1024, 1024).RTV();
+    ID3D11Texture2DPtr d3d_fromd3d =
+        d3d.MakeTexture(DXGI_FORMAT_R8G8B8A8_UNORM, 1024, 1024).RTV().Shared();
     ID3D11RenderTargetViewPtr rtv = d3d.MakeRTV(d3d_fromd3d);
 
     ID3D11Texture2DPtr d3d_tod3d =
-        d3d.MakeTexture(DXGI_FORMAT_R8G8B8A8_UNORM, 1024, 1024).RTV().SRV();
+        d3d.MakeTexture(DXGI_FORMAT_R8G8B8A8_UNORM, 1024, 1024).RTV().SRV().Shared();
     ID3D11ShaderResourceViewPtr srv = d3d.MakeSRV(d3d_tod3d);
     ID3D11RenderTargetViewPtr rtv2 = d3d.MakeRTV(d3d_tod3d);
 
@@ -163,7 +164,7 @@ void main()
         {Vec3f(0.8f, 0.8f, 0.0f), Vec4f(0.0f, 0.0f, 1.0f, 1.0f), Vec2f(1.0f, 1.0f)},
     };
 
-    ID3D11BufferPtr buf = d3d.MakeBuffer().Vertex().Data(quad);
+    ID3D11BufferPtr buf = d3d.MakeBuffer().Vertex().Data(quad).Shared();
 
     GLuint vao = MakeVAO();
     glBindVertexArray(vao);
@@ -256,6 +257,8 @@ void main()
 
       ctx->ClearState();
 
+      ctx->Flush();
+
       res = wglDXLockObjectsNV(interop_dev, ARRAY_COUNT(lockHandles), lockHandles);
 
       TEST_ASSERT(res, "wglDXLockObjectsNV textures failed");