diff --git a/src/core/mesh/qgsmeshspatialindex.cpp b/src/core/mesh/qgsmeshspatialindex.cpp
index 6f9cfeb4b6b..037f67fbe47 100644
--- a/src/core/mesh/qgsmeshspatialindex.cpp
+++ b/src/core/mesh/qgsmeshspatialindex.cpp
@@ -27,6 +27,8 @@
 
 using namespace SpatialIndex;
 
+///@cond PRIVATE
+
 static Region faceToRegion( const QgsMesh &mesh, int id )
 {
   const QgsMeshFace face = mesh.face( id );
@@ -288,7 +290,7 @@ class QgsMeshSpatialIndexData : public QSharedData
 
 };
 
-// -------------------------------------------------------------------------
+///@endcond
 
 QgsMeshSpatialIndex::QgsMeshSpatialIndex()
 {
diff --git a/tests/src/3d/testqgs3drendering.cpp b/tests/src/3d/testqgs3drendering.cpp
index b0e9b3896d2..4144e4e86cc 100644
--- a/tests/src/3d/testqgs3drendering.cpp
+++ b/tests/src/3d/testqgs3drendering.cpp
@@ -24,6 +24,7 @@
 #include "qgssinglebandpseudocolorrenderer.h"
 #include "qgsvectorlayer.h"
 #include "qgsmeshlayer.h"
+#include "qgsmeshrenderersettings.h"
 
 #include "qgs3dmapscene.h"
 #include "qgs3dmapsettings.h"
@@ -104,6 +105,11 @@ void TestQgs3DRendering::initTestCase()
   mLayerMesh = new QgsMeshLayer( dataDir + "/mesh/quad_flower.2dm", "mesh", "mdal" );
   QVERIFY( mLayerMesh->isValid() );
   mLayerMesh->setCrs( mLayerDtm->crs() );  // this testing mesh does not have any CRS defined originally
+  // disable rendering of scalar 2d datasets for now
+  QgsMeshRendererSettings settings = mLayerMesh->rendererSettings();
+  settings.setActiveScalarDataset();
+  settings.setActiveVectorDataset();
+  mLayerMesh->setRendererSettings( settings );
   mProject->addMapLayer( mLayerMesh );
 
   QgsPhongMaterialSettings meshMaterial;