diff --git a/test/unit/ut3DImportExport.cpp b/test/unit/ut3DImportExport.cpp
index b55bf9c4c..6becbd866 100644
--- a/test/unit/ut3DImportExport.cpp
+++ b/test/unit/ut3DImportExport.cpp
@@ -45,6 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -52,7 +53,7 @@ class ut3DImportExport : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/3D/box_a.3d", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/3D/box_a.3d", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };
diff --git a/test/unit/ut3DSImportExport.cpp b/test/unit/ut3DSImportExport.cpp
index 1e9bfe0d0..69e889ae6 100644
--- a/test/unit/ut3DSImportExport.cpp
+++ b/test/unit/ut3DSImportExport.cpp
@@ -45,6 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -52,7 +53,7 @@ class ut3DSImportExport : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/3DS/fels.3ds", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/3DS/fels.3ds", aiProcess_ValidateDataStructure );
 #ifndef ASSIMP_BUILD_NO_3DS_IMPORTER
         return nullptr != scene;
 #else
diff --git a/test/unit/utACImportExport.cpp b/test/unit/utACImportExport.cpp
index 3c3dcaa7b..178816532 100644
--- a/test/unit/utACImportExport.cpp
+++ b/test/unit/utACImportExport.cpp
@@ -45,6 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -52,7 +53,7 @@ class utACImportExport : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/AC/Wuson.ac", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/AC/Wuson.ac", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };
diff --git a/test/unit/utAMFImportExport.cpp b/test/unit/utAMFImportExport.cpp
index e4ee5605a..35afd375c 100644
--- a/test/unit/utAMFImportExport.cpp
+++ b/test/unit/utAMFImportExport.cpp
@@ -45,6 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -52,7 +53,7 @@ class utAMFImportExport : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/AMF/test1.amf", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/AMF/test1.amf", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };
diff --git a/test/unit/utASEImportExport.cpp b/test/unit/utASEImportExport.cpp
index 841aff549..1f62d3385 100644
--- a/test/unit/utASEImportExport.cpp
+++ b/test/unit/utASEImportExport.cpp
@@ -45,6 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -52,7 +53,7 @@ class utASEImportExport : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/ASE/ThreeCubesGreen.ASE", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/ASE/ThreeCubesGreen.ASE", aiProcess_ValidateDataStructure );
 #ifndef ASSIMP_BUILD_NO_3DS_IMPORTER
         return nullptr != scene;
 #else 
diff --git a/test/unit/utB3DImportExport.cpp b/test/unit/utB3DImportExport.cpp
index 0a800ccb6..eaa56beed 100644
--- a/test/unit/utB3DImportExport.cpp
+++ b/test/unit/utB3DImportExport.cpp
@@ -45,6 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -52,7 +53,7 @@ class utB3DImportExport : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/B3D/WusonBlitz.b3d", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/B3D/WusonBlitz.b3d", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };
diff --git a/test/unit/utBVHImportExport.cpp b/test/unit/utBVHImportExport.cpp
index 48281c667..a080ca3a4 100644
--- a/test/unit/utBVHImportExport.cpp
+++ b/test/unit/utBVHImportExport.cpp
@@ -43,6 +43,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -50,7 +51,7 @@ class utBVHImportExport : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/BVH/01_01.bvh", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/BVH/01_01.bvh", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };
diff --git a/test/unit/utBlendImportAreaLight.cpp b/test/unit/utBlendImportAreaLight.cpp
index 04cc8cbcf..55a68b040 100644
--- a/test/unit/utBlendImportAreaLight.cpp
+++ b/test/unit/utBlendImportAreaLight.cpp
@@ -45,6 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/Exporter.hpp>
 #include <assimp/Importer.hpp>
 #include <assimp/scene.h>
+#include <assimp/postprocess.h>
 
 class BlendImportAreaLight : public ::testing::Test {
 public:
@@ -67,7 +68,7 @@ protected:
 // ------------------------------------------------------------------------------------------------
 TEST_F(BlendImportAreaLight, testImportLight)
 {
-    const aiScene* pTest = im->ReadFile(ASSIMP_TEST_MODELS_DIR "/BLEND/AreaLight_269.blend",0);
+    const aiScene* pTest = im->ReadFile(ASSIMP_TEST_MODELS_DIR "/BLEND/AreaLight_269.blend", aiProcess_ValidateDataStructure);
     ASSERT_TRUE(pTest != NULL);
     ASSERT_TRUE(pTest->HasLights());
 
diff --git a/test/unit/utBlendImportMaterials.cpp b/test/unit/utBlendImportMaterials.cpp
index 6e1033453..4387243c4 100644
--- a/test/unit/utBlendImportMaterials.cpp
+++ b/test/unit/utBlendImportMaterials.cpp
@@ -44,6 +44,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/cexport.h>
 #include <assimp/Importer.hpp>
 #include <assimp/scene.h>
+#include <assimp/postprocess.h>
 
 class BlendImportMaterials : public ::testing::Test {
 public:
@@ -66,7 +67,7 @@ protected:
 // ------------------------------------------------------------------------------------------------
 TEST_F(BlendImportMaterials, testImportMaterial)
 {
-    const aiScene* pTest = im->ReadFile(ASSIMP_TEST_MODELS_DIR "/BLEND/BlenderMaterial_269.blend", 0);
+    const aiScene* pTest = im->ReadFile(ASSIMP_TEST_MODELS_DIR "/BLEND/BlenderMaterial_269.blend", aiProcess_ValidateDataStructure);
     ASSERT_TRUE(pTest != NULL);
     ASSERT_TRUE(pTest->HasMaterials());
 
diff --git a/test/unit/utBlenderImportExport.cpp b/test/unit/utBlenderImportExport.cpp
index a120fdcc5..6d7ca8dd7 100644
--- a/test/unit/utBlenderImportExport.cpp
+++ b/test/unit/utBlenderImportExport.cpp
@@ -43,6 +43,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -50,7 +51,7 @@ class utBlenderImporterExporter : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/BLEND/box.blend", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/BLEND/box.blend", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };
diff --git a/test/unit/utCSMImportExport.cpp b/test/unit/utCSMImportExport.cpp
index eb6672a44..74cdfcf94 100644
--- a/test/unit/utCSMImportExport.cpp
+++ b/test/unit/utCSMImportExport.cpp
@@ -43,6 +43,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -50,7 +51,7 @@ class utCSMImportExport : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/CSM/ThomasFechten.csm", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/CSM/ThomasFechten.csm", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };
diff --git a/test/unit/utColladaExportCamera.cpp b/test/unit/utColladaExportCamera.cpp
index 4949efc83..cbb491204 100644
--- a/test/unit/utColladaExportCamera.cpp
+++ b/test/unit/utColladaExportCamera.cpp
@@ -45,6 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/Exporter.hpp>
 #include <assimp/Importer.hpp>
 #include <assimp/scene.h>
+#include <assimp/postprocess.h>
 
 #ifndef ASSIMP_BUILD_NO_EXPORT
 
@@ -73,7 +74,7 @@ TEST_F(ColladaExportCamera, testExportCamera)
 {
     const char* file = "cameraExp.dae";
 
-    const aiScene* pTest = im->ReadFile(ASSIMP_TEST_MODELS_DIR "/Collada/cameras.dae",0);
+    const aiScene* pTest = im->ReadFile(ASSIMP_TEST_MODELS_DIR "/Collada/cameras.dae", aiProcess_ValidateDataStructure);
     ASSERT_TRUE(pTest!=NULL);
     ASSERT_TRUE(pTest->HasCameras());
 
@@ -95,7 +96,7 @@ TEST_F(ColladaExportCamera, testExportCamera)
         names[ i ] = orig->mName;
         pos[ i ] = orig->mPosition;
     }
-    const aiScene* imported = im->ReadFile(file,0);
+    const aiScene* imported = im->ReadFile(file, aiProcess_ValidateDataStructure);
 
     ASSERT_TRUE(imported!=NULL);
 
diff --git a/test/unit/utColladaExportLight.cpp b/test/unit/utColladaExportLight.cpp
index ccff1a31e..5c4801d32 100644
--- a/test/unit/utColladaExportLight.cpp
+++ b/test/unit/utColladaExportLight.cpp
@@ -45,6 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/Exporter.hpp>
 #include <assimp/Importer.hpp>
 #include <assimp/scene.h>
+#include <assimp/postprocess.h>
 
 #ifndef ASSIMP_BUILD_NO_EXPORT
 
@@ -72,7 +73,7 @@ TEST_F(ColladaExportLight, testExportLight)
 {
     const char* file = "lightsExp.dae";
 
-    const aiScene* pTest = im->ReadFile(ASSIMP_TEST_MODELS_DIR "/Collada/lights.dae",0);
+    const aiScene* pTest = im->ReadFile(ASSIMP_TEST_MODELS_DIR "/Collada/lights.dae", aiProcess_ValidateDataStructure);
     ASSERT_TRUE(pTest!=NULL);
     ASSERT_TRUE(pTest->HasLights());
 
@@ -86,7 +87,7 @@ TEST_F(ColladaExportLight, testExportLight)
 
     EXPECT_EQ(AI_SUCCESS,ex->Export(pTest,"collada",file));
 
-    const aiScene* imported = im->ReadFile(file,0);
+    const aiScene* imported = im->ReadFile(file, aiProcess_ValidateDataStructure);
 
     ASSERT_TRUE(imported!=NULL);
 
diff --git a/test/unit/utColladaImportExport.cpp b/test/unit/utColladaImportExport.cpp
index 997fca188..97cb5c2ca 100644
--- a/test/unit/utColladaImportExport.cpp
+++ b/test/unit/utColladaImportExport.cpp
@@ -43,6 +43,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -50,7 +51,7 @@ class utColladaImportExport : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/Collada/duck.dae", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/Collada/duck.dae", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };
diff --git a/test/unit/utD3MFImportExport.cpp b/test/unit/utD3MFImportExport.cpp
index 0c322420c..5c155da4b 100644
--- a/test/unit/utD3MFImportExport.cpp
+++ b/test/unit/utD3MFImportExport.cpp
@@ -44,12 +44,13 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <assimp/Importer.hpp>
 #include <assimp/scene.h>
+#include <assimp/postprocess.h>
 
 class utD3MFImporterExporter : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/3MF/box.3mf", 0);
+        const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/3MF/box.3mf", aiProcess_ValidateDataStructure);
         EXPECT_EQ( 1u, scene->mNumMeshes );
         aiMesh *mesh = scene->mMeshes[ 0 ];
         EXPECT_NE( nullptr, mesh );
diff --git a/test/unit/utDXFImporterExporter.cpp b/test/unit/utDXFImporterExporter.cpp
index 389284608..b75db3ec4 100644
--- a/test/unit/utDXFImporterExporter.cpp
+++ b/test/unit/utDXFImporterExporter.cpp
@@ -45,6 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -52,7 +53,7 @@ class utDXFImporterExporter : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/DXF/PinkEggFromLW.dxf", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/DXF/PinkEggFromLW.dxf", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };
diff --git a/test/unit/utExport.cpp b/test/unit/utExport.cpp
index f810e3dce..b3ab5e372 100644
--- a/test/unit/utExport.cpp
+++ b/test/unit/utExport.cpp
@@ -14,7 +14,7 @@ public:
         ex = new Assimp::Exporter();
         im = new Assimp::Importer();
 
-        pTest = im->ReadFile(ASSIMP_TEST_MODELS_DIR "/X/test.x",0);
+        pTest = im->ReadFile(ASSIMP_TEST_MODELS_DIR "/X/test.x", aiProcess_ValidateDataStructure);
     }
 
     virtual void TearDown()
@@ -37,7 +37,7 @@ TEST_F(ExporterTest, testExportToFile)
     EXPECT_EQ(AI_SUCCESS,ex->Export(pTest,"collada",file));
 
     // check if we can read it again
-    EXPECT_TRUE(im->ReadFile(file,0));
+    EXPECT_TRUE(im->ReadFile(file, aiProcess_ValidateDataStructure));
 }
 
 // ------------------------------------------------------------------------------------------------
diff --git a/test/unit/utFBXImporterExporter.cpp b/test/unit/utFBXImporterExporter.cpp
index f335bc682..2807f801c 100644
--- a/test/unit/utFBXImporterExporter.cpp
+++ b/test/unit/utFBXImporterExporter.cpp
@@ -45,6 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -52,7 +53,7 @@ class utFBXImporterExporter : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/FBX/spider.fbx", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/FBX/spider.fbx", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };
diff --git a/test/unit/utHMPImportExport.cpp b/test/unit/utHMPImportExport.cpp
index 2b71c7211..35bc0bb01 100644
--- a/test/unit/utHMPImportExport.cpp
+++ b/test/unit/utHMPImportExport.cpp
@@ -43,6 +43,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -50,7 +51,7 @@ class utHMPImportExport : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/HMP/terrain.hmp", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/HMP/terrain.hmp", aiProcess_ValidateDataStructure );
         return nullptr != scene;
 
         return true;
diff --git a/test/unit/utIFCImportExport.cpp b/test/unit/utIFCImportExport.cpp
index 79edb8e01..20a11ca57 100644
--- a/test/unit/utIFCImportExport.cpp
+++ b/test/unit/utIFCImportExport.cpp
@@ -43,6 +43,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -50,7 +51,7 @@ class utIFCImportExport : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/IFC/AC14-FZK-Haus.ifc", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/IFC/AC14-FZK-Haus.ifc", aiProcess_ValidateDataStructure );
         return nullptr != scene;
 
         return true;
diff --git a/test/unit/utIssues.cpp b/test/unit/utIssues.cpp
index 2feef922b..a05adc856 100644
--- a/test/unit/utIssues.cpp
+++ b/test/unit/utIssues.cpp
@@ -44,6 +44,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/scene.h>
 #include <assimp/Importer.hpp>
 #include <assimp/Exporter.hpp>
+#include <assimp/postprocess.h>
 
 #include "TestModelFactory.h"
 
@@ -66,7 +67,7 @@ TEST_F( utIssues, OpacityBugWhenExporting_727 ) {
     EXPECT_NE( desc, nullptr );
     path.append( desc->fileExtension );
     EXPECT_EQ( AI_SUCCESS, exporter.Export( scene, desc->id, path ) );
-    const aiScene *newScene( importer.ReadFile( path, 0 ) );
+    const aiScene *newScene( importer.ReadFile( path, aiProcess_ValidateDataStructure ) );
     EXPECT_TRUE( NULL != newScene );
     float newOpacity;
     if ( newScene->mNumMaterials > 0 ) {
diff --git a/test/unit/utObjImportExport.cpp b/test/unit/utObjImportExport.cpp
index d9df779ac..dd8adcd80 100644
--- a/test/unit/utObjImportExport.cpp
+++ b/test/unit/utObjImportExport.cpp
@@ -193,7 +193,7 @@ protected:
 
     virtual bool importerTest() {
         ::Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/OBJ/spider.obj", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/OBJ/spider.obj", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 
@@ -202,7 +202,7 @@ protected:
     virtual bool exporterTest() {
         ::Assimp::Importer importer;
         ::Assimp::Exporter exporter;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/OBJ/spider.obj", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/OBJ/spider.obj", aiProcess_ValidateDataStructure );
         EXPECT_NE( nullptr, scene );
         EXPECT_EQ( aiReturn_SUCCESS, exporter.Export( scene, "obj", ASSIMP_TEST_MODELS_DIR "/OBJ/spider_test.obj" ) );
         EXPECT_EQ( aiReturn_SUCCESS, exporter.Export( scene, "objnomtl", ASSIMP_TEST_MODELS_DIR "/OBJ/spider_nomtl_test.obj" ) );
@@ -257,7 +257,7 @@ TEST_F( utObjImportExport, issue1111_no_mat_name_Test ) {
 
 TEST_F( utObjImportExport, issue809_vertex_color_Test ) {
     ::Assimp::Importer importer;
-    const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/OBJ/cube_with_vertexcolors.obj", 0 );
+    const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/OBJ/cube_with_vertexcolors.obj", aiProcess_ValidateDataStructure );
     EXPECT_NE( nullptr, scene );
 
 #ifndef ASSIMP_BUILD_NO_EXPORT
diff --git a/test/unit/utPMXImporter.cpp b/test/unit/utPMXImporter.cpp
index 72916b8ef..3a1ce1f6a 100644
--- a/test/unit/utPMXImporter.cpp
+++ b/test/unit/utPMXImporter.cpp
@@ -52,7 +52,7 @@ class utPMXImporter : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        /*const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/../models-nonbsd/MMD/Alicia_blade.pmx", 0 );
+        /*const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/../models-nonbsd/MMD/Alicia_blade.pmx", aiProcess_ValidateDataStructure );
         return nullptr != scene;*/
         return true;
     }
diff --git a/test/unit/utQ3DImportExport.cpp b/test/unit/utQ3DImportExport.cpp
index d8195309f..e656bc53c 100644
--- a/test/unit/utQ3DImportExport.cpp
+++ b/test/unit/utQ3DImportExport.cpp
@@ -44,6 +44,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -51,7 +52,7 @@ class utQ3DImportExport : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/Q3D/earth.q3o", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/Q3D/earth.q3o", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };
diff --git a/test/unit/utSIBImporter.cpp b/test/unit/utSIBImporter.cpp
index ecaa92f26..affa3c9ad 100644
--- a/test/unit/utSIBImporter.cpp
+++ b/test/unit/utSIBImporter.cpp
@@ -43,6 +43,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "SIBImporter.h"
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 #include "AbstractImportExportBase.h"
 
 using namespace ::Assimp;
@@ -51,7 +52,7 @@ class utSIBImporter : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/SIB/heffalump.sib", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/SIB/heffalump.sib", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };
diff --git a/test/unit/utSMDImportExport.cpp b/test/unit/utSMDImportExport.cpp
index 9139bb922..610d0c5d4 100644
--- a/test/unit/utSMDImportExport.cpp
+++ b/test/unit/utSMDImportExport.cpp
@@ -43,6 +43,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "SMDLoader.h"
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 #include "AbstractImportExportBase.h"
 
 using namespace ::Assimp;
@@ -51,7 +52,7 @@ class utSMDImporter : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/SMD/triangle.smd", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/SMD/triangle.smd", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };
@@ -73,6 +74,6 @@ TEST_F( utSMDImporter, importTest ) {
 
 TEST_F( utSMDImporter, issue_899_Texture_garbage_at_end_of_string_Test ) {
     Assimp::Importer importer;
-    const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/SMD/holy_grailref.smd", 0 );
+    const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/SMD/holy_grailref.smd", aiProcess_ValidateDataStructure );
     EXPECT_NE( nullptr, scene );
 }
diff --git a/test/unit/utSTLImportExport.cpp b/test/unit/utSTLImportExport.cpp
index 0ee3de955..2a3cceaf0 100644
--- a/test/unit/utSTLImportExport.cpp
+++ b/test/unit/utSTLImportExport.cpp
@@ -45,6 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -52,7 +53,7 @@ class utSTLImporterExporter : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/STL/Spider_ascii.stl", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/STL/Spider_ascii.stl", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };
@@ -63,6 +64,6 @@ TEST_F( utSTLImporterExporter, importXFromFileTest ) {
 
 TEST_F( utSTLImporterExporter, test_with_two_solids ) {
     Assimp::Importer importer;
-    const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/STL/triangle_with_two_solids.stl", 0 );
+    const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/STL/triangle_with_two_solids.stl", aiProcess_ValidateDataStructure );
     EXPECT_NE( nullptr, scene );
 }
diff --git a/test/unit/utX3DImportExport.cpp b/test/unit/utX3DImportExport.cpp
index a84c58efc..cb53b3292 100644
--- a/test/unit/utX3DImportExport.cpp
+++ b/test/unit/utX3DImportExport.cpp
@@ -45,6 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -52,7 +53,7 @@ class utX3DImportExport : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/X3D/ComputerKeyboard.x3d", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/X3D/ComputerKeyboard.x3d", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };
diff --git a/test/unit/utXImporterExporter.cpp b/test/unit/utXImporterExporter.cpp
index 042853d3d..4a6300d19 100644
--- a/test/unit/utXImporterExporter.cpp
+++ b/test/unit/utXImporterExporter.cpp
@@ -45,6 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -52,7 +53,7 @@ class utXImporterExporter : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/X/test.x", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/X/test.x", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };
diff --git a/test/unit/utglTF2ImportExport.cpp b/test/unit/utglTF2ImportExport.cpp
index fa69d648a..c6ccde406 100644
--- a/test/unit/utglTF2ImportExport.cpp
+++ b/test/unit/utglTF2ImportExport.cpp
@@ -44,6 +44,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <assimp/Importer.hpp>
 #include <assimp/Exporter.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -51,7 +52,7 @@ class utglTF2ImportExport : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF/BoxTextured.gltf", 0);
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF/BoxTextured.gltf", aiProcess_ValidateDataStructure);
         return nullptr != scene;
     }
 
@@ -59,7 +60,7 @@ public:
     virtual bool exporterTest() {
         Assimp::Importer importer;
         Assimp::Exporter exporter;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF/BoxTextured.gltf", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF/BoxTextured.gltf", aiProcess_ValidateDataStructure );
         EXPECT_NE( nullptr, scene );
         EXPECT_EQ( aiReturn_SUCCESS, exporter.Export( scene, "gltf2", ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF/BoxTextured_out.gltf" ) );
 
diff --git a/test/unit/utglTFImportExport.cpp b/test/unit/utglTFImportExport.cpp
index 18c348299..4e1f765a1 100644
--- a/test/unit/utglTFImportExport.cpp
+++ b/test/unit/utglTFImportExport.cpp
@@ -43,6 +43,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "AbstractImportExportBase.h"
 
 #include <assimp/Importer.hpp>
+#include <assimp/postprocess.h>
 
 using namespace Assimp;
 
@@ -50,7 +51,7 @@ class utglTFImportExport : public AbstractImportExportBase {
 public:
     virtual bool importerTest() {
         Assimp::Importer importer;
-        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/glTF/TwoBoxes/TwoBoxes.gltf", 0 );
+        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/glTF/TwoBoxes/TwoBoxes.gltf", aiProcess_ValidateDataStructure );
         return nullptr != scene;
     }
 };