diff --git a/test/unit/ut3DImportExport.cpp b/test/unit/ut3DImportExport.cpp
index 2d42d2829..922d8c747 100644
--- a/test/unit/ut3DImportExport.cpp
+++ b/test/unit/ut3DImportExport.cpp
@@ -55,3 +55,17 @@ TEST(ut3DImportExport, importBoxA) {
     const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/3D/box_a.3d", aiProcess_ValidateDataStructure);
     ASSERT_NE(nullptr, scene);
 }
+
+
+TEST(ut3DImportExport, importBoxD) {
+    Assimp::Importer importer;
+    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/3D/box_d.3d", aiProcess_ValidateDataStructure);
+    ASSERT_NE(nullptr, scene);
+}
+
+
+TEST(ut3DImportExport, importBoxUC) {
+    Assimp::Importer importer;
+    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/3D/box.uc", aiProcess_ValidateDataStructure);
+    ASSERT_NE(nullptr, scene);
+}