diff --git a/test/unit/utglTF2ImportExport.cpp b/test/unit/utglTF2ImportExport.cpp
index f3c861ba5..29d63d81d 100644
--- a/test/unit/utglTF2ImportExport.cpp
+++ b/test/unit/utglTF2ImportExport.cpp
@@ -276,7 +276,7 @@ TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeLineLoop) {
     const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_09.gltf", aiProcess_ValidateDataStructure);
     EXPECT_NE(nullptr, scene);
     EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4u);
-    std::array<int, 5> l1 = {{ 0, 3u, 2u, 1u, 0u }};
+    std::array<unsigned int, 5> l1 = {{ 0, 3u, 2u, 1u, 0u }};
     EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 2u);
     for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i)
     {
@@ -291,7 +291,7 @@ TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeLineStrip) {
     const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_10.gltf", aiProcess_ValidateDataStructure);
     EXPECT_NE(nullptr, scene);
     EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4u);
-    std::array<int, 5> l1 = {{ 0u, 3u, 2u, 1u, 0u }};
+    std::array<unsigned int, 5> l1 = {{ 0u, 3u, 2u, 1u, 0u }};
     EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 2u);
     for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i) {
         EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], l1[i]);
@@ -306,13 +306,13 @@ TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeTrianglesStrip) {
     EXPECT_NE(nullptr, scene);
     EXPECT_EQ(scene->mMeshes[0]->mNumFaces, 2u);
     EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4u);
-    std::array<int, 3> f1 = {{ 0u, 3u, 1u }};
+    std::array<unsigned int, 3> f1 = {{ 0u, 3u, 1u }};
     EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 3u);
     for (size_t i = 0; i < 3; ++i) {
         EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mIndices[i], f1[i]);
     }
 
-    std::array<int, 3> f2 = {{ 1u, 3u, 2u }};
+    std::array<unsigned int, 3> f2 = {{ 1u, 3u, 2u }};
     EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mNumIndices, 3u);
     for (size_t i = 0; i < 3; ++i) {
         EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mIndices[i], f2[i]);
@@ -326,7 +326,7 @@ TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeTrianglesFan) {
     EXPECT_NE(nullptr, scene);
     EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4u);
     EXPECT_EQ(scene->mMeshes[0]->mNumFaces, 2u);
-    std::array<int, 3> f1 = {{ 0u, 3u, 2u }};
+    std::array<unsigned int, 3> f1 = {{ 0u, 3u, 2u }};
     EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 3);
     for (size_t i = 0; i < 3; ++i) {
         EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mIndices[i], f1[i]);