diff --git a/test/images/tag.tvg b/test/images/tag.tvg
index d1db4ca6..c8338acc 100644
Binary files a/test/images/tag.tvg and b/test/images/tag.tvg differ
diff --git a/test/images/test.tvg b/test/images/test.tvg
index 0abd9c27..9a989b79 100644
Binary files a/test/images/test.tvg and b/test/images/test.tvg differ
diff --git a/test/testFill.cpp b/test/testFill.cpp
index 115e0517..8b4a2a81 100644
--- a/test/testFill.cpp
+++ b/test/testFill.cpp
@@ -27,6 +27,22 @@
 using namespace tvg;
 using namespace std;
 
+
+TEST_CASE("Filling Creation", "[tvgFill]")
+{
+    auto linear = LinearGradient::gen();
+    REQUIRE(linear);
+
+    REQUIRE(linear->identifier() == LinearGradient::identifier());
+    REQUIRE(linear->identifier() != RadialGradient::identifier());
+
+    auto radial = RadialGradient::gen();
+    REQUIRE(radial);
+
+    REQUIRE(radial->identifier() == RadialGradient::identifier());
+    REQUIRE(radial->identifier() != LinearGradient::identifier());
+}
+
 TEST_CASE("Common Filling", "[tvgFill]")
 {
     auto fill = LinearGradient::gen();
diff --git a/test/testPicture.cpp b/test/testPicture.cpp
index 3e7c1bab..358d63df 100644
--- a/test/testPicture.cpp
+++ b/test/testPicture.cpp
@@ -28,6 +28,17 @@
 using namespace tvg;
 using namespace std;
 
+
+TEST_CASE("Picture Creation", "[tvgPicture]")
+{
+    auto picture = Picture::gen();
+    REQUIRE(picture);
+
+    REQUIRE(picture->identifier() == Picture::identifier());
+    REQUIRE(picture->identifier() != Shape::identifier());
+    REQUIRE(picture->identifier() != Scene::identifier());
+}
+
 TEST_CASE("Load SVG file", "[tvgPicture]")
 {
     auto picture = Picture::gen();
diff --git a/test/testScene.cpp b/test/testScene.cpp
index 17fa3e55..d7030e54 100644
--- a/test/testScene.cpp
+++ b/test/testScene.cpp
@@ -29,6 +29,10 @@ TEST_CASE("Scene Creation", "[tvgScene]")
 {
     auto scene = Scene::gen();
     REQUIRE(scene);
+
+    REQUIRE(scene->identifier() == Scene::identifier());
+    REQUIRE(scene->identifier() != Shape::identifier());
+    REQUIRE(scene->identifier() != Picture::identifier());
 }
 
 TEST_CASE("Pushing Paints Into Scene", "[tvgScene]")
diff --git a/test/testShape.cpp b/test/testShape.cpp
index 529ee738..1415021d 100644
--- a/test/testShape.cpp
+++ b/test/testShape.cpp
@@ -25,6 +25,15 @@
 
 using namespace tvg;
 
+TEST_CASE("Shape Creation", "[tvgShape]")
+{
+    auto shape = Shape::gen();
+    REQUIRE(shape);
+
+    REQUIRE(shape->identifier() == Shape::identifier());
+    REQUIRE(shape->identifier() != Picture::identifier());
+    REQUIRE(shape->identifier() != Scene::identifier());
+}
 
 TEST_CASE("Appending Commands", "[tvgShape]")
 {