Shaders: this SKIP was too early.

src/Magnum/Shaders/Test/VertexColorGLTest.cpp

@@ -311,10 +311,6 @@ template<class T> void VertexColorGLTest::render2D() {
 template<class T> void VertexColorGLTest::render3D() {
     setTestCaseTemplateName(T::Size == 3 ? "Color3" : "Color4");
 
-    if(!(_manager.loadState("AnyImageImporter") & PluginManager::LoadState::Loaded) ||
-       !(_manager.loadState("TgaImporter") & PluginManager::LoadState::Loaded))
-        CORRADE_SKIP("AnyImageImporter / TgaImporter plugins not found.");
-
     Trade::MeshData sphereData = Primitives::uvSphereSolid(16, 32,
         Primitives::UVSphereFlag::TextureCoordinates);
 
@@ -338,6 +334,10 @@ template<class T> void VertexColorGLTest::render3D() {
 
     MAGNUM_VERIFY_NO_GL_ERROR();
 
+    if(!(_manager.loadState("AnyImageImporter") & PluginManager::LoadState::Loaded) ||
+       !(_manager.loadState("TgaImporter") & PluginManager::LoadState::Loaded))
+        CORRADE_SKIP("AnyImageImporter / TgaImporter plugins not found.");
+
     #if !(defined(MAGNUM_TARGET_GLES2) && defined(MAGNUM_TARGET_WEBGL))
     /* AMD has one different pixel compared to Intel, SwiftShader has
        differently rasterized edges on five pixels. Apple A8 some more. */