tests: On init, specify if buffer is src or dst
diff --git a/tests/vktestframework.cpp b/tests/vktestframework.cpp
index be39d2d..fb5ded6 100644
--- a/tests/vktestframework.cpp
+++ b/tests/vktestframework.cpp
@@ -462,8 +462,7 @@
     }
 
     VkMemoryPropertyFlags flags = VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT;
-    flags |= VK_BUFFER_USAGE_TRANSFER_SOURCE_BIT;
-    buf.init(m_device, (VkDeviceSize)m_display_image->m_data_size, flags);
+    buf.init_as_src(m_device, (VkDeviceSize)m_display_image->m_data_size, flags);
     dest_ptr = buf.map();
     memcpy(dest_ptr, m_display_image->m_data, m_display_image->m_data_size);
     buf.unmap();