tests: Include HOST_VISIBLE mem prop for --show-images
diff --git a/tests/vktestframework.cpp b/tests/vktestframework.cpp
index 5792ecf..85096ae 100644
--- a/tests/vktestframework.cpp
+++ b/tests/vktestframework.cpp
@@ -564,7 +564,8 @@
         m_display_image->m_presentableMemory = persistent_images[x].memory;
 
         vk_testing::Buffer buf;
-        buf.init(m_device, (VkDeviceSize) m_display_image->m_data_size);
+        VkMemoryPropertyFlags flags = VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT;
+        buf.init(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();