diff --git a/tests/assets/modernizr/README.md b/tests/assets/modernizr/README.md
index bf3241283d..2a986d23d4 100644
--- a/tests/assets/modernizr/README.md
+++ b/tests/assets/modernizr/README.md
@@ -7,8 +7,8 @@
 
 ## Updating expectations
 
-1. `npx http-server .`
-1. Navigate to `http://127.0.0.1:8080/tests/assets/modernizr/index.html`
+1. Serve `tests/assets/modernizr/index.html` from a remote (localhost results will be different) https origin (e.g. https://pages.github.com).
+1. Navigate to `https://your-domain.com/tests/assets/modernizr/index.html`
 
 Do this with:
 
diff --git a/tests/assets/modernizr/mobile-safari-18.json b/tests/assets/modernizr/mobile-safari-18.json
index e86fc3de20..cd2822a65c 100644
--- a/tests/assets/modernizr/mobile-safari-18.json
+++ b/tests/assets/modernizr/mobile-safari-18.json
@@ -362,6 +362,7 @@
     "EXT_polygon_offset_clamp": true,
     "EXT_shader_texture_lod": true,
     "EXT_texture_filter_anisotropic": true,
+    "EXT_texture_mirror_clamp_to_edge": true,
     "EXT_sRGB": true,
     "KHR_parallel_shader_compile": true,
     "OES_element_index_uint": true,
@@ -371,6 +372,7 @@
     "OES_texture_half_float": true,
     "OES_texture_half_float_linear": true,
     "OES_vertex_array_object": true,
+    "WEBGL_blend_func_extended": true,
     "WEBGL_color_buffer_float": true,
     "WEBGL_compressed_texture_astc": true,
     "WEBGL_compressed_texture_etc": true,