Hi,
FYI, the GLES1 CTS is not public code, which is why it's not checked out by default. To check it out (assuming you have the right permissions), need to add this to your `.gclient` file:
```
"custom_vars": {
"checkout_angle_internal": True,
},
```
(or merge with existing `custom_vars`, if any). Then call `gclient sync`. In your build directory, need to add this to `
args.gn` to build it:
```
build_angle_gles1_conform_tests=true
```
Cheers,