Some opengles dart engine tests are currently skipped because they fail with an error related to runtime stage data for the runtime shaders that the tests use. One example of a failure message:

  Exception: Asset 'blue_green_sampler.frag.iplr' does not contain appropriate runtime stage data for current backend (OpenGLES3).
  Found stages: SkSL Metal OpenGLES Vulkan

The following tests have this behavior:

fragment_shader_test.dart
high_bitrate_texture_test.dart