--- a/dom/canvas/test/webgl-conf/mochitest-errata.ini
+++ b/dom/canvas/test/webgl-conf/mochitest-errata.ini
@@ -402,14 +402,21 @@ fail-if = (os == 'mac' && os_version == 
 [generated/test_conformance__glsl__variables__gl-pointcoord.html]
 fail-if = (os == 'mac' && os_version == '10.8')
 [generated/test_conformance__limits__gl-max-texture-dimensions.html]
 fail-if = (os == 'mac' && os_version == '10.8')
 
 ########################################################################
 ########################################################################
 # Win
-
+[generated/test_2_conformance__ogles__GL__built_in_varying_array_out_of_bounds__built_in_varying_array_out_of_bounds_001_to_001.html]
+# time out crash
+skip-if = (os == 'win')
+[generated/test_conformance__ogles__GL__built_in_varying_array_out_of_bounds__built_in_varying_array_out_of_bounds_001_to_001.html]
+# time out crash
+skip-if = (os == 'win')
+[generated/test_2_conformance2__glsl3__vector-dynamic-indexing.html]
+skip-if = (os == 'win')
 [generated/test_conformance__glsl__misc__large-loop-compile.html]
 fail-if = (os == 'win' && os_version == '5.1')
 [generated/test_conformance__uniforms__uniform-values-per-program.html]
 # Crashes on D3D11 debug.
 skip-if = (os == 'win' && os_version != '5.1')