diff --git a/dom/canvas/test/webgl-conf/generated-mochitest.ini b/dom/canvas/test/webgl-conf/generated-mochitest.ini
index 7afdfaf9a95e..1910b0a113f4 100644
--- a/dom/canvas/test/webgl-conf/generated-mochitest.ini
+++ b/dom/canvas/test/webgl-conf/generated-mochitest.ini
@@ -4510,7 +4510,6 @@ skip-if = (os == 'android' || os == 'linux' || (os == 'win' && os_version == '5.
 [generated/test_2_conformance2__glsl3__const-array-init.html]
 skip-if = (os == 'android' || os == 'linux' || (os == 'win' && os_version == '5.1'))
 [generated/test_2_conformance2__glsl3__forbidden-operators.html]
-fail-if = (os == 'mac') || (os == 'win')
 skip-if = (os == 'android' || os == 'linux' || (os == 'win' && os_version == '5.1'))
 [generated/test_2_conformance2__glsl3__frag-depth.html]
 skip-if = (os == 'android' || os == 'linux' || (os == 'win' && os_version == '5.1'))
@@ -5216,7 +5215,6 @@ skip-if = (os == 'android' || os == 'linux' || (os == 'win' && os_version == '5.
 [generated/test_2_conformance__glsl__misc__shaders-with-constant-expression-loop-conditions.html]
 skip-if = (os == 'android' || os == 'linux' || (os == 'win' && os_version == '5.1'))
 [generated/test_2_conformance__glsl__misc__shaders-with-invariance.html]
-fail-if = (os == 'mac')
 skip-if = (os == 'android' || os == 'linux' || (os == 'win' && os_version == '5.1'))
 [generated/test_2_conformance__glsl__misc__shaders-with-mis-matching-uniforms.html]
 skip-if = (os == 'android' || os == 'linux' || (os == 'win' && os_version == '5.1'))
@@ -6097,7 +6095,6 @@ skip-if = (os == 'android')
 skip-if = (os == 'android')
 [generated/test_conformance__glsl__bugs__pow-of-small-constant-in-user-defined-function.html]
 skip-if = (os == 'android')
-fail-if = (os == 'win' && os_version != '5.1')
 [generated/test_conformance__glsl__bugs__pow-with-constant-exponent-should-not-crash.html]
 [generated/test_conformance__glsl__bugs__qualcomm-crash.html]
 skip-if = (os == 'android')
@@ -6695,7 +6692,6 @@ skip-if = (os == 'mac') || (os == 'android') || (os == 'win')
 [generated/test_conformance__rendering__point-no-attributes.html]
 [generated/test_conformance__rendering__point-size.html]
 [generated/test_conformance__rendering__point-specific-shader-variables.html]
-fail-if = (os == 'win' && os_version != '5.1')
 [generated/test_conformance__rendering__point-with-gl-pointcoord-in-fragment-shader.html]
 [generated/test_conformance__rendering__polygon-offset.html]
 [generated/test_conformance__rendering__simple.html]
diff --git a/dom/canvas/test/webgl-conf/mochitest-errata.ini b/dom/canvas/test/webgl-conf/mochitest-errata.ini
index 4f8f21c67671..76a14267bb19 100644
--- a/dom/canvas/test/webgl-conf/mochitest-errata.ini
+++ b/dom/canvas/test/webgl-conf/mochitest-errata.ini
@@ -146,8 +146,6 @@ fail-if = (os == 'mac') || (os == 'win')
 fail-if = (os == 'mac')
 [generated/test_2_conformance__attribs__gl-vertexattribpointer.html]
 fail-if = (os == 'mac') || (os == 'win')
-[generated/test_2_conformance2__glsl3__forbidden-operators.html]
-fail-if = (os == 'mac') || (os == 'win')
 [generated/test_2_conformance2__vertex_arrays__vertex-array-object.html]
 fail-if = (os == 'mac') || (os == 'win')
 [generated/test_2_conformance__rendering__negative-one-index.html]
@@ -192,7 +190,6 @@ skip-if = (os == 'linux') || (os == 'android')
 # mozalloc_abort in libglsl.so
 skip-if = (os == 'linux') || (os == 'android')
 [generated/test_conformance__glsl__bugs__pow-of-small-constant-in-user-defined-function.html]
-fail-if = (os == 'win' && os_version != '5.1')
 skip-if = (os == 'android')
 ########################################################################
 # "tst-linux{32,64}-spot-NNN" Slaves:
@@ -550,8 +547,6 @@ fail-if = (os == 'mac')
 fail-if = (os == 'mac')
 [generated/test_conformance__glsl__misc__shaders-with-invariance.html]
 fail-if = (os == 'mac')
-[generated/test_2_conformance__glsl__misc__shaders-with-invariance.html]
-fail-if = (os == 'mac')
 
 [generated/test_2_conformance2__extensions__ext-color-buffer-float.html]
 skip-if = (os == 'mac' && debug)
@@ -679,8 +674,6 @@ skip-if = (os == 'win' && os_version == '6.2')
 
 ####################
 # failure on Windows
-[generated/test_conformance__rendering__point-specific-shader-variables.html]
-fail-if = (os == 'win' && os_version != '5.1')
 [generated/test_2_conformance__canvas__rapid-resizing.html]
 fail-if = (os == 'win' && os_version == '5.1')
 [generated/test_conformance__glsl__bugs__floor-div-cos-should-not-truncate.html]