diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 25b60bde1d2..5cf34aebf90 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -78066,11 +78066,11 @@
    "support"
   ],
   "webgl/conformance-1.0.3/conformance/ogles/GL/struct/nestedstructcomb_various_frag.frag": [
-   "dcc9d901d33b5e726688a48eb7253de9abafa626",
+   "2cc51cfb64432e3fdffbc8929432e3a3fce83dcb",
    "support"
   ],
   "webgl/conformance-1.0.3/conformance/ogles/GL/struct/nestedstructcomb_various_vert.vert": [
-   "459d4d81d1717887b2a09ee46f94328ba350a059",
+   "e27de221f52b98da1bd0589e9ef587237d0afb37",
    "support"
   ],
   "webgl/conformance-1.0.3/conformance/ogles/GL/struct/struct_001_to_008.html": [
@@ -82618,7 +82618,7 @@
    "support"
   ],
   "webgl/conformance-2.0.0/conformance/more/unit.js": [
-   "a0614128f0ab91acc0aa2aa3ef6232ac5206dc2a",
+   "51433f33e84ccbd671f5fec20d961b3ac0701b3f",
    "support"
   ],
   "webgl/conformance-2.0.0/conformance/more/util.js": [
@@ -87626,11 +87626,11 @@
    "support"
   ],
   "webgl/conformance-2.0.0/conformance/ogles/GL/struct/nestedstructcomb_various_frag.frag": [
-   "feb6532ed406514db669bbc30d144c84d70483f3",
+   "151888a883644f8205d8bb0fe6307c903c67f3c1",
    "support"
   ],
   "webgl/conformance-2.0.0/conformance/ogles/GL/struct/nestedstructcomb_various_vert.vert": [
-   "a84aeb9dfa707663f0581344cdcb05fd34fcd5d1",
+   "ddc2610fdd7794df32393ffccc3d1d4de3379ae3",
    "support"
   ],
   "webgl/conformance-2.0.0/conformance/ogles/GL/struct/struct_001_to_008.html": [
diff --git a/tests/wpt/mozilla/tests/webgl/conformance-1.0.3/conformance/ogles/GL/struct/nestedstructcomb_various_frag.frag b/tests/wpt/mozilla/tests/webgl/conformance-1.0.3/conformance/ogles/GL/struct/nestedstructcomb_various_frag.frag
index dcc9d901d33..2cc51cfb644 100644
--- a/tests/wpt/mozilla/tests/webgl/conformance-1.0.3/conformance/ogles/GL/struct/nestedstructcomb_various_frag.frag
+++ b/tests/wpt/mozilla/tests/webgl/conformance-1.0.3/conformance/ogles/GL/struct/nestedstructcomb_various_frag.frag
@@ -28,7 +28,7 @@ precision mediump float;
 #endif
 varying vec4 color;
 
-#define ERROR_EPSILON 0.1
+#define ERROR_EPSILON 0.125
 
 void main (void){
       struct second_nest
diff --git a/tests/wpt/mozilla/tests/webgl/conformance-1.0.3/conformance/ogles/GL/struct/nestedstructcomb_various_vert.vert b/tests/wpt/mozilla/tests/webgl/conformance-1.0.3/conformance/ogles/GL/struct/nestedstructcomb_various_vert.vert
index 459d4d81d17..e27de221f52 100644
--- a/tests/wpt/mozilla/tests/webgl/conformance-1.0.3/conformance/ogles/GL/struct/nestedstructcomb_various_vert.vert
+++ b/tests/wpt/mozilla/tests/webgl/conformance-1.0.3/conformance/ogles/GL/struct/nestedstructcomb_various_vert.vert
@@ -27,7 +27,7 @@ attribute vec4 gtf_Vertex;
 uniform mat4 gtf_ModelViewProjectionMatrix;
 varying vec4 color;
 
-#define ERROR_EPSILON 0.1
+#define ERROR_EPSILON 0.125
 
 void main (void)
 {
diff --git a/tests/wpt/mozilla/tests/webgl/conformance-2.0.0/conformance/more/unit.js b/tests/wpt/mozilla/tests/webgl/conformance-2.0.0/conformance/more/unit.js
index a0614128f0a..51433f33e84 100644
--- a/tests/wpt/mozilla/tests/webgl/conformance-2.0.0/conformance/more/unit.js
+++ b/tests/wpt/mozilla/tests/webgl/conformance-2.0.0/conformance/more/unit.js
@@ -53,6 +53,10 @@ if (window.internals) {
   window.internals.settings.setWebGLErrorsToConsoleEnabled(false);
 }
 
+if (window.async_test) {
+    var __overall_test = async_test('Overall test');
+}
+
 /* -- end platform specific code --*/
 Tests = {
   autorun : true,
@@ -949,6 +953,9 @@ function notifyFinishedToHarness() {
   if (window.parent.webglTestHarness) {
     window.parent.webglTestHarness.notifyFinished(window.location.pathname);
   }
+  if (window.__overall_test) {
+    window.__overall_test.done();
+  }
 }
 
 function initTests() {
diff --git a/tests/wpt/mozilla/tests/webgl/conformance-2.0.0/conformance/ogles/GL/struct/nestedstructcomb_various_frag.frag b/tests/wpt/mozilla/tests/webgl/conformance-2.0.0/conformance/ogles/GL/struct/nestedstructcomb_various_frag.frag
index feb6532ed40..151888a8836 100644
--- a/tests/wpt/mozilla/tests/webgl/conformance-2.0.0/conformance/ogles/GL/struct/nestedstructcomb_various_frag.frag
+++ b/tests/wpt/mozilla/tests/webgl/conformance-2.0.0/conformance/ogles/GL/struct/nestedstructcomb_various_frag.frag
@@ -28,7 +28,7 @@ precision mediump float;
 #endif
 varying vec4 color;
 
-#define ERROR_EPSILON 0.1
+#define ERROR_EPSILON 0.125
 
 void main (void){
   	struct second_nest
diff --git a/tests/wpt/mozilla/tests/webgl/conformance-2.0.0/conformance/ogles/GL/struct/nestedstructcomb_various_vert.vert b/tests/wpt/mozilla/tests/webgl/conformance-2.0.0/conformance/ogles/GL/struct/nestedstructcomb_various_vert.vert
index a84aeb9dfa7..ddc2610fdd7 100644
--- a/tests/wpt/mozilla/tests/webgl/conformance-2.0.0/conformance/ogles/GL/struct/nestedstructcomb_various_vert.vert
+++ b/tests/wpt/mozilla/tests/webgl/conformance-2.0.0/conformance/ogles/GL/struct/nestedstructcomb_various_vert.vert
@@ -27,7 +27,7 @@ attribute vec4 gtf_Vertex;
 uniform mat4 gtf_ModelViewProjectionMatrix;
 varying vec4 color;
 
-#define ERROR_EPSILON 0.1
+#define ERROR_EPSILON 0.125
 
 void main (void)
 {