Pull in latest tests

scripts/test/shared.py

diff --git a/scripts/test/shared.py b/scripts/test/shared.py
index 48f10b5..66ca4a2 100644
--- a/scripts/test/shared.py
+++ b/scripts/test/shared.py
@@ -398,6 +398,7 @@
 SPEC_TESTSUITE_PROPOSALS_TO_SKIP = [
     'custom-page-sizes',
     'wide-arithmetic',
+    'custom-descriptors',
 ]
 
 # Paths are relative to the test/spec/testsuite directory

test/spec/testsuite

diff --git a/test/spec/testsuite b/test/spec/testsuite
index 4b24564..c337f0d 160000
--- a/test/spec/testsuite
+++ b/test/spec/testsuite
@@ -1 +1 @@
-Subproject commit 4b24564c844e3d34bf46dfcb3c774ee5163e31cc
+Subproject commit c337f0da6477acd40fbcab98671a68f59106ad86