Test fetch with browser64_4gb

.circleci/config.yml

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 8be8770..a02ec22 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -808,11 +808,7 @@
           # skip test_4gb_fail as it OOMs on the current bot
           # Run a few tests in browser64_4gb mode too.
           test_targets: "
-            browser64
-            skip:browser64.test_4gb_fail
-            browser64_4gb.test_async_*
-            browser64_4gb.test_audio_worklet*
-            browser64_4gb.test_emscripten_log
+            browser64_4gb.test_fetch_*
             "
   test-browser-firefox:
     executor: bionic