diff --git a/.github/workflows/yjit-macos.yml b/.github/workflows/yjit-macos.yml
index be0f3c8986..e84b5fb662 100644
--- a/.github/workflows/yjit-macos.yml
+++ b/.github/workflows/yjit-macos.yml
@@ -5,7 +5,7 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        test_task: [ "check", "test-bundler-parallel" ] #, "test-bundled-gems" ]
+        test_task: [ "check" ] #, "test-bundler-parallel" ] #, "test-bundled-gems" ]
         yjit_opts: [
           "--yjit",
           "--yjit --yjit-call-threshold=1 --yjit-max-versions=1",
diff --git a/.github/workflows/yjit-ubuntu.yml b/.github/workflows/yjit-ubuntu.yml
index 93e12b725f..4473e149a9 100644
--- a/.github/workflows/yjit-ubuntu.yml
+++ b/.github/workflows/yjit-ubuntu.yml
@@ -4,7 +4,7 @@ jobs:
   make:
     strategy:
       matrix:
-        test_task: ["check", "test-bundler-parallel", "test-bundled-gems", "test-all", "test-spec"]
+        test_task: ["check", "test-bundled-gems", "test-all", "test-spec"] # "test-bundler-parallel",
         os:
           - ubuntu-20.04
 #         - ubuntu-18.04