diff --git a/.bazelrc b/.bazelrc
index 93fcb0c164..0ae082f004 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -190,7 +190,7 @@ common:ci-windows-cross --strategy=TestRunner=local
 # V8 embeds IsolateData offsets in snapshot builtins; Windows snapshots must be
 # generated by a Windows mksnapshot binary rather than the Linux RBE host tool.
 common:ci-windows-cross --strategy=V8Mksnapshot=local
-common:ci-windows-cross --local_test_jobs=8
+common:ci-windows-cross --local_test_jobs=12
 common:ci-windows-cross --test_env=RUST_TEST_THREADS=1
 # Native Windows CI still covers the PowerShell parser-process tests. The
 # cross-built gnullvm binaries currently hang in those tests when run on the
diff --git a/.github/workflows/bazel.yml b/.github/workflows/bazel.yml
index 5137c0aa0b..0f025c2cbc 100644
--- a/.github/workflows/bazel.yml
+++ b/.github/workflows/bazel.yml
@@ -230,7 +230,7 @@ jobs:
             --test_env=CODEX_BAZEL_TEST_CACHE_BUST=${GITHUB_SHA}
             --build_metadata=COMMIT_SHA=${GITHUB_SHA}
             --build_metadata=TAG_windows_test_shard=${BAZEL_TEST_SHARD}
-            --build_metadata=TAG_windows_local_test_jobs=8
+            --build_metadata=TAG_windows_local_test_jobs=12
             --profile=${RUNNER_TEMP}/windows-bazel-profile-shard-${BAZEL_TEST_SHARD}.gz
             --noslim_profile
           )