diff --git a/.github/workflows/cruby-bindings.yml b/.github/workflows/cruby-bindings.yml
index 1312293c32..a13a691b99 100644
--- a/.github/workflows/cruby-bindings.yml
+++ b/.github/workflows/cruby-bindings.yml
@@ -40,8 +40,8 @@ jobs:
           ruby tool/downloader.rb -d tool -e gnu config.guess config.sub
           autoconf
           ./configure -C --disable-install-doc
-          make -j2
+          make -j$(nproc)
         working-directory: ruby/ruby
       - name: make test-all
-        run: make -j2 -s test-all TESTS="prism ruby/test_syntax.rb ruby/test_compile_prism.rb --no-retry"
+        run: make -j$(nproc) -s test-all
         working-directory: ruby/ruby