`$JOBS` does not set in `env:`

.github/workflows/macos.yml

@@ -41,16 +41,13 @@ jobs:
         run: ./configure -C --disable-install-doc --with-openssl-dir=$(brew --prefix openssl@1.1) --with-readline-dir=$(brew --prefix readline)
       - run: make $JOBS
       - name: Tests
-        run: make -s ${{ matrix.test_task }}
+        run: make -s ${{ matrix.test_task }} TESTOPTS="$JOBS -q --tty=no"
         env:
-          RUBY_TESTOPTS: "$JOBS -q --tty=no"
           MSPECOPT: "-ff" # not using `-j` because sometimes `mspec -j` silently dies
         if: matrix.test_task != 'test-bundled-gems' && !contains(github.event.head_commit.message, '[ci skip]')
       # test-bundled-gems is separated for marking `continue-on-error` because it randomly fails.
       - name: Tests
-        run: make -s ${{ matrix.test_task }}
-        env:
-          RUBY_TESTOPTS: "$JOBS -q --tty=no"
+        run: make -s ${{ matrix.test_task }} TESTOPTS="$JOBS -q --tty=no"
         continue-on-error: true
         if: matrix.test_task == 'test-bundled-gems' && !contains(github.event.head_commit.message, '[ci skip]')
       - name: Leaked Globals

.github/workflows/ubuntu.yml

@@ -44,9 +44,8 @@ jobs:
         run: ./configure -C --disable-install-doc
       - run: make $JOBS
       - name: Tests
-        run: make -s ${{ matrix.test_task }}
+        run: make -s ${{ matrix.test_task }} TESTOPTS="$JOBS -q --tty=no"
         env:
-          RUBY_TESTOPTS: "$JOBS -q --tty=no"
           MSPECOPT: "-ff" # not using `-j` because sometimes `mspec -j` silently dies
         if: matrix.test_task != 'test-bundled-gems' && !contains(github.event.head_commit.message, '[ci skip]')
       # test-bundled-gems is separated for marking `continue-on-error` because it randomly fails.