diff --git a/wercker.yml b/wercker.yml
index a499a05d85..d6c90ed1ae 100644
--- a/wercker.yml
+++ b/wercker.yml
@@ -9,29 +9,27 @@ build:
     - script:
         name: show last commit
         code: git log -n1
-
-    # Pending for https://app.wercker.com/ruby/ruby/runs/build/5bce69356326620007fbaa5c?step=5bce697cacc4510006d30a47
-    # I'll fix and enable this later.
-
-    # - script:
-    #     name: configure
-    #     code: /usr/bin/sudo -H -u test -- bash -c 'autoconf && ./configure --disable-install-doc --prefix=/tmp/ruby-prefix'
-    # - script:
-    #     name: make all install
-    #     code: /usr/bin/sudo -H -u test -- bash -c 'make -j$(nproc) all install'
-    # - script:
-    #     name: make test (JIT)
-    #     code: /usr/bin/sudo -H -u test -- bash -c 'make test RUN_OPTS="--disable-gems --jit-wait --jit-warnings"'
-    # - script:
-    #     name: make test-all (JIT)
-    #     code: /usr/bin/sudo -H -u test -- bash -c 'make test-all TESTOPTS="--color=never --job-status=normal" RUN_OPTS="--disable-gems --jit-wait --jit-warnings" RUBY_FORCE_TEST_JIT=1'
-    # - script:
-    #     name: make test-spec (JIT)
-    #     code: /usr/bin/sudo -H -u test -- bash -c 'make test-spec RUN_OPTS="--disable-gems --jit-wait --jit-warnings"'
+    - script:
+        name: change owner to test user # using "test" user because some test-all tests fail with root user.
+        code: chown -R test:test .
+    - script:
+        name: configure
+        code: /usr/bin/sudo -H -u test -- bash -c 'autoconf && ./configure --disable-install-doc --prefix=/tmp/ruby-prefix'
+    - script:
+        name: make all install
+        code: /usr/bin/sudo -H -u test -- bash -c 'make -j$(nproc) all install'
+    - script:
+        name: make test (JIT)
+        code: /usr/bin/sudo -H -u test -- bash -c 'make test RUN_OPTS="--disable-gems --jit-wait --jit-warnings"'
+    - script:
+        name: make test-all (JIT)
+        code: /usr/bin/sudo -H -u test -- bash -c 'make test-all TESTOPTS="--color=never --job-status=normal" RUN_OPTS="--disable-gems --jit-wait --jit-warnings" RUBY_FORCE_TEST_JIT=1'
+    - script:
+        name: make test-spec (JIT)
+        code: /usr/bin/sudo -H -u test -- bash -c 'make test-spec RUN_OPTS="--disable-gems --jit-wait --jit-warnings"'
   after-steps:
     - wantedly/pretty-slack-notify:
       webhook_url: $SLACK_WEBHOOK_URL
       channel: alerts
-      username: mjit-test
       notify_on: "failed"
       branches: ^trunk$