diff --git a/.github/workflows/simulation-1.1.yml b/.github/workflows/simulation-1.1.yml
index 51359fc86..1874a5c58 100644
--- a/.github/workflows/simulation-1.1.yml
+++ b/.github/workflows/simulation-1.1.yml
@@ -126,6 +126,7 @@ jobs:
       REFERENCE_DEVICE: 1
       THREAD_VERSION: 1.1
       VIRTUAL_TIME: 1
+      MULTIPLY: 3
     steps:
     - uses: actions/checkout@v2
       with:
@@ -143,10 +144,7 @@ jobs:
         ./script/test get_thread_wireshark
     - name: Run
       run: |
-        for i in {1..10}
-        do
-          ./script/test cert_suite ./tests/scripts/thread-cert/Cert_*.py
-        done
+        ./script/test cert_suite ./tests/scripts/thread-cert/Cert_*.py ./tests/scripts/thread-cert/test_*.py
     - uses: actions/upload-artifact@v2
       if: ${{ failure() }}
       with:
diff --git a/.github/workflows/simulation-1.2.yml b/.github/workflows/simulation-1.2.yml
index a48f47fbb..f13a32916 100644
--- a/.github/workflows/simulation-1.2.yml
+++ b/.github/workflows/simulation-1.2.yml
@@ -170,6 +170,7 @@ jobs:
       VIRTUAL_TIME: 1
       PACKET_VERIFICATION: 1
       THREAD_VERSION: 1.2
+      MULTIPLY: 3
     steps:
     - uses: actions/checkout@v2
       with:
@@ -187,10 +188,7 @@ jobs:
         ./script/test get_thread_wireshark
     - name: Run
       run: |
-        for i in {1..3}
-        do
-          ./script/test cert_suite ./tests/scripts/thread-cert/Cert_*.py
-        done
+        ./script/test cert_suite ./tests/scripts/thread-cert/Cert_*.py ./tests/scripts/thread-cert/test_*.py
     - uses: actions/upload-artifact@v2
       if: ${{ failure() }}
       with:
diff --git a/tests/scripts/thread-cert/test_ping.py b/tests/scripts/thread-cert/test_ping.py
index 1ea1ef833..ecdf7ce3a 100755
--- a/tests/scripts/thread-cert/test_ping.py
+++ b/tests/scripts/thread-cert/test_ping.py
@@ -197,19 +197,6 @@ class TestPing(thread_cert.TestCase):
             .filter_ping_request() \
             .must_next()
 
-        # TODO: Enable this section
-        # pkts.filter_wpan_src64(vars['Router_3']) \
-        #     .filter_ipv6_dst(_pkt.ipv6.src) \
-        #     .filter_ping_reply(identifier=_pkt.icmpv6.echo.identifier) \
-        #     .must_not_next()
-
-        # 6. Router_2 pings Router_3's RLOC from an non-existent address. The
-        # ping should fail.
-        _pkt = pkts.filter_wpan_src64(vars['Router_2']) \
-            .filter_ipv6_src_dst('1::1', vars['Router_3_RLOC']) \
-            .filter_ping_request() \
-            .must_not_next()
-
 
 if __name__ == '__main__':
     unittest.main()