diff --git a/.github/workflows/ci_on_ubuntu.yml b/.github/workflows/ci_on_ubuntu.yml
index 824a6c974c4..de2a05796b9 100644
--- a/.github/workflows/ci_on_ubuntu.yml
+++ b/.github/workflows/ci_on_ubuntu.yml
@@ -106,23 +106,21 @@ jobs:
       max-parallel: 20
       matrix:
         os: [ubuntu-latest]
-        # python-version: [3.8, 3.9, "3.10"]
-        # pytorch-version: [2.0.1, 2.1.0]
-        python-version: ["3.10"]
-        pytorch-version: [2.1.0]
+        python-version: [3.8, 3.9, "3.10"]
+        pytorch-version: [2.0.1, 2.1.0]
         chainer-version: [6.0.0]
         use-conda: [false]
-        # include:
-        #   - os: ubuntu-latest
-        #     python-version: "3.7"
-        #     pytorch-version: 1.12.1
-        #     chainer-verssion: 6.0.0
-        #     use-conda: false
-        #   - os: ubuntu-latest
-        #     python-version: "3.7"
-        #     pytorch-version: 1.13.1
-        #     chainer-verssion: 6.0.0
-        #     use-conda: false
+        include:
+          - os: ubuntu-latest
+            python-version: "3.7"
+            pytorch-version: 1.12.1
+            chainer-verssion: 6.0.0
+            use-conda: false
+          - os: ubuntu-latest
+            python-version: "3.7"
+            pytorch-version: 1.13.1
+            chainer-verssion: 6.0.0
+            use-conda: false
     steps:
       - uses: actions/checkout@master
       - uses: actions/cache@v3
@@ -150,9 +148,9 @@ jobs:
         run: |
           ./ci/install.sh
 
-      # - name: test shell
-      #   run: |
-      #     ./ci/test_shell_espnet2.sh
+      - name: test shell
+        run: |
+          ./ci/test_shell_espnet2.sh
 
       - name: test python
         run: ./ci/test_python_espnet2.sh
@@ -197,16 +195,16 @@ jobs:
       max-parallel: 20
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.10"]
-        pytorch-version: [2.1.0]
+        python-version: [3.7]
+        pytorch-version: [1.13.1]
         chainer-version: [6.0.0]
         use-conda: [false]
-        # include:
-        #   - os: ubuntu-latest
-        #     python-version: "3.10"
-        #     pytorch-version: 2.1.0
-        #     chainer-verssion: 6.0.0
-        #     use-conda: false
+        include:
+          - os: ubuntu-latest
+            python-version: "3.10"
+            pytorch-version: 2.1.0
+            chainer-verssion: 6.0.0
+            use-conda: false
     steps:
       - uses: actions/checkout@master
       - uses: actions/cache@v3