diff --git a/.github/workflows/dm_binlog_999999.yaml b/.github/workflows/dm_binlog_999999.yaml
index 439480034b0..6dcfde5ff26 100644
--- a/.github/workflows/dm_binlog_999999.yaml
+++ b/.github/workflows/dm_binlog_999999.yaml
@@ -121,9 +121,3 @@ jobs:
         uses: Ilshidur/action-slack@2.1.0
         with:
           args: "binlog 999999 failed, see https://github.com/pingcap/tiflow/actions/runs/{{ GITHUB_RUN_ID }}"
-
-      # Debug via SSH if previous steps failed
-      - name: Set up tmate session
-        if: ${{ failure() }}
-        uses: mxschmitt/action-tmate@v3
-        timeout-minutes: 30
diff --git a/.github/workflows/dm_chaos.yaml b/.github/workflows/dm_chaos.yaml
index c699404565e..e8e54144882 100644
--- a/.github/workflows/dm_chaos.yaml
+++ b/.github/workflows/dm_chaos.yaml
@@ -305,9 +305,3 @@ jobs:
         uses: Ilshidur/action-slack@2.1.0
         with:
           args: "chaos job failed, see https://github.com/pingcap/tiflow/actions/runs/{{ GITHUB_RUN_ID }}"
-
-      # Debug via SSH if previous steps failed
-      - name: Set up tmate session
-        if: ${{ failure() }}
-        uses: mxschmitt/action-tmate@v3
-        timeout-minutes: 15
diff --git a/.github/workflows/dm_upstream_switch.yaml b/.github/workflows/dm_upstream_switch.yaml
index 15d14e7a727..9f8e25f4f4d 100644
--- a/.github/workflows/dm_upstream_switch.yaml
+++ b/.github/workflows/dm_upstream_switch.yaml
@@ -82,9 +82,3 @@ jobs:
         uses: Ilshidur/action-slack@2.1.0
         with:
           args: "upstream-switch job failed, see https://github.com/pingcap/tiflow/actions/runs/{{ GITHUB_RUN_ID }}"
-
-      # Debug via SSH if previous steps failed
-      - name: Set up tmate session
-        if: ${{ failure() }}
-        uses: mxschmitt/action-tmate@v3
-        timeout-minutes: 30
diff --git a/.github/workflows/upgrade_dm_via_tiup.yaml b/.github/workflows/upgrade_dm_via_tiup.yaml
index d26000f716b..3f5cf93b350 100644
--- a/.github/workflows/upgrade_dm_via_tiup.yaml
+++ b/.github/workflows/upgrade_dm_via_tiup.yaml
@@ -68,12 +68,6 @@ jobs:
         with:
           args: "upgrade job failed, see https://github.com/pingcap/tiflow/actions/runs/{{ GITHUB_RUN_ID }}"
 
-      # Debug via SSH if previous steps failed
-      - name: Set up tmate session
-        if: ${{ failure() }}
-        uses: mxschmitt/action-tmate@v3
-        timeout-minutes: 30
-
   from_v2:
     name: From V2
     runs-on: ubuntu-18.04
@@ -186,12 +180,6 @@ jobs:
         with:
           args: "upgrade-via-tiup job failed, see https://github.com/pingcap/tiflow/actions/runs/{{ GITHUB_RUN_ID }}"
 
-      # Debug via SSH if previous steps failed
-      - name: Set up tmate session
-        if: ${{ failure() }}
-        uses: mxschmitt/action-tmate@v3
-        timeout-minutes: 30
-
   upgrade_tidb:
     name: Upgrade TiDB
     runs-on: ubuntu-18.04
@@ -244,9 +232,3 @@ jobs:
         uses: Ilshidur/action-slack@2.1.0
         with:
           args: "upgrade job failed, see https://github.com/pingcap/tiflow/actions/runs/{{ GITHUB_RUN_ID }}"
-
-      # Debug via SSH if previous steps failed
-      - name: Set up tmate session
-        if: ${{ failure() }}
-        uses: mxschmitt/action-tmate@v3
-        timeout-minutes: 60
diff --git a/dm/tests/upstream_switch/conf/diff_config.toml b/dm/tests/upstream_switch/conf/diff_config.toml
index 98cb4b4b50d..0529f1d806e 100644
--- a/dm/tests/upstream_switch/conf/diff_config.toml
+++ b/dm/tests/upstream_switch/conf/diff_config.toml
@@ -15,7 +15,7 @@ check-struct-only = false
 
 [routes.rule1]
 schema-pattern = "db_pessimistic"
-table-pattern = "tb?*"
+table-pattern = "tb*"
 target-schema = "db_pessimistic"
 target-table = "tb"