diff --git a/.github/actions/action-tmate b/.github/actions/action-tmate
deleted file mode 160000
index 079a16b22b8b..000000000000
--- a/.github/actions/action-tmate
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 079a16b22b8bcc5dd231a42d9a5e8e48db564688
diff --git a/.github/workflows/chaos.yml b/.github/workflows/chaos.yml
index e26a4e90319d..87ecf4ee111b 100644
--- a/.github/workflows/chaos.yml
+++ b/.github/workflows/chaos.yml
@@ -84,9 +84,3 @@ jobs:
       - name: Run test
         working-directory: ./t/chaos
         run: ginkgo -r --v --progress --trace
-
-      # Debug via SSH if previous steps failed
-      - name: Set up tmate session
-        if: ${{ failure() }}
-        uses: ./.github/actions/action-tmate
-        timeout-minutes: 15
diff --git a/.gitmodules b/.gitmodules
index 12854c44f59a..6ad3766a07a5 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,9 +1,6 @@
 [submodule "t/toolkit"]
 	path = t/toolkit
 	url = https://github.com/api7/test-toolkit.git
-[submodule ".github/actions/action-tmate"]
-	path = .github/actions/action-tmate
-	url = https://github.com/mxschmitt/action-tmate
 [submodule "t/grpc_server_example"]
 	path = t/grpc_server_example
 	url = https://github.com/api7/grpc_server_example