diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
index 0242a70c26..063a3eb825 100644
--- a/.github/workflows/integration.yml
+++ b/.github/workflows/integration.yml
@@ -45,9 +45,7 @@ jobs:
       shell: 'script -q -e -c "bash {0}"'
       run: |
         ./scripts/install-dev.sh
-        source env-tester-admin.sh
         ./backend.ai test run-cli admin
-        source env-tester-user.sh
         ./backend.ai test run-cli user
     - name: Upload pants log
       uses: actions/upload-artifact@v4
diff --git a/changes/1956.deprecation.md b/changes/1956.deprecation.md
new file mode 100644
index 0000000000..3f1b45b0aa
--- /dev/null
+++ b/changes/1956.deprecation.md
@@ -0,0 +1 @@
+Remove no longer used `env-tester-{admin,user,user2}.sh` scripts and all references
diff --git a/scripts/install-dev.sh b/scripts/install-dev.sh
index dadf935279..5d9010b07c 100755
--- a/scripts/install-dev.sh
+++ b/scripts/install-dev.sh
@@ -941,11 +941,6 @@ configure_backendai() {
     show_note "The currently embedded webui version: $webui_version"
   fi
 
-  # configure tester
-  echo "export BACKENDAI_TEST_CLIENT_ENV=${PWD}/env-local-admin-api.sh" > ./env-tester-admin.sh
-  echo "export BACKENDAI_TEST_CLIENT_ENV=${PWD}/env-local-user-api.sh" > ./env-tester-user.sh
-  echo "export BACKENDAI_TEST_CLIENT_ENV=${PWD}/env-local-user2-api.sh" > ./env-tester-user2.sh
-
   if [ "${CODESPACES}" = "true" ]; then
     $docker_sudo docker stop $($docker_sudo docker ps -q)
     $docker_sudo docker compose -f "docker-compose.halfstack.current.yml" down
@@ -1085,12 +1080,6 @@ configure_backendai() {
   echo "echo 'Password: $(cat fixtures/manager/example-keypairs.json | jq -r '.users[] | select(.username=="user") | .password')'" >> "${CLIENT_USER_CONF_FOR_SESSION}"
   chmod +x "${CLIENT_USER_CONF_FOR_SESSION}"
 
-  # TODO: Update tester env script
-  ## sed_inplace "s@export BACKENDAI_TEST_CLIENT_VENV=/home/user/.pyenv/versions/venv-dev-client@export BACKENDAI_TEST_CLIENT_VENV=${VENV_PATH}@" ./env-tester-admin.sh
-  ## sed_inplace "s@export BACKENDAI_TEST_CLIENT_ENV=/home/user/bai-dev/client-py/my-backend-session.sh@export BACKENDAI_TEST_CLIENT_ENV=${INSTALL_PATH}/client-py/${CLIENT_ADMIN_CONF_FOR_API}@" ./env-tester-admin.sh
-  ## sed_inplace "s@export BACKENDAI_TEST_CLIENT_VENV=/home/user/.pyenv/versions/venv-dev-client@export BACKENDAI_TEST_CLIENT_VENV=${VENV_PATH}@" ./env-tester-user.sh
-  ## sed_inplace "s@export BACKENDAI_TEST_CLIENT_ENV=/home/user/bai-dev/client-py/my-backend-session.sh@export BACKENDAI_TEST_CLIENT_ENV=${INSTALL_PATH}/client-py/${CLIENT_USER_CONF_FOR_API}@" ./env-tester-user.sh
-
   show_info "Dumping the installed etcd configuration to ./dev.etcd.installed.json as a backup."
   ./backend.ai mgr etcd get --prefix '' > ./dev.etcd.installed.json