diff --git a/.github/workflows/plugin-linting.yml b/.github/workflows/plugin-linting.yml
index 51b9b82..92c6e3e 100644
--- a/.github/workflows/plugin-linting.yml
+++ b/.github/workflows/plugin-linting.yml
@@ -37,11 +37,10 @@ jobs:
         shell: bash
         run: |
           yarn prettier -v
-          shopt -s extglob
-          if ls assets/**/*.@(scss|js|es6) &> /dev/null; then
+          if [ 0 -lt $(find assets -type f \( -name "*.scss" -or -name "*.js" -or -name "*.es6" \) 2> /dev/null | wc -l) ]; then
             yarn prettier --list-different "assets/**/*.{scss,js,es6}"
           fi
-          if ls test/**/*.@(js|es6) &> /dev/null; then
+          if [ 0 -lt $(find test -type f \( -name "*.js" -or -name "*.es6" \) 2> /dev/null | wc -l) ]; then
             yarn prettier --list-different "test/**/*.{js,es6}"
           fi
 
diff --git a/.github/workflows/plugin-tests.yml b/.github/workflows/plugin-tests.yml
index b28d0e2..a5eff7c 100644
--- a/.github/workflows/plugin-tests.yml
+++ b/.github/workflows/plugin-tests.yml
@@ -29,7 +29,6 @@ jobs:
         build_type: ["backend", "frontend"]
         ruby: ["2.7"]
         postgres: ["13"]
-        redis: ["4.x"]
 
     services:
       postgres:
@@ -63,10 +62,9 @@ jobs:
           git config --global user.email "ci@ci.invalid"
           git config --global user.name "Discourse CI"
 
-      - name: Setup redis
-        uses: shogo82148/actions-setup-redis@v1
-        with:
-          redis-version: ${{ matrix.redis }}
+      - name: Start redis
+        run: |
+          redis-server /etc/redis/redis.conf &
 
       - name: Bundler cache
         uses: actions/cache@v2
@@ -113,8 +111,7 @@ jobs:
         id: check_spec
         shell: bash
         run: |
-          shopt -s extglob
-          if ls plugins/${{ github.event.repository.name }}/spec/**/*.@(rb) &> /dev/null; then
+          if [ 0 -lt $(find plugins/${{ github.event.repository.name }}/spec -type f -name "*.rb" 2> /dev/null | wc -l) ]; then
             echo "::set-output name=files_exist::true"
           fi
 
@@ -126,8 +123,7 @@ jobs:
         id: check_qunit
         shell: bash
         run: |
-          shopt -s extglob
-          if ls plugins/${{ github.event.repository.name }}/test/javascripts/**/*.@(js|es6) &> /dev/null; then
+          if [ 0 -lt $(find plugins/${{ github.event.repository.name }}/test/javascripts -type f \( -name "*.js" -or -name "*.es6" \) 2> /dev/null | wc -l) ]; then
             echo "::set-output name=files_exist::true"
           fi