diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 15715d4..062feb3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -172,3 +172,41 @@ jobs:
         with:
           name: 'PHP ${{ matrix.php }} with ${{ fromJson(matrix.db).vendor }}'
           path: 'clover.xml'
+
+  unit-lowest:
+    name: 'Run unit tests with lowest-matching dependencies versions'
+    if: "!contains(github.event.commits[0].message, '[skip ci]') && !contains(github.event.commits[0].message, '[ci skip]')"
+    runs-on: 'ubuntu-20.04'
+
+    env:
+      db_dsn: 'sqlite://tmp/test.sql'
+
+    steps:
+      - name: 'Checkout current revision'
+        uses: 'actions/checkout@v2'
+
+      - name: 'Setup PHP'
+        uses: 'shivammathur/setup-php@v2'
+        with:
+          php-version: '7.4'
+          tools: 'composer'
+          extensions: 'mbstring, intl, pdo_sqlite'
+
+      - name: 'Discover Composer cache directory'
+        id: 'cachedir'
+        run: 'echo "::set-output name=path::$(composer global config cache-dir)"'
+
+      - name: 'Share Composer cache across runs'
+        uses: 'actions/cache@v2'
+        with:
+          path: '${{ steps.cachedir.outputs.path }}'
+          key: "composer-lowest-${{ hashFiles('**/composer.json') }}"
+          restore-keys: |
+            composer-lowest-
+            composer-
+
+      - name: 'Update dependencies with Composer'
+        run: 'composer update --prefer-lowest --prefer-dist --no-interaction'
+
+      - name: 'Run PHPUnit'
+        run: 'vendor/bin/phpunit'
diff --git a/README.md b/README.md
index e7591ba..19e2f48 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,8 @@
 # Placeholders plugin for BEdita
 
+[![GitHub Actions tests](https://github.com/bedita/placeholders/actions/workflows/test.yml/badge.svg?event=push&branch=main)](https://github.com/bedita/placeholders/actions/workflows/test.yml?query=event%3Apush+branch%3Amain)
+[![codecov](https://codecov.io/gh/bedita/placeholders/branch/main/graph/badge.svg)](https://codecov.io/gh/bedita/placeholders)
+
 ## Installation
 
 You can install this plugin into your CakePHP application using [composer](https://getcomposer.org).
diff --git a/composer.json b/composer.json
index 8b0be3d..731aa26 100644
--- a/composer.json
+++ b/composer.json
@@ -6,13 +6,13 @@
     "require": {
         "php": ">= 7.4",
         "cakephp/cakephp": "^3.8",
-        "bedita/core": "dev-4-cactus as 4.4.0-dev",
-        "bedita/api": "dev-4-cactus as 4.4.0-dev"
+        "bedita/core": "dev-4-cactus as 4.7.0-dev",
+        "bedita/api": "dev-4-cactus as 4.7.0-dev"
     },
     "require-dev": {
         "cakephp/cakephp-codesniffer": "^3.0",
-        "cakephp/plugin-installer": "^1.0",
-        "phpunit/phpunit": "^5.7.14|^6.0"
+        "cakephp/plugin-installer": "^1.3",
+        "phpunit/phpunit": "^6.0"
     },
     "autoload": {
         "psr-4": {
diff --git a/tests/TestCase/Controller/Component/PlaceholdersComponentTest.php b/tests/TestCase/Controller/Component/PlaceholdersComponentTest.php
index 23370cc..4b65af5 100644
--- a/tests/TestCase/Controller/Component/PlaceholdersComponentTest.php
+++ b/tests/TestCase/Controller/Component/PlaceholdersComponentTest.php
@@ -123,7 +123,9 @@ public function beforeFilterProvider(): array
     public function testBeforeFilter(?Exception $expected, ServerRequest $request): void
     {
         if ($expected !== null) {
-            $this->expectExceptionObject($expected);
+            $this->expectException(get_class($expected));
+            $this->expectExceptionCode($expected->getCode());
+            $this->expectExceptionMessage($expected->getMessage());
         }
 
         $this->controller->setRequest($request);