diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 443bce0..85bcc7b 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -7,7 +7,10 @@ jobs:
 
     strategy:
       matrix:
-        php: ["7.4", "8.0"]
+        php: ["7.4", "8.0", "8.1"]
+        composer_args:
+          - '--prefer-lowest'
+          - ''
 
     runs-on: ubuntu-latest
     container:
@@ -22,6 +25,8 @@ jobs:
           mkdir -p /root/.ssh
           ssh-keyscan -t rsa github.com >> /root/.ssh/known_hosts
           echo "COMPOSER_CACHE=$(composer config cache-dir)" >> $GITHUB_ENV
+          git fetch origin $GITHUB_BASE_REF $GITHUB_HEAD_REF
+          echo "GIT_ADDED_FILES="$(git diff --name-only --diff-filter=A origin/$GITHUB_BASE_REF origin/$GITHUB_HEAD_REF | grep 'src\/')"" >> $GITHUB_ENV
 
       - name: Composer Cache
         uses: actions/cache@v2
@@ -35,28 +40,43 @@ jobs:
         run: |
           composer update --no-progress --no-interaction ${{ matrix.composer_args }} > /dev/null
 
-      - name: PHPCS
-        if: matrix.php != '8.0'
-        run: |
-          composer cs-check
-
       - name: Static analysis
         run: |
           composer check-deps
+          composer cs-check
           composer phpstan -- --no-progress
           composer psalm
 
+      - name: Infection coverage of added files
+        if: env.GIT_ADDED_FILES != '' && !contains(github.event.pull_request.labels.*.name, 'skip-infection-diff')
+        run: |
+          vendor/bin/infection \
+            --git-diff-base=origin/$GITHUB_BASE_REF \
+            --git-diff-filter=A \
+            --logger-github \
+            --min-msi=100 \
+            --min-covered-msi=100
+
       - name: Tests
         run: |
           vendor/bin/phpunit --coverage-clover=coverage.xml --stop-on-failure
           composer run --timeout=0 infection
 
+      - name: Save Infection result
+        uses: actions/upload-artifact@v2
+        if: always()
+        with:
+          name: infection-log-${{ matrix.php }}.txt
+          path: infection-log.txt
+
       - name: Monitor coverage
         if: github.event_name == 'pull_request'
         uses: slavcodev/coverage-monitor-action@v1
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           clover_file: "coverage.xml"
-          comment_context: PHP ${{ matrix.php }}
+          comment: false
+          comment_context: Coverage PHP ${{ matrix.php }}
+          status_context: Coverage PHP ${{ matrix.php }}
           threshold_alert: 100
           threshold_warning: 100
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7d4c88d..7da7fbd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,28 @@ All notable changes to this project will be documented in this file, in reverse
 
 File automatically generated with [phly/keep-a-changelog](https://github.com/phly/keep-a-changelog)
 
+## 1.1.2 - 2022-02-25
+
+### Added
+
+- [#6](https://github.com/trinet-at/mezzio-test/pull/6) allows using v2 of thecodingmachine/safe
+
+### Changed
+
+- Nothing.
+
+### Deprecated
+
+- Nothing.
+
+### Removed
+
+- Nothing.
+
+### Fixed
+
+- Nothing.
+
 ## 1.1.1 - 2021-10-15
 
 ### Added
diff --git a/composer.json b/composer.json
index d2c8b59..e3f3136 100644
--- a/composer.json
+++ b/composer.json
@@ -1,8 +1,8 @@
 {
     "name": "trinet/mezzio-test",
-    "type": "library",
     "description": "Testing helpers for mezzio projects",
     "license": "MIT",
+    "type": "library",
     "require": {
         "php": "^7.4 || ^8.0",
         "fig/http-message-util": "^1.1",
@@ -13,26 +13,25 @@
         "mezzio/mezzio-router": "^3.1",
         "psr/container": "^1.0 || ^2.0",
         "psr/http-message": "^1.0",
-        "thecodingmachine/safe": "^1.0"
+        "thecodingmachine/safe": "^1.0 || ^2.0"
     },
     "require-dev": {
+        "bnf/phpstan-psr-container": "^1.0",
         "eventjet/coding-standard": "^3.1",
-        "infection/infection": "^0.23.0",
+        "infection/infection": "^0.26.0",
         "laminas/laminas-servicemanager": "^3.4",
-        "maglnet/composer-require-checker": "^3.3",
+        "maglnet/composer-require-checker": "^3.3 || ^4.0",
         "mezzio/mezzio-fastroute": "^3.0",
         "phpstan/extension-installer": "^1.0",
-        "phpstan/phpstan": "^0.12.5",
-        "phpstan/phpstan-phpunit": "^0.12.6",
-        "phpstan/phpstan-strict-rules": "^0.12.1",
-        "phpunit/phpunit": "^9.4",
+        "phpstan/phpstan": "^1.4",
+        "phpstan/phpstan-phpunit": "^1.0",
+        "phpstan/phpstan-strict-rules": "^1.0",
+        "phpunit/phpunit": "^9.5",
         "psalm/plugin-phpunit": "^0.16.1",
         "thecodingmachine/phpstan-safe-rule": "^1.0",
         "vimeo/psalm": "^4.0"
     },
-    "config": {
-        "sort-packages": true
-    },
+    "minimum-stability": "stable",
     "autoload": {
         "psr-4": {
             "Trinet\\MezzioTest\\": "src"
@@ -44,7 +43,15 @@
             "Trinet\\Test\\Unit\\MezzioTest\\": "tests/unit"
         }
     },
-    "minimum-stability": "stable",
+    "config": {
+        "allow-plugins": {
+            "composer/package-versions-deprecated": true,
+            "phpstan/extension-installer": true,
+            "dealerdirect/phpcodesniffer-composer-installer": true,
+            "infection/extension-installer": true
+        },
+        "sort-packages": true
+    },
     "scripts": {
         "check": [
             "@check-deps",
diff --git a/phpcs.xml b/phpcs.xml
index 3b483c5..b9884b1 100644
--- a/phpcs.xml
+++ b/phpcs.xml
@@ -3,6 +3,7 @@
     <rule ref="EventjetStrict"/>
 
     <arg name="parallel" value="80"/>
+    <config name="php_version" value="70400"/>
 
     <file>src</file>
     <file>tests</file>
diff --git a/src/TestConfigProvider.php b/src/TestConfigProvider.php
index 7df10bd..c7d0b0e 100644
--- a/src/TestConfigProvider.php
+++ b/src/TestConfigProvider.php
@@ -11,7 +11,7 @@
 final class TestConfigProvider
 {
     /**
-     * @return list<mixed>
+     * @return list<PhpFileProvider>
      */
     public static function load(?string $configDir = null): array
     {
diff --git a/tests/functional/MezzioTestEnvironmentTest.php b/tests/functional/MezzioTestEnvironmentTest.php
index 26c5ec1..60bf960 100644
--- a/tests/functional/MezzioTestEnvironmentTest.php
+++ b/tests/functional/MezzioTestEnvironmentTest.php
@@ -66,6 +66,7 @@ public function testDispatchGeneratedRoute(): void
 
     public function testRuntimeIsSetToAppTesting(): void
     {
+        /** @var array<string, mixed> $config */
         $config = $this->mezzio->container()->get('config');
 
         self::assertTrue($config['testing']);
diff --git a/tests/functional/TestConfigProviderTest.php b/tests/functional/TestConfigProviderTest.php
index e2140ea..ff4fd7a 100644
--- a/tests/functional/TestConfigProviderTest.php
+++ b/tests/functional/TestConfigProviderTest.php
@@ -36,7 +36,11 @@ public function testCustomConfigPath(): void
         $providerA = $result[0];
         $providerB = $result[1];
         self::assertCount(2, $result);
-        self::assertStringContainsString($path, ReflectionUtil::getReflectionProperty($providerA, 'pattern'));
-        self::assertStringContainsString($path, ReflectionUtil::getReflectionProperty($providerB, 'pattern'));
+        $propertyA = ReflectionUtil::getReflectionProperty($providerA, 'pattern');
+        self::assertIsString($propertyA);
+        self::assertStringContainsString($path, $propertyA);
+        $propertyB = ReflectionUtil::getReflectionProperty($providerB, 'pattern');
+        self::assertIsString($propertyB);
+        self::assertStringContainsString($path, $propertyB);
     }
 }