diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
new file mode 100644
index 00000000..37d3ae3d
--- /dev/null
+++ b/.github/workflows/documentation.yml
@@ -0,0 +1,47 @@
+name: "Documentation"
+
+on:
+  pull_request:
+    branches:
+      - "*.x"
+    paths:
+      - .github/workflows/documentation.yml
+      - docs/**
+  push:
+    branches:
+      - "*.x"
+    paths:
+      - .github/workflows/documentation.yml
+      - docs/**
+
+jobs:
+  validate-with-guides:
+    name: "Validate documentation with phpDocumentor/guides"
+    runs-on: "ubuntu-22.04"
+
+    steps:
+      - name: "Checkout code"
+        uses: "actions/checkout@v3"
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "none"
+          php-version: "8.2"
+
+      - name: "Remove existing composer file"
+        run: "rm composer.json"
+
+      - name: "Require phpdocumentor/guides-cli"
+        run: "composer require --dev phpdocumentor/guides-cli dev-main@dev --no-update"
+
+      - name: "Configure minimum stability"
+        run: "composer config minimum-stability dev"
+
+      - name: "Install dependencies with Composer"
+        uses: "ramsey/composer-install@v2"
+        with:
+          dependency-versions: "highest"
+
+      - name: "Run guides-cli"
+        run: "vendor/bin/guides -vvv --no-progress --fail-on-log docs/en /tmp/test"
diff --git a/composer.json b/composer.json
index 99ec24b0..36ad7f1a 100644
--- a/composer.json
+++ b/composer.json
@@ -42,7 +42,7 @@
         "phpstan/phpstan": "^1.8",
         "phpstan/phpstan-phpunit": "^1.0",
         "phpunit/phpunit": "^9.5",
-        "vimeo/psalm": "^4.22"
+        "vimeo/psalm": "^5.11"
     },
     "autoload": {
         "psr-4": {
diff --git a/psalm.xml.dist b/psalm.xml.dist
index 27ddd2f6..bf24a173 100644
--- a/psalm.xml.dist
+++ b/psalm.xml.dist
@@ -4,6 +4,8 @@
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns="https://getpsalm.org/schema/config"
     xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+    findUnusedBaselineEntry="true"
+    findUnusedCode="false"
 >
     <projectFiles>
         <directory name="src" />
@@ -18,6 +20,18 @@
         <MixedArgumentTypeCoercion errorLevel="info" />
         <MixedAssignment errorLevel="info" />
 
+        <MixedInferredReturnType>
+            <errorLevel type="suppress">
+                <file name="src/AbstractLazyCollection.php"/>
+            </errorLevel>
+        </MixedInferredReturnType>
+
+        <MixedReturnStatement>
+            <errorLevel type="suppress">
+                <file name="src/AbstractLazyCollection.php"/>
+            </errorLevel>
+        </MixedReturnStatement>
+
         <PossiblyNullArgument>
             <errorLevel type="suppress">
                 <!-- Remove when https://github.com/vimeo/psalm/pull/7759 is released -->
diff --git a/src/AbstractLazyCollection.php b/src/AbstractLazyCollection.php
index 5fdc4adc..4ff3a466 100644
--- a/src/AbstractLazyCollection.php
+++ b/src/AbstractLazyCollection.php
@@ -49,8 +49,6 @@ public function clear(): void
 
     /**
      * {@inheritDoc}
-     *
-     * @template TMaybeContained
      */
     public function contains(mixed $element): bool
     {
diff --git a/src/ArrayCollection.php b/src/ArrayCollection.php
index e9fd2b47..836215d5 100644
--- a/src/ArrayCollection.php
+++ b/src/ArrayCollection.php
@@ -197,8 +197,6 @@ public function containsKey(string|int $key): bool
 
     /**
      * {@inheritDoc}
-     *
-     * @template TMaybeContained
      */
     public function contains(mixed $element): bool
     {