diff --git a/MO4/Sniffs/Arrays/ArrayDoubleArrowAlignmentSniff.php b/MO4/Sniffs/Arrays/ArrayDoubleArrowAlignmentSniff.php
index d4ee76b0..839d6e04 100644
--- a/MO4/Sniffs/Arrays/ArrayDoubleArrowAlignmentSniff.php
+++ b/MO4/Sniffs/Arrays/ArrayDoubleArrowAlignmentSniff.php
@@ -96,7 +96,7 @@ public function process(File $phpcsFile, $stackPtr): void
             $previous = $tokens[($i - 1)];
 
             // Skip nested arrays.
-            if (true === \in_array($current['code'], $this->arrayTokens, true)) {
+            if (\in_array($current['code'], $this->arrayTokens, true)) {
                 $i = T_ARRAY === $current['code'] ? ($current['parenthesis_closer'] + 1) : ($current['bracket_closer'] + 1);
 
                 continue;
@@ -145,7 +145,7 @@ public function process(File $phpcsFile, $stackPtr): void
             $j = ($i - 1);
 
             while (($j >= 0) && ($tokens[$j]['line'] === $current['line'])) {
-                if (false === \in_array($tokens[$j]['code'], PHP_CodeSniffer_Tokens::$emptyTokens, true)) {
+                if (!\in_array($tokens[$j]['code'], PHP_CodeSniffer_Tokens::$emptyTokens, true)) {
                     $hasKeyInLine = true;
                 }
 
diff --git a/MO4/Sniffs/Formatting/AlphabeticalUseStatementsSniff.php b/MO4/Sniffs/Formatting/AlphabeticalUseStatementsSniff.php
index 86f00e2f..02b4ff9a 100644
--- a/MO4/Sniffs/Formatting/AlphabeticalUseStatementsSniff.php
+++ b/MO4/Sniffs/Formatting/AlphabeticalUseStatementsSniff.php
@@ -89,7 +89,7 @@ class AlphabeticalUseStatementsSniff extends UseDeclarationSniff
      */
     public function process(File $phpcsFile, $stackPtr): void
     {
-        if (false === \in_array($this->order, self::SUPPORTED_ORDERING_METHODS, true)) {
+        if (!\in_array($this->order, self::SUPPORTED_ORDERING_METHODS, true)) {
             $error = \sprintf(
                 "'%s' is not a valid order function for %s! Pick one of: %s",
                 $this->order,
diff --git a/MO4/Sniffs/Formatting/UnnecessaryNamespaceUsageSniff.php b/MO4/Sniffs/Formatting/UnnecessaryNamespaceUsageSniff.php
index 28860e98..0f3ccb30 100644
--- a/MO4/Sniffs/Formatting/UnnecessaryNamespaceUsageSniff.php
+++ b/MO4/Sniffs/Formatting/UnnecessaryNamespaceUsageSniff.php
@@ -125,7 +125,7 @@ public function process(File $phpcsFile, $stackPtr): void
                 foreach ($tokens[$nsSep]['comment_tags'] as $tag) {
                     $content = $tokens[$tag]['content'];
 
-                    if (false === \array_key_exists($content, $docCommentTags)) {
+                    if (!\array_key_exists($content, $docCommentTags)) {
                         continue;
                     }
 
@@ -179,7 +179,7 @@ public function process(File $phpcsFile, $stackPtr): void
                         // phpcs:enable
 
                         foreach ($typeTokens as $typeToken) {
-                            if (true === \in_array($typeToken, $useStatements, true)) {
+                            if (\in_array($typeToken, $useStatements, true)) {
                                 continue;
                             }
 
@@ -341,7 +341,7 @@ private function checkShorthandPossible(File $phpcsFile, array $useStatements, s
 
         $fullClassName = $this->getFullyQualifiedClassName($className);
 
-        if (true === \array_key_exists($fullClassName, $useStatements)) {
+        if (\array_key_exists($fullClassName, $useStatements)) {
             $replacement = $useStatements[$fullClassName];
 
             $data = [
diff --git a/composer.json b/composer.json
index 475b6a22..7fa6848b 100644
--- a/composer.json
+++ b/composer.json
@@ -32,8 +32,8 @@
     "require-dev": {
         "ergebnis/composer-normalize": ">=2.19 <2.30",
         "phan/phan": "^5.4.2",
-        "phpstan/phpstan": "^1.0",
-        "phpstan/phpstan-strict-rules": "^1.0",
+        "phpstan/phpstan": "^1.12",
+        "phpstan/phpstan-strict-rules": "^1.6",
         "phpunit/phpunit": "^7.5.20 || ^8.5.36 || ^9.6.15",
         "psalm/plugin-phpunit": "^0.18",
         "vimeo/psalm": "^4.30"
diff --git a/phpstan.neon b/phpstan.neon
index 603b51ee..bab22017 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,10 +1,11 @@
 parameters:
     level: max
     bootstrapFiles:
-        - %rootDir%/../../../tests/bootstrap.php
+        - %rootDir%/../../../tests/static_analysis_bootstrap.php
     paths:
        - %rootDir%/../../../MO4
        - %rootDir%/../../../tests
-    checkMissingIterableValueType: false
+    ignoreErrors:
+       - identifier: missingType.iterableValue
 includes:
     - vendor/phpstan/phpstan-strict-rules/rules.neon
diff --git a/psalm.xml b/psalm.xml
index f4813e50..ab2a6a33 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -4,7 +4,7 @@
     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"
-    autoloader="tests/bootstrap.php"
+    autoloader="tests/static_analysis_bootstrap.php"
 >
     <projectFiles>
         <directory name="MO4" />
diff --git a/tests/static_analysis_bootstrap.php b/tests/static_analysis_bootstrap.php
new file mode 100644
index 00000000..5953ddf3
--- /dev/null
+++ b/tests/static_analysis_bootstrap.php
@@ -0,0 +1,18 @@
+<?php
+
+/**
+ * This file is part of the mo4-coding-standard (phpcs standard)
+ *
+ * Bootstrap file for PHP_CodeSniffer MO4 Coding Standard unit tests.
+ *
+ * @author  Xaver Loppenstedt <xaver@loppenstedt.de>
+ *
+ * @license http://spdx.org/licenses/MIT MIT License
+ *
+ * @link    https://github.com/mayflower/mo4-coding-standard
+ */
+
+declare(strict_types=1);
+
+require_once __DIR__.'/../vendor/squizlabs/php_codesniffer/autoload.php';
+require_once __DIR__.'/../vendor/squizlabs/php_codesniffer/src/Util/Tokens.php';