diff --git a/phpstan.neon b/phpstan.neon
index bf132e8..f3d023b 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,5 +1,6 @@
 parameters:
   level: 10
   reportUnmatchedIgnoredErrors: false
+  treatPhpDocTypesAsCertain: false
   paths:
     - src
diff --git a/src/Linter/Configuration/YamlConfigurationLoader.php b/src/Linter/Configuration/YamlConfigurationLoader.php
index e1f3a52..71b43cf 100644
--- a/src/Linter/Configuration/YamlConfigurationLoader.php
+++ b/src/Linter/Configuration/YamlConfigurationLoader.php
@@ -47,8 +47,6 @@ public function __construct(FileLocatorInterface $locator, YamlParser $yamlParse
      * @param string|null $type The resource type
      *
      * @return array<string, mixed>
-     *
-     * @psalm-suppress MethodSignatureMismatch
      */
     public function load(mixed $resource, ?string $type = null): array
     {
@@ -73,8 +71,6 @@ public function load(mixed $resource, ?string $type = null): array
      * @param string|null $type The resource type
      *
      * @return bool    true if this class supports the given resource, false otherwise
-     *
-     * @psalm-suppress MethodSignatureMismatch
      */
     public function supports(mixed $resource, ?string $type = null): bool
     {
diff --git a/src/Linter/Linter.php b/src/Linter/Linter.php
index 2255654..427ac4c 100644
--- a/src/Linter/Linter.php
+++ b/src/Linter/Linter.php
@@ -58,7 +58,7 @@ public function lintFile(
     }
 
     /**
-     * @psalm-param TokenInterface[] $tokens
+     * @param TokenInterface[] $tokens
      */
     private function lintTokenStream(
         array $tokens,
@@ -82,7 +82,7 @@ private function lintTokenStream(
     }
 
     /**
-     * @psalm-param Statement[] $statements
+     * @param Statement[] $statements
      */
     private function lintSyntaxTree(
         array $statements,
diff --git a/src/Linter/Sniff/DeadCodeSniff.php b/src/Linter/Sniff/DeadCodeSniff.php
index e41f3ee..d8d74a4 100644
--- a/src/Linter/Sniff/DeadCodeSniff.php
+++ b/src/Linter/Sniff/DeadCodeSniff.php
@@ -24,10 +24,6 @@ public function __construct(array $parameters)
 
     /**
      * @param TokenInterface[] $tokens
-     * @param File $file
-     * @param LinterConfiguration $configuration
-     *
-     * @return void
      */
     public function sniff(array $tokens, File $file, LinterConfiguration $configuration): void
     {
diff --git a/src/Linter/Sniff/IndentationSniff.php b/src/Linter/Sniff/IndentationSniff.php
index 0e1f018..e6dc6b8 100644
--- a/src/Linter/Sniff/IndentationSniff.php
+++ b/src/Linter/Sniff/IndentationSniff.php
@@ -11,6 +11,13 @@
 use Helmich\TypoScriptParser\Tokenizer\LineGrouper;
 use Helmich\TypoScriptParser\Tokenizer\TokenInterface;
 
+/**
+ * @phpstan-type IndentationSniffParams array{
+ *      useSpaces: ?bool,
+ *      indentPerLevel: ?int,
+ *      indentConditions: ?bool,
+ *  }
+ */
 class IndentationSniff implements TokenStreamSniffInterface
 {
     use TokenInspections;
@@ -30,10 +37,8 @@ class IndentationSniff implements TokenStreamSniffInterface
     private bool $insideCondition = false;
 
     /**
-     * @param array $parameters
      *
-     * @psalm-param array{useSpaces: ?bool, indentPerLevel: ?int, indentConditions: ?bool} $parameters
-     * @psalm-suppress MoreSpecificImplementedParamType
+     * @param IndentationSniffParams $parameters
      */
     public function __construct(array $parameters)
     {
@@ -50,10 +55,6 @@ public function __construct(array $parameters)
 
     /**
      * @param TokenInterface[] $tokens
-     * @param File $file
-     * @param LinterConfiguration $configuration
-     *
-     * @return void
      */
     public function sniff(array $tokens, File $file, LinterConfiguration $configuration): void
     {
@@ -103,8 +104,6 @@ public function sniff(array $tokens, File $file, LinterConfiguration $configurat
      * Checks if a stream of tokens is an empty line.
      *
      * @param TokenInterface[] $tokensInLine
-     *
-     * @return bool
      */
     private function isEmptyLine(array $tokensInLine): bool
     {
diff --git a/src/Linter/Sniff/NestingConsistencySniff.php b/src/Linter/Sniff/NestingConsistencySniff.php
index 987f2f2..b1c2b54 100644
--- a/src/Linter/Sniff/NestingConsistencySniff.php
+++ b/src/Linter/Sniff/NestingConsistencySniff.php
@@ -5,15 +5,23 @@
 use Helmich\TypoScriptLint\Linter\Sniff\Visitor\NestingConsistencyVisitor;
 use Helmich\TypoScriptLint\Linter\Sniff\Visitor\SniffVisitor;
 
+/**
+ * @phpstan-type NestingConsistencySniffParams array{
+ *     commonPathPrefixThreshold: ?int
+ * }
+ */
 class NestingConsistencySniff extends AbstractSyntaxTreeSniff
 {
     private int $commonPathPrefixThreshold = 1;
 
+    /**
+     * @param NestingConsistencySniffParams $parameters
+     */
     public function __construct(array $parameters)
     {
         parent::__construct($parameters);
 
-        if (array_key_exists('commonPathPrefixThreshold', $parameters) && is_int($parameters['commonPathPrefixThreshold'])) {
+        if (isset($parameters['commonPathPrefixThreshold']) && is_int($parameters['commonPathPrefixThreshold'])) {
             $this->commonPathPrefixThreshold = $parameters['commonPathPrefixThreshold'];
         }
     }
diff --git a/src/Linter/Sniff/OperatorWhitespaceSniff.php b/src/Linter/Sniff/OperatorWhitespaceSniff.php
index e04a0cd..1f247e3 100644
--- a/src/Linter/Sniff/OperatorWhitespaceSniff.php
+++ b/src/Linter/Sniff/OperatorWhitespaceSniff.php
@@ -14,7 +14,7 @@ class OperatorWhitespaceSniff implements TokenStreamSniffInterface
     use TokenInspections;
 
     /**
-     * @param array<mixed, mixed> $parameters
+     * @param array{} $parameters
      * @phpstan-ignore constructor.unusedParameter (defined in interface)
      */
     public function __construct(array $parameters)
diff --git a/src/Linter/Sniff/RepeatingRValueSniff.php b/src/Linter/Sniff/RepeatingRValueSniff.php
index 4c41f77..59e340e 100644
--- a/src/Linter/Sniff/RepeatingRValueSniff.php
+++ b/src/Linter/Sniff/RepeatingRValueSniff.php
@@ -7,6 +7,12 @@
 use Helmich\TypoScriptLint\Linter\Report\Issue;
 use Helmich\TypoScriptParser\Tokenizer\TokenInterface;
 
+/**
+ * @phpstan-type RepeatingRValueSniffParams array{
+ *     allowedRightValues: ?string[],
+ *     valueLengthThreshold: ?int,
+ * }
+ */
 class RepeatingRValueSniff implements TokenStreamSniffInterface
 {
 
@@ -21,8 +27,7 @@ class RepeatingRValueSniff implements TokenStreamSniffInterface
     private int $valueLengthThreshold = 8;
 
     /**
-     * @psalm-param array{allowedRightValues: ?string[], valueLengthThreshold: ?int} $parameters
-     * @psalm-suppress MoreSpecificImplementedParamType
+     * @param RepeatingRValueSniffParams $parameters
      */
     public function __construct(array $parameters)
     {
@@ -37,10 +42,6 @@ public function __construct(array $parameters)
 
     /**
      * @param TokenInterface[] $tokens
-     * @param File $file
-     * @param LinterConfiguration $configuration
-     *
-     * @return void
      */
     public function sniff(array $tokens, File $file, LinterConfiguration $configuration): void
     {
diff --git a/src/Linter/Sniff/Visitor/DuplicateAssignmentVisitor.php b/src/Linter/Sniff/Visitor/DuplicateAssignmentVisitor.php
index 5ee7be6..3af60b8 100644
--- a/src/Linter/Sniff/Visitor/DuplicateAssignmentVisitor.php
+++ b/src/Linter/Sniff/Visitor/DuplicateAssignmentVisitor.php
@@ -39,7 +39,6 @@ public function enterNode(Statement $statement): void
 
         if ($statement instanceof Assignment && false === $this->inCondition) {
             if (isset($this->assignments[$statement->object->absoluteName])) {
-                /** @var Statement $lastAssignment */
                 $lastAssignment = $this->assignments[$statement->object->absoluteName];
                 $this->issues[] = new Issue(
                     $lastAssignment->sourceLine,