diff --git a/rules-tests/CodeQuality/Rector/MethodCall/ScalarArgumentToExpectedParamTypeRector/Fixture/local_call.php.inc b/rules-tests/CodeQuality/Rector/MethodCall/ScalarArgumentToExpectedParamTypeRector/Fixture/local_call.php.inc
new file mode 100644
index 00000000..8839ed5e
--- /dev/null
+++ b/rules-tests/CodeQuality/Rector/MethodCall/ScalarArgumentToExpectedParamTypeRector/Fixture/local_call.php.inc
@@ -0,0 +1,43 @@
+<?php
+
+namespace Rector\PHPUnit\Tests\CodeQuality\Rector\MethodCall\ScalarArgumentToExpectedParamTypeRector\Fixture;
+
+use Behat\Behat\Context\Context;
+use Rector\PHPUnit\Tests\CodeQuality\Rector\MethodCall\ScalarArgumentToExpectedParamTypeRector\Source\SomeClassWithSetter;
+
+final class LocalCall implements Context
+{
+    public function test()
+    {
+        $result = $this->sumUp('1', '2');
+    }
+
+    private function sumUp(int $a, int $b): int
+    {
+        return $a + $b;
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\PHPUnit\Tests\CodeQuality\Rector\MethodCall\ScalarArgumentToExpectedParamTypeRector\Fixture;
+
+use Behat\Behat\Context\Context;
+use Rector\PHPUnit\Tests\CodeQuality\Rector\MethodCall\ScalarArgumentToExpectedParamTypeRector\Source\SomeClassWithSetter;
+
+final class LocalCall implements Context
+{
+    public function test()
+    {
+        $result = $this->sumUp(1, 2);
+    }
+
+    private function sumUp(int $a, int $b): int
+    {
+        return $a + $b;
+    }
+}
+
+?>
diff --git a/rules/CodeQuality/Reflection/MethodParametersAndReturnTypesResolver.php b/rules/CodeQuality/Reflection/MethodParametersAndReturnTypesResolver.php
index 00afac20..e4a7b2f6 100644
--- a/rules/CodeQuality/Reflection/MethodParametersAndReturnTypesResolver.php
+++ b/rules/CodeQuality/Reflection/MethodParametersAndReturnTypesResolver.php
@@ -14,6 +14,7 @@
 use PHPStan\Type\MixedType;
 use PHPStan\Type\ObjectType;
 use PHPStan\Type\StaticType;
+use PHPStan\Type\ThisType;
 use PHPStan\Type\Type;
 use Rector\Enum\ClassName;
 use Rector\NodeTypeResolver\NodeTypeResolver;
@@ -72,6 +73,10 @@ public function resolveCallParameterTypes(MethodCall|StaticCall $call): ?array
         $methodName = $call->name->toString();
 
         $callerType = $this->nodeTypeResolver->getType($call instanceof MethodCall ? $call->var : $call->class);
+        if ($callerType instanceof ThisType) {
+            $callerType = $callerType->getStaticObjectType();
+        }
+
         if (! $callerType instanceof ObjectType) {
             return null;
         }