diff --git a/rules-tests/CodeQuality/Rector/Class_/PreferPHPUnitSelfCallRector/Fixture/skip_different_object.php.inc b/rules-tests/CodeQuality/Rector/Class_/PreferPHPUnitSelfCallRector/Fixture/skip_different_object.php.inc
new file mode 100644
index 00000000..bb30f748
--- /dev/null
+++ b/rules-tests/CodeQuality/Rector/Class_/PreferPHPUnitSelfCallRector/Fixture/skip_different_object.php.inc
@@ -0,0 +1,16 @@
+<?php
+
+namespace Rector\PHPUnit\Tests\CodeQuality\Rector\Class_\PreferPHPUnitSelfCallRector\Fixture;
+
+use PHPUnit\Framework\TestCase;
+
+final class SkipDifferentObject extends TestCase
+{
+    public function testMe()
+    {
+        $this->transport('webhook')
+            ->dispatched()
+            ->assertCount(1)
+            ->assertContains(SendWebhookMessage::class);
+    }
+}
diff --git a/rules-tests/CodeQuality/Rector/Class_/PreferPHPUnitThisCallRector/Fixture/skip_different_object.php.inc b/rules-tests/CodeQuality/Rector/Class_/PreferPHPUnitThisCallRector/Fixture/skip_different_object.php.inc
new file mode 100644
index 00000000..b339b13b
--- /dev/null
+++ b/rules-tests/CodeQuality/Rector/Class_/PreferPHPUnitThisCallRector/Fixture/skip_different_object.php.inc
@@ -0,0 +1,13 @@
+<?php
+
+namespace Rector\PHPUnit\Tests\CodeQuality\Rector\Class_\PreferPHPUnitThisCallRector\Fixture;
+
+use PHPUnit\Framework\TestCase;
+
+final class SkipDifferentObjectType extends TestCase
+{
+    public function testMe()
+    {
+        $someMock = $object->execute()::createMock('stdClass');
+    }
+}
diff --git a/rules/CodeQuality/NodeAnalyser/AssertMethodAnalyzer.php b/rules/CodeQuality/NodeAnalyser/AssertMethodAnalyzer.php
index 7f597374..9d29a191 100644
--- a/rules/CodeQuality/NodeAnalyser/AssertMethodAnalyzer.php
+++ b/rules/CodeQuality/NodeAnalyser/AssertMethodAnalyzer.php
@@ -7,7 +7,9 @@
 use PhpParser\Node\Expr\MethodCall;
 use PhpParser\Node\Expr\StaticCall;
 use PHPStan\Reflection\ClassReflection;
+use PHPStan\Type\ObjectType;
 use Rector\NodeNameResolver\NodeNameResolver;
+use Rector\NodeTypeResolver\NodeTypeResolver;
 use Rector\PHPUnit\CodeQuality\Enum\NonAssertStaticableMethods;
 use Rector\PHPUnit\Enum\PHPUnitClassName;
 use Rector\Reflection\ReflectionResolver;
@@ -17,11 +19,20 @@
     public function __construct(
         private NodeNameResolver $nodeNameResolver,
         private ReflectionResolver $reflectionResolver,
+        private NodeTypeResolver $nodeTypeResolver
     ) {
     }
 
     public function detectTestCaseCall(MethodCall|StaticCall $call): bool
     {
+        $objectCaller = $call instanceof MethodCall
+            ? $call->var
+            : $call->class;
+
+        if (! $this->nodeTypeResolver->isObjectType($objectCaller, new ObjectType('PHPUnit\Framework\TestCase'))) {
+            return false;
+        }
+
         $methodName = $this->nodeNameResolver->getName($call->name);
         if (! str_starts_with((string) $methodName, 'assert') && ! in_array(
             $methodName,