diff --git a/src/Event/Value/TestSuite/TestSuiteBuilder.php b/src/Event/Value/TestSuite/TestSuiteBuilder.php
index c8988693076..e9688a8f56f 100644
--- a/src/Event/Value/TestSuite/TestSuiteBuilder.php
+++ b/src/Event/Value/TestSuite/TestSuiteBuilder.php
@@ -107,7 +107,7 @@ public static function from(FrameworkTestSuite $testSuite): TestSuite
      */
     private static function process(FrameworkTestSuite $testSuite, &$tests): void
     {
-        foreach ($testSuite->tests() as $test) {
+        foreach ($testSuite->getIterator() as $test) {
             if ($test instanceof FrameworkTestSuite) {
                 self::process($test, $tests);
 
diff --git a/tests/unit/Event/Value/TestSuite/TestSuiteBuilderTest.php b/tests/unit/Event/Value/TestSuite/TestSuiteBuilderTest.php
index de36fdf7d90..b3885c1fbbe 100644
--- a/tests/unit/Event/Value/TestSuite/TestSuiteBuilderTest.php
+++ b/tests/unit/Event/Value/TestSuite/TestSuiteBuilderTest.php
@@ -13,6 +13,7 @@
 use PHPUnit\Framework\Attributes\Small;
 use PHPUnit\Framework\TestCase;
 use PHPUnit\Framework\TestSuite as FrameworkTestSuite;
+use PHPUnit\Runner\Filter\Factory;
 use PHPUnit\TextUI\CliArguments\Builder as CliArgumentsBuilder;
 use PHPUnit\TextUI\Configuration\Merger as ConfigurationMerger;
 use PHPUnit\TextUI\XmlConfiguration\Loader as XmlConfigurationLoader;
@@ -29,9 +30,23 @@ public function test_Builds_TestSuite_value_object_for_test_suite_loaded_from_XM
         $this->assertTrue($testSuite->isWithName());
         $this->assertStringEndsWith('phpunit.xml', $testSuite->name());
         $this->assertSame(3, $testSuite->count());
+        $this->assertSame(3, $testSuite->tests()->count());
         $this->assertCount(3, $testSuite->tests());
     }
 
+    public function testBuildCountWithFilter()
+    {
+        $testSuite = $this->testSuiteFromXmlConfiguration();
+        $filterFactory = new Factory();
+        $filterFactory->addNameFilter('one');
+        $testSuite->injectFilter($filterFactory);
+        $testSuite = TestSuiteBuilder::from($testSuite);
+
+        $this->assertSame(1, $testSuite->count());
+        $this->assertSame(1, $testSuite->tests()->count());
+        $this->assertCount(1, $testSuite->tests());
+    }
+
     public function test_Builds_TestSuite_value_object_for_test_case_class(): void
     {
         $testSuite = TestSuiteBuilder::from($this->testSuiteFromXmlConfiguration()->tests()[0]->tests()[0]);