diff --git a/conf/bleedingEdge.neon b/conf/bleedingEdge.neon
index 9481e3f159..43856382a7 100644
--- a/conf/bleedingEdge.neon
+++ b/conf/bleedingEdge.neon
@@ -1,7 +1,7 @@
 parameters:
 	featureToggles:
 		bleedingEdge: true
-		skipCheckGenericClasses: []
+		skipCheckGenericClasses!: []
 		explicitMixedInUnknownGenericNew: true
 		explicitMixedForGlobalVariables: true
 		explicitMixedViaIsArray: true
diff --git a/tests/PHPStan/Analyser/AnalyserIntegrationTest.php b/tests/PHPStan/Analyser/AnalyserIntegrationTest.php
index bb0c8600c0..029f43620e 100644
--- a/tests/PHPStan/Analyser/AnalyserIntegrationTest.php
+++ b/tests/PHPStan/Analyser/AnalyserIntegrationTest.php
@@ -1104,6 +1104,13 @@ public function testBug8004(): void
 		$this->assertNoErrors($errors);
 	}
 
+	public function testSkipCheckNoGenericClasses(): void
+	{
+		$errors = $this->runAnalyse(__DIR__ . '/data/skip-check-no-generic-classes.php');
+		$this->assertCount(1, $errors);
+		$this->assertSame('Method SkipCheckNoGenericClasses\Foo::doFoo() has parameter $i with generic class LimitIterator but does not specify its types: TKey, TValue, TIterator', $errors[0]->getMessage());
+	}
+
 	/**
 	 * @param string[]|null $allAnalysedFiles
 	 * @return Error[]
diff --git a/tests/PHPStan/Analyser/data/skip-check-no-generic-classes.php b/tests/PHPStan/Analyser/data/skip-check-no-generic-classes.php
new file mode 100644
index 0000000000..7062419000
--- /dev/null
+++ b/tests/PHPStan/Analyser/data/skip-check-no-generic-classes.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace SkipCheckNoGenericClasses;
+
+use LimitIterator;
+
+class Foo
+{
+
+	public function doFoo(LimitIterator $i): void
+	{
+
+	}
+
+}