diff --git a/tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php b/tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php
index fbfee4b77ee..c7aacb4000c 100644
--- a/tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php
+++ b/tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php
@@ -1406,4 +1406,9 @@ public function testJsonValidate(): void
 		]);
 	}
 
+	public function testBug4608(): void
+	{
+		$this->analyse([__DIR__ . '/data/bug-4608.php'], []);
+	}
+
 }
diff --git a/tests/PHPStan/Rules/Functions/data/bug-4608.php b/tests/PHPStan/Rules/Functions/data/bug-4608.php
new file mode 100644
index 00000000000..7a64e071b87
--- /dev/null
+++ b/tests/PHPStan/Rules/Functions/data/bug-4608.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace Bug4608;
+
+function doFoo() {
+	$c = new class {
+		public function abc(): void {}
+	};
+
+	$s = rand(0, 1) ? 'abc' : 'not_abc';
+
+	$c->{$s}();
+	call_user_func([$c, $s]);
+	[$c, $s]();
+}