diff --git a/tests/PHPStan/Rules/Properties/MissingReadOnlyPropertyAssignRuleTest.php b/tests/PHPStan/Rules/Properties/MissingReadOnlyPropertyAssignRuleTest.php
index 71e1c09473..72bd938449 100644
--- a/tests/PHPStan/Rules/Properties/MissingReadOnlyPropertyAssignRuleTest.php
+++ b/tests/PHPStan/Rules/Properties/MissingReadOnlyPropertyAssignRuleTest.php
@@ -54,6 +54,14 @@ public function testRule(): void
 				'Access to an uninitialized readonly property MissingReadOnlyPropertyAssign\AssignOp::$bar.',
 				87,
 			],
+			[
+				'Readonly property MissingReadOnlyPropertyAssign\DoubleAssign::$foo is already assigned.',
+				128,
+			],
+			[
+				'Class MissingReadOnlyPropertyAssign\Foo has an maybe uninitialized readonly property $foo.',
+				139,
+			],
 		]);
 	}
 
diff --git a/tests/PHPStan/Rules/Properties/data/missing-readonly-property-assign.php b/tests/PHPStan/Rules/Properties/data/missing-readonly-property-assign.php
index e6671cf9c5..91fac724dc 100644
--- a/tests/PHPStan/Rules/Properties/data/missing-readonly-property-assign.php
+++ b/tests/PHPStan/Rules/Properties/data/missing-readonly-property-assign.php
@@ -101,3 +101,42 @@ public function __construct(int $foo)
 	}
 
 }
+
+class ValidDoubleAssign
+{
+	private readonly int $foo;
+
+	public function __construct(int $foo)
+	{
+		if (rand(0, 1)) {
+			$this->foo = $foo;
+		} else {
+			$this->foo = 0;
+		}
+	}
+}
+
+class DoubleAssign
+{
+	private readonly int $foo;
+
+	public function __construct(int $foo)
+	{
+		if (rand(0, 1)) {
+			$this->foo = $foo;
+		}
+		$this->foo = 0;
+	}
+}
+
+class MaybeUninitialized
+{
+	private readonly int $foo;
+
+	public function __construct(int $foo)
+	{
+		if (rand(0, 1)) {
+			$this->foo = $foo;
+		}
+	}
+}