diff --git a/src/Type/Php/DatePeriodConstructorReturnTypeExtension.php b/src/Type/Php/DatePeriodConstructorReturnTypeExtension.php
index 180b5481f25..ec96f494cc3 100644
--- a/src/Type/Php/DatePeriodConstructorReturnTypeExtension.php
+++ b/src/Type/Php/DatePeriodConstructorReturnTypeExtension.php
@@ -34,21 +34,28 @@ public function getTypeFromStaticMethodCall(MethodReflection $methodReflection,
 			$thirdArgType = $scope->getType($methodCall->getArgs()[2]->value);
 		}
 
-		if (
-				$thirdArgType instanceof ObjectType
-			&& (new ObjectType(DateTimeInterface::class))->isSuperTypeOf($thirdArgType)->yes()
-		) {
+		if (!$thirdArgType instanceof Type) {
+			return new GenericObjectType(DatePeriod::class, [
+				new NullType(),
+				new IntegerType(),
+			]);
+		}
+
+		if ((new ObjectType(DateTimeInterface::class))->isSuperTypeOf($thirdArgType)->yes()) {
+			return new GenericObjectType(DatePeriod::class, [
+				new ObjectType(DateTimeInterface::class),
+				new NullType(),
+			]);
+		}
 
+		if ((new IntegerType())->isSuperTypeOf($thirdArgType)->yes()) {
 			return new GenericObjectType(DatePeriod::class, [
 				new ObjectType(DateTimeInterface::class),
 				new NullType(),
 			]);
 		}
 
-		return new GenericObjectType(DatePeriod::class, [
-			new NullType(),
-			new IntegerType(),
-		]);
+		return new ObjectType(DatePeriod::class);
 	}
 
 }
diff --git a/tests/PHPStan/Analyser/NodeScopeResolverTest.php b/tests/PHPStan/Analyser/NodeScopeResolverTest.php
index 8da3ce9d1d7..292b8f62080 100644
--- a/tests/PHPStan/Analyser/NodeScopeResolverTest.php
+++ b/tests/PHPStan/Analyser/NodeScopeResolverTest.php
@@ -623,16 +623,16 @@ public function dataFileAsserts(): iterable
 			yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-5698-php7.php');
 		}
 
+		if (PHP_VERSION_ID < 70304) {
+			yield from $this->gatherAssertTypes(__DIR__ . '/data/date-period-return-types.php');
+		}
+
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-6404.php');
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-6399.php');
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-4357.php');
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-5817.php');
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/array-column.php');
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/template-null-bound.php');
-
-		if (PHP_VERSION_ID >= 70304) {
-			yield from $this->gatherAssertTypes(__DIR__ . '/data/date-period-return-types.php');
-		}
 	}
 
 	/**
diff --git a/tests/PHPStan/Analyser/data/date-period-return-types.php b/tests/PHPStan/Analyser/data/date-period-return-types.php
index 24654c00b82..2694c556351 100644
--- a/tests/PHPStan/Analyser/data/date-period-return-types.php
+++ b/tests/PHPStan/Analyser/data/date-period-return-types.php
@@ -11,19 +11,19 @@
 $datePeriodList = [];
 
 $datePeriod = new DatePeriod($start, $interval, $end);
-assertType(\DatePeriod::class, $datePeriod);
+assertType(\DatePeriod::class . '<DateTimeInterface, null>', $datePeriod);
 assertType(\DateTimeInterface::class, $datePeriod->getEndDate());
 assertType('null', $datePeriod->getRecurrences());
 $datePeriodList[] = $datePeriod;
 
 $datePeriod = new DatePeriod($start, $interval, $recurrences);
-assertType(\DatePeriod::class, $datePeriod);
+assertType(\DatePeriod::class . '<null, int>', $datePeriod);
 assertType('null', $datePeriod->getEndDate());
 assertType('int', $datePeriod->getRecurrences());
 $datePeriodList[] = $datePeriod;
 
 $datePeriod = new DatePeriod($iso);
-assertType(\DatePeriod::class, $datePeriod);
+assertType(\DatePeriod::class . '<null, int>', $datePeriod);
 assertType('null', $datePeriod->getEndDate());
 assertType('int', $datePeriod->getRecurrences());
 $datePeriodList[] = $datePeriod;