diff --git a/tests/PHPStan/Testing/data/assert-type-case-insensitive.php b/tests/PHPStan/Testing/data/assert-type-case-insensitive.php
index 7738ae6f38..6ab46b7eec 100644
--- a/tests/PHPStan/Testing/data/assert-type-case-insensitive.php
+++ b/tests/PHPStan/Testing/data/assert-type-case-insensitive.php
@@ -2,7 +2,7 @@
 
 namespace MissingTypeCaseSensitive;
 
-function doFoo(string $s) {
+function doFoo1(string $s) {
 	assertTYPe('string', $s);
 }
 
diff --git a/tests/PHPStan/Testing/data/assert-type-missing-namespace.php b/tests/PHPStan/Testing/data/assert-type-missing-namespace.php
index d0f9018efa..849d0843b6 100644
--- a/tests/PHPStan/Testing/data/assert-type-missing-namespace.php
+++ b/tests/PHPStan/Testing/data/assert-type-missing-namespace.php
@@ -2,7 +2,7 @@
 
 namespace MissingAssertTypeNamespace;
 
-function doFoo(string $s) {
+function doFoo1(string $s) {
 	assertType('string', $s);
 }
 
diff --git a/tests/PHPStan/Testing/data/assert-type-wrong-namespace.php b/tests/PHPStan/Testing/data/assert-type-wrong-namespace.php
index 67715fd548..4f452560a2 100644
--- a/tests/PHPStan/Testing/data/assert-type-wrong-namespace.php
+++ b/tests/PHPStan/Testing/data/assert-type-wrong-namespace.php
@@ -4,7 +4,7 @@
 
 use function SomeWrong\Namespace\assertType;
 
-function doFoo(string $s) {
+function doFoo1(string $s) {
 	assertType('string', $s);
 }
 
diff --git a/tests/PHPStan/Type/MixedTypeTest.php b/tests/PHPStan/Type/MixedTypeTest.php
index 797bb05fb5..20baf951f9 100644
--- a/tests/PHPStan/Type/MixedTypeTest.php
+++ b/tests/PHPStan/Type/MixedTypeTest.php
@@ -1139,7 +1139,7 @@ public function testEquals(MixedType $mixedType, Type $typeToCompare, bool $expe
 		);
 	}
 
-	public function dataEquals(): array
+	public static function dataEquals(): array
 	{
 		return [
 			[