diff --git a/tests/ByIssueLevelAndTypeReportTest.php b/tests/ByIssueLevelAndTypeReportTest.php
index 023aa9936d8..671e63f4419 100644
--- a/tests/ByIssueLevelAndTypeReportTest.php
+++ b/tests/ByIssueLevelAndTypeReportTest.php
@@ -72,7 +72,7 @@ public function testItGeneratesReport(): void
         EXPECTED, $report->create());
     }
 
-    public function issueData(int $errorLevel, string $type): IssueData
+    private function issueData(int $errorLevel, string $type): IssueData
     {
         return new IssueData(
             'error',