diff --git a/classes/FileManager.php b/classes/FileManager.php
index 5e3c0f8..fbcc216 100644
--- a/classes/FileManager.php
+++ b/classes/FileManager.php
@@ -362,7 +362,7 @@ public function extract_attempt_data_from_artifact(stored_file $artifactfile, in
             // Search for attempt path
             $attemptpath = null;
             foreach ($metadata as $row) {
-                if ($row[0] == $attemptid) {
+                if (intval($row[0]) === $attemptid) {
                     $attemptpath = $row[9];
                     break;
                 }
diff --git a/tests/FileManager_test.php b/tests/FileManager_test.php
index e42d672..110dae5 100644
--- a/tests/FileManager_test.php
+++ b/tests/FileManager_test.php
@@ -605,7 +605,7 @@ public function test_extract_attempt_data_for_nonexisting_attemptid(): void {
         // Extract userdata from artifact into temporary stored_file
         $this->expectException(\moodle_exception::class);
         $this->expectExceptionMessageMatches('/Attempt not found/');
-        $fm->extract_attempt_data_from_artifact($storedArtifact, $job->get_id(), 0);
+        $fm->extract_attempt_data_from_artifact($storedArtifact, $job->get_id(), 9999999);
     }
 
     /**