diff --git a/app/Http/Controllers/ReportController.php b/app/Http/Controllers/ReportController.php
index c53514c3..6cb13276 100644
--- a/app/Http/Controllers/ReportController.php
+++ b/app/Http/Controllers/ReportController.php
@@ -150,7 +150,11 @@ class ReportController extends Controller
 
     public static function returnScore($report)
     {
-        if ($report->status == Report::PENDING && ($score = option('reporter_score_modification', 0)) < 0) {
+        if (
+            $report->status == Report::PENDING &&
+            ($score = option('reporter_score_modification', 0)) < 0 &&
+            $report->informer
+        ) {
             $report->informer->score -= $score;
             $report->informer->save();
         }
@@ -158,7 +162,7 @@ class ReportController extends Controller
 
     public static function giveAward($report)
     {
-        if ($report->status == Report::PENDING) {
+        if ($report->status == Report::PENDING && $report->informer) {
             $report->informer->score += option('reporter_reward_score', 0);
             $report->informer->save();
         }
diff --git a/tests/HttpTest/ControllersTest/ReportControllerTest.php b/tests/HttpTest/ControllersTest/ReportControllerTest.php
index f079e8a0..23cb6f28 100644
--- a/tests/HttpTest/ControllersTest/ReportControllerTest.php
+++ b/tests/HttpTest/ControllersTest/ReportControllerTest.php
@@ -300,6 +300,26 @@ class ReportControllerTest extends TestCase
 
             return true;
         });
+
+        $texture = Texture::factory()->create();
+        // no errors should be occurred even reporter doesn't exist
+        $report = new Report();
+        $report->tid = $texture->tid;
+        $report->uploader = $uploader->uid;
+        $report->reporter = 0;
+        $report->reason = 'test';
+        $report->status = Report::PENDING;
+        $report->save();
+        $report->refresh();
+        $id = $report->id;
+        $tid = $texture->tid;
+        $this->actingAs($admin)
+            ->putJson('/admin/reports/'.$report->id, ['action' => 'delete'])
+            ->assertJson([
+                'code' => 0,
+                'message' => trans('general.op-success'),
+                'data' => ['status' => Report::RESOLVED],
+            ]);
     }
 
     public function testReviewDeleteNonExistentTexture()
@@ -426,5 +446,25 @@ class ReportControllerTest extends TestCase
                 'code' => 1,
                 'message' => trans('admin.users.operations.non-existent'),
             ]);
+
+        $uploader->permission = User::NORMAL;
+        $uploader->save();
+        // no errors should be occurred even reporter doesn't exist
+        $report = new Report();
+        $report->tid = $texture->tid;
+        $report->uploader = $uploader->uid;
+        $report->reporter = $reporter->uid;
+        $report->reason = 'test';
+        $report->status = Report::PENDING;
+        $report->save();
+        $report->refresh();
+        $id = $report->id;
+        $this->actingAs($admin)
+            ->putJson('/admin/reports/'.$report->id, ['action' => 'ban'])
+            ->assertJson([
+                'code' => 0,
+                'message' => trans('general.op-success'),
+                'data' => ['status' => Report::RESOLVED],
+            ]);
     }
 }