diff --git a/src/Support/Import/ArchiveManager.php b/src/Support/Import/ArchiveManager.php
index 720db63..4fa92d0 100644
--- a/src/Support/Import/ArchiveManager.php
+++ b/src/Support/Import/ArchiveManager.php
@@ -150,11 +150,11 @@ public function delete($token)
      */
     public function prune()
     {
-        $files = $this->disk->listContents();
+        $files = $this->disk->listContents('/');
         $limit = Carbon::now()->subWeek()->getTimestamp();
-        foreach ($files as $metadata) {
-            if ($metadata['timestamp'] < $limit) {
-                $this->disk->delete($metadata['path']);
+        foreach ($files as $file) {
+            if ($file->lastModified() < $limit) {
+                $this->disk->delete($file->path());
             }
         }
     }
diff --git a/tests/Support/Export/PublicLabelTreeExportTest.php b/tests/Support/Export/PublicLabelTreeExportTest.php
index b96994b..7b769c7 100644
--- a/tests/Support/Export/PublicLabelTreeExportTest.php
+++ b/tests/Support/Export/PublicLabelTreeExportTest.php
@@ -26,8 +26,8 @@ public function testGetContent()
             'description' => $tree->description,
             'uuid' => $tree->uuid,
             'version' => null,
-            'created_at' => (string) $tree->created_at,
-            'updated_at' => (string) $tree->updated_at,
+            'created_at' => $tree->created_at->toJson(),
+            'updated_at' => $tree->updated_at->toJson(),
         ];
 
         $this->assertEquals($expect, $export->getContent());
@@ -51,8 +51,8 @@ public function testGetContentVersion()
                 'name' => $version->name,
                 'doi' => $version->doi,
             ],
-            'created_at' => (string) $tree->created_at,
-            'updated_at' => (string) $tree->updated_at,
+            'created_at' => $tree->created_at->toJson(),
+            'updated_at' => $tree->updated_at->toJson(),
         ];
 
         $this->assertEquals($expect, $export->getContent());
diff --git a/tests/Support/Import/ArchiveManagerTest.php b/tests/Support/Import/ArchiveManagerTest.php
index 587869a..be914b4 100644
--- a/tests/Support/Import/ArchiveManagerTest.php
+++ b/tests/Support/Import/ArchiveManagerTest.php
@@ -53,7 +53,7 @@ public function testStoreUserExportNotAllowed()
             $this->assertFalse(true);
         } catch (Exception $e) {
             $this->assertStringContainsString('User imports are not allowed', $e->getMessage());
-            $this->assertEmpty(Storage::disk('test')->listContents());
+            $this->assertEmpty(Storage::disk('test')->listContents('/')->toArray());
         }
     }
 
@@ -83,7 +83,7 @@ public function testStoreLabelTreeExportNotAllowed()
             $this->assertFalse(true);
         } catch (Exception $e) {
             $this->assertStringContainsString('Label tree imports are not allowed', $e->getMessage());
-            $this->assertEmpty(Storage::disk('test')->listContents());
+            $this->assertEmpty(Storage::disk('test')->listContents('/')->toArray());
         }
     }
 
@@ -113,7 +113,7 @@ public function testStoreVolumeExportNotAllowed()
             $this->assertFalse(true);
         } catch (Exception $e) {
             $this->assertStringContainsString('Volume imports are not allowed', $e->getMessage());
-            $this->assertEmpty(Storage::disk('test')->listContents());
+            $this->assertEmpty(Storage::disk('test')->listContents('/')->toArray());
         }
     }
 
@@ -175,7 +175,7 @@ public function testPrune()
 
         $manager = new ArchiveManager;
         $token = $manager->store($file);
-        $path = Storage::disk('test')->getAdapter()->applyPathPrefix($token);
+        $path = storage_path("framework/testing/disks/test/{$token}");
 
         $manager->prune();
         $this->assertTrue($manager->has($token));