diff --git a/borg/testsuite/archiver.py b/borg/testsuite/archiver.py
index 6c74cca04..e7f805ed4 100644
--- a/borg/testsuite/archiver.py
+++ b/borg/testsuite/archiver.py
@@ -1263,12 +1263,18 @@ class ArchiverTestCase(ArchiverTestCaseBase):
         with open(export_file, 'w') as fd:
             fd.write('something not a key\n')
 
-        self.assert_raises(NotABorgKeyFile, lambda: self.cmd('key', 'import', self.repository_location, export_file))
+        if self.FORK_DEFAULT:
+            self.cmd('key', 'import', self.repository_location, export_file, exit_code=2)
+        else:
+            self.assert_raises(NotABorgKeyFile, lambda: self.cmd('key', 'import', self.repository_location, export_file))
 
         with open(export_file, 'w') as fd:
             fd.write('BORG_KEY a0a0a0\n')
 
-        self.assert_raises(RepoIdMismatch, lambda: self.cmd('key', 'import', self.repository_location, export_file))
+        if self.FORK_DEFAULT:
+            self.cmd('key', 'import', self.repository_location, export_file, exit_code=2)
+        else:
+            self.assert_raises(RepoIdMismatch, lambda: self.cmd('key', 'import', self.repository_location, export_file))
 
     def test_key_export_paperkey(self):
         repo_id = 'e294423506da4e1ea76e8dcdf1a3919624ae3ae496fddf905610c351d3f09239'