diff --git a/python/servo/testing_commands.py b/python/servo/testing_commands.py
index ddd8cc90918..7d76ad80e65 100644
--- a/python/servo/testing_commands.py
+++ b/python/servo/testing_commands.py
@@ -497,8 +497,7 @@ class MachCommands(CommandBase):
         # Check that a release servo build exists
         bin_path = path.abspath(self.get_binary_path(release, dev))
 
-        return check_call(
-            [run_file, cmd, bin_path, base_dir])
+        return call([run_file, cmd, bin_path, base_dir])
 
     def dromaeo_test_runner(self, tests, release, dev):
         self.ensure_bootstrapped()