diff --git a/ports/windows/.appveyor.yml b/ports/windows/.appveyor.yml
index a82cf5adc9..9435ce6e67 100644
--- a/ports/windows/.appveyor.yml
+++ b/ports/windows/.appveyor.yml
@@ -22,7 +22,7 @@ test_script:
 - cmd: >-
     cd tests
 
-    %MICROPY_CPYTHON3% run-tests
+    %MICROPY_CPYTHON3% run-tests --auto-jobs
 
 skip_tags: true