diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 27b3afe36f658020b201431ef777963aa0d5a570..7bf63be26e404c626ae242782913530eba518e7d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -104,7 +104,7 @@ minimal-windows:
     - env
     - pip list
     - python -c "import numpy"
-    - py.test -v -m "not (notebook or longrun)"
+    - py.test -v -n $NUM_CORES -m "not (notebook or longrun)"
 
 ubuntu:
   stage: test