diff --git a/test/appveyor.yml b/test/appveyor.yml
index 716fc1d..599c4cd 100644
--- a/test/appveyor.yml
+++ b/test/appveyor.yml
@@ -42,7 +42,7 @@ before_build:
     - git remote add --no-tags -t %BRANCH_TO_TEST% origin https://github.com/boostorg/boost.git
     - git fetch --depth=1
     - git checkout %BRANCH_TO_TEST%
-    - git submodule update --jobs=4 --init --merge
+    - git submodule update --init --merge
     - git remote set-branches --add origin %BRANCH_TO_TEST%
     - git pull --recurse-submodules
     - git status