diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e3d50c1..9133639 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -5,6 +5,7 @@ jobs:
   test-firefox:
     runs-on: ${{ matrix.os }}-latest
     strategy:
+      fail-fast: true
       matrix:
         os: [ubuntu, macos, windows]
         # pypy3 not yet up to speed with py3.9 typing hints