diff --git a/.github/workflows/mocha_tests.yml b/.github/workflows/mocha_tests.yml
index cd789a0a..1d5c1571 100644
--- a/.github/workflows/mocha_tests.yml
+++ b/.github/workflows/mocha_tests.yml
@@ -30,6 +30,7 @@ jobs:
       matrix:
         browser: [chromium, firefox, webkit, iPhone, pixel]
       fail-fast: false
+      max-parallel: 1 # I think the tests are affected by running in parallel
     steps:
     - uses: actions/checkout@v3
     - uses: actions/setup-node@v3
@@ -42,4 +43,5 @@ jobs:
     - name: Run Mocha tests
       run: npm test # alias to "mocha test"
       env:
-        BROWSER: ${{ matrix.browser }}
\ No newline at end of file
+        BROWSER: ${{ matrix.browser }}
+        LOCAL: true # run tests locally instead of dev server
\ No newline at end of file