diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 4a0849e45..0a72dbe28 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -85,7 +85,7 @@ jobs:
       fail-fast: false
       matrix:
         sdk: [ 2.15.0, stable, beta ]
-        platform: [ vm, chrome ]
+        platform: [ vm, chrome, firefox ]
     steps:
       - uses: actions/checkout@v3
       - uses: dart-lang/setup-dart@v1.3
diff --git a/dio/dart_test.yaml b/dio/dart_test.yaml
index 149442f40..b07c631c9 100644
--- a/dio/dart_test.yaml
+++ b/dio/dart_test.yaml
@@ -2,7 +2,6 @@ file_reporters:
   json: build/reports/test-results.json
 
 override_platforms:
-  chrome:
+  firefox:
     settings:
-      # disable web security to allow CORS requests
-      arguments: --disable-web-security
+      arguments: -headless