diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a4b38c2..12b6c77 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,6 +5,8 @@ jobs:
   test:
     runs-on: ubuntu-latest
     name: OTP ${{matrix.otp}} / Elixir ${{matrix.elixir}}
+    env:
+      MIX_ENV: test
     strategy:
       matrix:
         include: