diff --git a/.github/workflows/elixir.yml b/.github/workflows/elixir.yml
index 3d918d70f..20d273898 100644
--- a/.github/workflows/elixir.yml
+++ b/.github/workflows/elixir.yml
@@ -91,7 +91,7 @@ jobs:
 
       - name: Create PLTs
         if: steps.plt_cache.outputs.cache-hit != 'true'
-        run: mix dialyzer --plt
+        run: MIX_ENV=dev mix dialyzer --plt
 
       - name: Save PLT cache
         id: plt_cache_save
@@ -104,4 +104,4 @@ jobs:
             priv/plts
 
       - name: Run dialyzer
-        run: mix dialyzer --format github --format dialyxir
+        run: MIX_ENV=dev mix dialyzer --format github --format dialyxir