diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index e6faa9b..c61e625 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -58,11 +58,9 @@ jobs:
       # Make sure your committed .env.dist.testing file ends with a newline.
       # The formatting of the contents to include a blank newline is deliberate.
       - name: Define GitHub Secrets in .env.dist.testing
-        uses: DamianReeves/write-file-action@v1.3
-        with:
-          path: .env.dist.testing
-          contents: |
-
+        run: |
+            cat >> .env.dist.testing <<EOF
+            
             CONVERTKIT_OAUTH_ACCESS_TOKEN=${{ env.KIT_OAUTH_ACCESS_TOKEN }}
             CONVERTKIT_OAUTH_REFRESH_TOKEN=${{ env.KIT_OAUTH_REFRESH_TOKEN }}
             CONVERTKIT_OAUTH_ACCESS_TOKEN_NO_DATA=${{ env.KIT_OAUTH_ACCESS_TOKEN_NO_DATA }}
@@ -71,7 +69,7 @@ jobs:
             CONVERTKIT_OAUTH_CLIENT_ID=${{ secrets.CONVERTKIT_OAUTH_CLIENT_ID }}
             CONVERTKIT_OAUTH_CLIENT_SECRET=${{ secrets.CONVERTKIT_OAUTH_CLIENT_SECRET }}
             CONVERTKIT_OAUTH_REDIRECT_URI=${{ secrets.CONVERTKIT_OAUTH_REDIRECT_URI }}
-          write-mode: append
+            EOF
 
       # Rename .env.dist.testing to .env, so PHPUnit reads it for tests.
       - name: Rename .env.dist.testing to .env