diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 9b237c2..97b6bfd 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -25,6 +25,8 @@ concurrency:
 jobs:
   test:
     name: End-to-end tests
+    # Gitea also discovers .github/workflows; this keeps the run on GitHub only.
+    if: github.server_url == 'https://github.com'
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -43,6 +45,7 @@ jobs:
   release:
     name: Build and publish
     needs: test
+    if: github.server_url == 'https://github.com'
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4