diff --git a/.forgejo/workflows/test.yaml b/.forgejo/workflows/test.yaml
index f7b16ab..006ee45 100644
--- a/.forgejo/workflows/test.yaml
+++ b/.forgejo/workflows/test.yaml
@@ -1,13 +1,45 @@
-on: [push]
+on:
+  push:
+    branches: [main]
+  pull_request:
+    types: [opened, synchronize, reopened]
 
 jobs:
 
+  ## NixOS configurations
+
+  nixosConfiguration-all:
+    runs-on: native
+    steps:
+      - uses: actions/checkout@v4
+      - run: nix build .#nixosConfigurations.all.config.system.build.toplevel
+
+  nixosConfiguration-mastodon:
+    runs-on: native
+    steps:
+      - uses: actions/checkout@v4
+      - run: nix build .#nixosConfigurations.mastodon.config.system.build.toplevel
+
+  nixosConfiguration-peertube:
+    runs-on: native
+    steps:
+      - uses: actions/checkout@v4
+      - run: nix build .#nixosConfigurations.peertube.config.system.build.toplevel
+
   nixosConfiguration-pixelfed:
     runs-on: native
     steps:
       - uses: actions/checkout@v4
       - run: nix build .#nixosConfigurations.pixelfed.config.system.build.toplevel
 
+  ## Checks
+
+  check-other-pixelfed-garage-fixme:
+    runs-on: native
+    steps:
+      - uses: actions/checkout@v4
+      - run: nix build .#checks.x86_64-linux.pixelfed-garage -L
+
   check-pixelfed-garage:
     runs-on: native
     steps: