diff --git a/.forgejo/workflows/cascade-forgejo.yml b/.forgejo/workflows/cascade-forgejo.yml
index c1c09565..ad422aa7 100644
--- a/.forgejo/workflows/cascade-forgejo.yml
+++ b/.forgejo/workflows/cascade-forgejo.yml
@@ -28,6 +28,7 @@ on:
       - 'wip-cascade'
   pull_request_target:
     types:
+      - opened
       - synchronize
       - labeled
       - closed
@@ -63,7 +64,7 @@ jobs:
     # Always run when a commit is pushed to the main or wip-cascade branch
     # If this is a pull request, run
     #   - when the `run-forgejo-tests` label is set (label_updated) (but not if another label is set or if a label is removed)
-    #   - when a new commit is pushed to the pull request (synchronized) if the `run-forgejo-tests` is already present
+    #   - when a new commit is pushed to the pull request (synchronized or opened) if the `run-forgejo-tests` is already present
     #   - when the pull request is closed, which also happens when it is merged, so that the Forgejo pull request is closed
     #
     if: >
@@ -73,7 +74,7 @@ jobs:
         ) || (
           forge.event_name == 'pull_request_target' && (
             forge.event.action == 'closed' ||
-            ( forge.event.action == 'synchronized' && contains(forge.event.pull_request.labels.*.name, 'run-forgejo-tests') ) ||
+            ( ( forge.event.action == 'synchronized' || forge.event.action == 'opened' ) && contains(forge.event.pull_request.labels.*.name, 'run-forgejo-tests') ) ||
             ( forge.event.action == 'label_updated' && forge.event.label.name == 'run-forgejo-tests' )
           )
         )
diff --git a/.forgejo/workflows/cascade-setup-forgejo.yml b/.forgejo/workflows/cascade-setup-forgejo.yml
index fff2309f..968ecffc 100644
--- a/.forgejo/workflows/cascade-setup-forgejo.yml
+++ b/.forgejo/workflows/cascade-setup-forgejo.yml
@@ -27,6 +27,7 @@ on:
       - 'wip-cascade'
   pull_request_target:
     types:
+      - opened
       - synchronize
       - labeled
       - closed
@@ -62,7 +63,7 @@ jobs:
     # Always run when a commit is pushed to the wip-cascade branch
     # If this is a pull request, run
     #   - when the `run-end-to-end-tests` label is set (label_updated) (but not if another label is set or if a label is removed)
-    #   - when a new commit is pushed to the pull request (synchronized) if the `run-end-to-end-tests` is already present
+    #   - when a new commit is pushed to the pull request (synchronized or opened) if the `run-end-to-end-tests` is already present
     #   - when the pull request is closed, which also happens when it is merged, so that the setup-forgejo & end-to-end pull requests are closed
     #
     if: >
@@ -72,7 +73,7 @@ jobs:
         ) || (
           forge.event_name == 'pull_request_target' && (
             forge.event.action == 'closed' ||
-            ( forge.event.action == 'synchronized' && contains(forge.event.pull_request.labels.*.name, 'run-end-to-end-tests') ) ||
+            ( ( forge.event.action == 'synchronized' || forge.event.action == 'opened' ) && contains(forge.event.pull_request.labels.*.name, 'run-end-to-end-tests') ) ||
             ( forge.event.action == 'label_updated' && forge.event.label.name == 'run-end-to-end-tests' )
           )
         )