diff --git a/.forgejo/workflows/publish-docker.yml b/.forgejo/workflows/publish-docker.yml
index 594e5a3..6310cf7 100644
--- a/.forgejo/workflows/publish-docker.yml
+++ b/.forgejo/workflows/publish-docker.yml
@@ -55,13 +55,16 @@ jobs:
       # node:20-alpine n'a pas git préinstallé - même approche de clone
       # manuel que le job publish (pas d'actions/checkout, action JS qui a
       # ses propres soucis dans les conteneurs Alpine minimalistes ici).
+      # Sur une PR, `ref_name` vaut le numéro de la PR (ex. `29`), qui n'est
+      # pas une ref récupérable ("couldn't find remote ref 29") : on récupère
+      # alors la branche source de la PR (`head_ref`, vide hors PR).
       - name: Récupérer les sources
         run: |
           set -eu
           apk add --no-cache git
           git init -q
           git remote add origin "${{ github.server_url }}/${{ github.repository }}.git"
-          git fetch -q --depth 1 origin "${{ github.ref_name }}"
+          git fetch -q --depth 1 origin "${{ github.head_ref || github.ref_name }}"
           git checkout -q FETCH_HEAD
 
       - name: Serveur - installer les dépendances
diff --git a/server/test/staticPartyService.test.ts b/server/test/staticPartyService.test.ts
index 98c1ca8..c2aa116 100644
--- a/server/test/staticPartyService.test.ts
+++ b/server/test/staticPartyService.test.ts
@@ -195,11 +195,15 @@ describe('StaticPartyStore', () => {
     const otherFile = path.join(partiesDir(), `${other.id}.json`);
     const past = new Date(Date.now() - 60000);
     fs.utimesSync(otherFile, past, past);
+    // Compared against what the filesystem itself reports back, not
+    // past.getTime(): Linux returns mtimeMs as a float that can land a
+    // hair off the exact millisecond set (e.g. ...780.999 for ...781).
+    const mtimeBefore = fs.statSync(otherFile).mtimeMs;
 
     StaticPartyService.markWatched(sp, alice, 'e1');
     await StaticPartyStore.writeNow();
 
-    assert.equal(fs.statSync(otherFile).mtimeMs, past.getTime(), 'the untouched party\'s file was not rewritten');
+    assert.equal(fs.statSync(otherFile).mtimeMs, mtimeBefore, 'the untouched party\'s file was not rewritten');
   });
 
   it('deleting a party removes its file, even with a save still pending', async () => {