diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index d588932..a87fdb9 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -38,7 +38,8 @@ jobs:
       - name: Install dependencies
         run: |
           apt-get update
-          apt-get install -qy --no-install-recommends libsqlite3-0 tzdata
+          apt-get install -qy --no-install-recommends \
+            libsqlite3-0 python3-cffi-backend tzdata
           uv tool install tox --with tox-gh-actions --with tox-uv
 
       - name: Run tests with tox
diff --git a/contrib/manual-zfssync.sh b/contrib/manual-zfssync.sh
index 6a170f2..e39c888 100755
--- a/contrib/manual-zfssync.sh
+++ b/contrib/manual-zfssync.sh
@@ -276,7 +276,7 @@ _recv() {
             echo "warning: We have newer snapshots ($newer_snapshots) after" \
                "$remote${commonsnap:-@(void)}, adding recv -F" >&2
         else
-            echo "warning: We have never snapshots ($newer_snapshots) after" \
+            echo "warning: We have newer snapshots ($newer_snapshots) after" \
                "$remote${commonsnap:-@(void)}, expect failure" >&2
         fi
     fi
diff --git a/contrib/planb-double-backup-sources.py b/contrib/planb-double-backup-sources.py
index 449eb3e..dd23232 100755
--- a/contrib/planb-double-backup-sources.py
+++ b/contrib/planb-double-backup-sources.py
@@ -63,7 +63,7 @@ def __iter__(self):
 
 def get_server_datasets(server):
     return check_output(
-        ['ssh', server, 'planb', 'blist', '--double'],
+        ['ssh', server, '-oLogLevel=error', 'planb', 'blist', '--double'],
         text=True).splitlines()