diff --git a/conftest.py b/conftest.py
--- a/conftest.py
+++ b/conftest.py
@@ -4,7 +4,6 @@
 # See top-level LICENSE file for more information
 
 pytest_plugins = [
-    "aiohttp.pytest_plugin",
     "swh.storage.pytest_plugin",
     "swh.loader.pytest_plugin",
 ]
diff --git a/swh/vault/cli.py b/swh/vault/cli.py
--- a/swh/vault/cli.py
+++ b/swh/vault/cli.py
@@ -165,11 +165,11 @@
 @click.pass_context
 def serve(ctx, config_file, host, port, debug):
     """Software Heritage Vault RPC server."""
-    import aiohttp
-
     from swh.vault.api.server import make_app_from_configfile
 
     ctx.ensure_object(dict)
+    if "log_level" in ctx.obj:
+        logging.getLogger("werkzeug").setLevel(ctx.obj["log_level"])
 
     try:
         app = make_app_from_configfile(config_file, debug=debug)
@@ -177,7 +177,7 @@
         click.echo(e.msg, err=True)
         ctx.exit(1)
 
-    aiohttp.web.run_app(app, host=host, port=int(port))
+    app.run(host, port=int(port), debug=debug)
 
 
 def main():