diff --git a/swh/core/tarball.py b/swh/core/tarball.py
--- a/swh/core/tarball.py
+++ b/swh/core/tarball.py
@@ -54,7 +54,7 @@
 
     """
     try:
-        run(["unzip", "-d", extract_dir, zippath], check=True)
+        run(["unzip", "-q", "-d", extract_dir, zippath], check=True)
         return extract_dir
     except Exception as e:
         raise shutil.ReadError(