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-rw-r--r--tests/functional/qemu_test/asset.py16
1 files changed, 14 insertions, 2 deletions
diff --git a/tests/functional/qemu_test/asset.py b/tests/functional/qemu_test/asset.py
index 704b84d0ea..2dd32bf28d 100644
--- a/tests/functional/qemu_test/asset.py
+++ b/tests/functional/qemu_test/asset.py
@@ -15,7 +15,7 @@ import urllib.request
 from time import sleep
 from pathlib import Path
 from shutil import copyfileobj
-from urllib.error import HTTPError
+from urllib.error import HTTPError, URLError
 
 class AssetError(Exception):
     def __init__(self, asset, msg, transient=False):
@@ -72,6 +72,10 @@ class Asset:
         return self.hash == hl.hexdigest()
 
     def valid(self):
+        if os.getenv("QEMU_TEST_REFRESH_CACHE", None) is not None:
+            self.log.info("Force refresh of asset %s", self.url)
+            return False
+
         return self.cache_file.exists() and self._check(self.cache_file)
 
     def fetchable(self):
@@ -167,9 +171,17 @@ class Asset:
                     raise AssetError(self, "Unable to download: "
                                      "HTTP error %d" % e.code)
                 continue
+            except URLError as e:
+                # This is typically a network/service level error
+                # eg urlopen error [Errno 110] Connection timed out>
+                tmp_cache_file.unlink()
+                self.log.error("Unable to download %s: URL error %s",
+                               self.url, e.reason)
+                raise AssetError(self, "Unable to download: URL error %s" %
+                                 e.reason, transient=True)
             except Exception as e:
                 tmp_cache_file.unlink()
-                raise AssetError(self, "Unable to download: " % e)
+                raise AssetError(self, "Unable to download: %s" % e)
 
         if not os.path.exists(tmp_cache_file):
             raise AssetError(self, "Download retries exceeded", transient=True)