[tests] Show additional information with test_expired

Bug: T244982
Change-Id: Ib93546a5d0b41a024e95bb0e1cbd88b1bf174c8c
---
M tests/dry_api_tests.py
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/tests/dry_api_tests.py b/tests/dry_api_tests.py
index 4d29f85..9e61e60 100644
--- a/tests/dry_api_tests.py
+++ b/tests/dry_api_tests.py
@@ -74,9 +74,11 @@
 
     def test_expired(self):
         """Test if the request is expired."""
-        self.assertFalse(self.req._expired(datetime.datetime.utcnow()))
-        self.assertTrue(self.req._expired(
-            datetime.datetime.utcnow() - datetime.timedelta(days=2)))
+        now = datetime.datetime.utcnow()
+        self.assertFalse(self.req._expired(now))
+        self.assertTrue(
+            self.req._expired(now - datetime.timedelta(days=2)),
+            msg='\nreq.expiry: {}, now: {}'.format(self.req.expiry, now))
 
     def test_parameter_types(self):
         """Test _uniquedescriptionstr is identical using different ways."""

