diff --git a/tests/test_connection.py b/tests/test_connection.py
index 76e83cf3..68de87ad 100755
--- a/tests/test_connection.py
+++ b/tests/test_connection.py
@@ -75,6 +75,9 @@ class ConnectionTests(unittest.TestCase):
         cur = conn.cursor()
         try:
             cur.execute("select pg_terminate_backend(pg_backend_pid())")
+        except psycopg2.DatabaseError, e:
+            # curiously in green mode we get a DatabaseError without pgcode
+            pass
         except psycopg2.OperationalError, e:
             if e.pgcode != psycopg2.errorcodes.ADMIN_SHUTDOWN:
                 raise