commit 8459ed9460ab492adfd305875c717ebe31bf68f3
Author: wu.shiming <wushiming@yovole.com>
Date:   Wed Sep 30 11:49:38 2020 +0800

    requirements: Drop os-testr
    
    We've switched to stestr.
    
    Change-Id: I80cb1e658761aaf16943b12e3b4dc6f208cb2eee

diff --git a/lower-constraints.txt b/lower-constraints.txt
index fd817e4..998c5d8 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -66,7 +66,6 @@ openstacksdk==0.12.0
 os-api-ref==1.5.0
 os-client-config==1.29.0
 os-service-types==1.2.0
-os-testr==1.0.0
 os-win==3.0.0
 osc-lib==1.10.0
 oslo.cache==1.29.0