diff --git a/python-convertdate.changes b/python-convertdate.changes
index 77e9f24..44b6631 100644
--- a/python-convertdate.changes
+++ b/python-convertdate.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Fri Oct 18 06:56:11 UTC 2019 - Dirk Mueller <dmueller@suse.com>
+
+- fix execution of tests on anything older than Tumbleweed
+
 -------------------------------------------------------------------
 Fri Sep 13 13:31:50 UTC 2019 - Jan Engelhardt <jengelh@inai.de>
 
diff --git a/python-convertdate.spec b/python-convertdate.spec
index 8eb3d9a..a127a5a 100644
--- a/python-convertdate.spec
+++ b/python-convertdate.spec
@@ -46,15 +46,16 @@ Hebrew, Indian Civil, Islamic, ISO, Julian, Mayan and Persian.
 %setup -q -n convertdate-%{version}
 
 %build
-export LANG="en_US.UTF8"
+export LC_ALL="en_US.UTF8"
 %python_build
 
 %install
-export LANG="en_US.UTF8"
+export LC_ALL="en_US.UTF8"
 %python_install
 %python_expand %fdupes %{buildroot}%{$python_sitelib}
 
 %check
+export LC_ALL="en_US.UTF8"
 %python_exec setup.py test
 
 %files %{python_files}