diff --git a/python-pytest-html.changes b/python-pytest-html.changes
index 92a9720..2ee9041 100644
--- a/python-pytest-html.changes
+++ b/python-pytest-html.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sat Sep 14 02:06:22 UTC 2019 - John Vandenberg <jayvdb@gmail.com>
+
+- Define LANG in %check to fix openSUSE/SLE 15 builds
+
 -------------------------------------------------------------------
 Mon Aug 12 15:40:19 UTC 2019 - Tomáš Chvátal <tchvatal@suse.com>
 
diff --git a/python-pytest-html.spec b/python-pytest-html.spec
index 6bc1f52..2921e1b 100644
--- a/python-pytest-html.spec
+++ b/python-pytest-html.spec
@@ -58,6 +58,7 @@ pytest plugin for generating HTML reports
 
 %check
 export PYTHONDONTWRITEBYTECODE=1
+export LANG=en_US.UTF-8
 %pytest
 
 %files %{python_files}