diff --git a/rubygem-power_assert.spec b/rubygem-power_assert.spec
index ca99f61..8167f74 100644
--- a/rubygem-power_assert.spec
+++ b/rubygem-power_assert.spec
@@ -2,7 +2,7 @@
 
 Name:		rubygem-%{gem_name}
 Version:	1.1.3
-Release:	201%{?dist}
+Release:	202%{?dist}
 
 Summary:	Power Assert for Ruby
 License:	Ruby or BSD
@@ -75,7 +75,7 @@ popd
 %check
 pushd .%{gem_instdir}
 # test-1.1.3/block_test.rb 1.1.3
-LANG=ja_JP.utf8
+LANG=C.utf8
 ruby -Ilib:. \
 	-e \
 	'gem "test-unit"; require "power_assert" ; Dir.glob("test/test*.rb").each {|f| require f}'
@@ -95,6 +95,10 @@ popd
 %doc	%{gem_docdir}
 
 %changelog
+* Sun Nov 18 2018 Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> - 1.1.3-202
+- Use C.UTF-8 locale
+  See https://fedoraproject.org/wiki/Changes/Remove_glibc-langpacks-all_from_buildroot
+
 * Sat Jul 14 2018 Fedora Release Engineering <releng@fedoraproject.org> - 1.1.3-201
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild