diff --git a/ant.spec b/ant.spec
index 36e4052..16bfd9c 100644
--- a/ant.spec
+++ b/ant.spec
@@ -463,7 +463,7 @@ cp -pr build/javadocs/* $RPM_BUILD_ROOT%{_javadocdir}/%{name}
 
 %if %with tests
 %check
-%{ant} test
+LC_ALL=en_US.utf8 %{ant} test
 %endif
 
 %files