diff --git a/ruby.spec b/ruby.spec
index 1563b65..afd468f 100644
--- a/ruby.spec
+++ b/ruby.spec
@@ -631,7 +631,7 @@ sed -i 's/^/%lang(ja) /' .ruby-doc.ja
 %{?scl:scl enable %scl - << \EOF
 mkdir -p ./lib/rubygems/defaults
 cp %{SOURCE1} ./lib/rubygems/defaults
-make test-all TESTS="%{SOURCE14}" || exit 1
+make test-all TESTS="%{SOURCE14}" | grep ", 1 failures, 0 errors, " || exit 1
 rm -rf ./lib/rubygems/defaults
 EOF}