diff --git a/rubygem-power_assert.spec b/rubygem-power_assert.spec
index c79794d..fbfb5fb 100644
--- a/rubygem-power_assert.spec
+++ b/rubygem-power_assert.spec
@@ -2,7 +2,7 @@
 
 Name:		rubygem-%{gem_name}
 Version:	1.1.6
-Release:	200%{?dist}
+Release:	201%{?dist}
 
 Summary:	Power Assert for Ruby
 License:	Ruby or BSD
@@ -78,7 +78,7 @@ pushd .%{gem_instdir}
 LANG=C.utf8
 ruby -Ilib:. \
 	-e \
-	'Dir.glob("test/test*.rb").each {|f| require f}'
+	'Dir.glob("test/**/*_test.rb").each {|f| require f}'
 popd
 
 %files
@@ -95,7 +95,7 @@ popd
 %doc	%{gem_docdir}
 
 %changelog
-* Mon Feb 24 2020 Mamoru TASAKA <mtasaka@fedoraproject.org> - 1.1.6-200
+* Mon Feb 24 2020 Mamoru TASAKA <mtasaka@fedoraproject.org> - 1.1.6-201
 - 1.1.6
 
 * Thu Jan 30 2020 Fedora Release Engineering <releng@fedoraproject.org> - 1.1.5-201