diff --git a/t/test-lib.sh b/t/test-lib.sh
index 44df51b..0ea1e5a 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -1083,7 +1083,8 @@
 
 		# adjust the overall time
 		junit_time=$(test-tool date getnanos $junit_suite_start)
-		sed "s/<testsuite [^>]*/& time=\"$junit_time\"/" \
+		sed -e "s/\(<testsuite.*\) time=\"[^\"]*\"/\1/" \
+			-e "s/<testsuite [^>]*/& time=\"$junit_time\"/" \
 			<"$junit_xml_path" >"$junit_xml_path.new"
 		mv "$junit_xml_path.new" "$junit_xml_path"