diff --git a/internal/cmd/validate_test.go b/internal/cmd/validate_test.go
index 20c1e5c6..36230e68 100644
--- a/internal/cmd/validate_test.go
+++ b/internal/cmd/validate_test.go
@@ -34,7 +34,7 @@ func TestMain(m *testing.M) {
 	os.Exit(code)
 }
 
-var durationRegex = regexp.MustCompile(`\([\d.]*[µmn]s\)`)
+var durationRegex = regexp.MustCompile(`\([\d.]*[µmn]?s\)`)
 
 func stripDuration(s string) string {
 	return durationRegex.ReplaceAllString(s, "(Xs)")