diff --git a/fstest/run.go b/fstest/run.go
index 4ffb33692..2f492d4db 100644
--- a/fstest/run.go
+++ b/fstest/run.go
@@ -60,11 +60,16 @@ type Run struct {
 	Logf, Fatalf func(text string, args ...any)
 }
 
+// ResetRun re-reads the command line arguments into the global run.
+func ResetRun() {
+	oneRun = newRun()
+}
+
 // TestMain drives the tests
 func TestMain(m *testing.M) {
 	flag.Parse()
 	if !*Individual {
-		oneRun = newRun()
+		ResetRun()
 	}
 	rc := m.Run()
 	if !*Individual {