diff --git a/system/os_test.go b/system/os_test.go
index 1e8a138..911605f 100644
--- a/system/os_test.go
+++ b/system/os_test.go
@@ -45,7 +45,7 @@ func TestExecCommand(t *testing.T) {
 	assert := internal.NewAssert(t, "TestExecCommand")
 
 	// linux or mac
-	stdout, stderr, err := ExecCommand("ls", WithForeground())
+	stdout, stderr, err := ExecCommand("ls")
 	t.Log("std out: ", stdout)
 	t.Log("std err: ", stderr)
 	assert.Equal("", stderr)