diff --git a/cmd/macaron/main_test.go b/cmd/macaron/main_test.go
new file mode 100644
index 0000000..e419c53
--- /dev/null
+++ b/cmd/macaron/main_test.go
@@ -0,0 +1,68 @@
+package main
+
+import (
+	"os"
+	"testing"
+)
+
+func withArgs(args []string, fn func()) {
+	orig := osArgs()
+	setOsArgs(args)
+	defer setOsArgs(orig)
+	fn()
+}
+
+func TestNormalizeLegacySetup(t *testing.T) {
+	withArgs([]string{"macaron", "-setup"}, func() {
+		normalizeLegacyArgs()
+		if osArgs()[1] != "--setup" {
+			t.Fatalf("expected --setup, got %s", osArgs()[1])
+		}
+	})
+}
+
+func TestNormalizeCommandScan(t *testing.T) {
+	withArgs([]string{"macaron", "scan", "example.com", "--fast"}, func() {
+		normalizeCommandArgs()
+		args := osArgs()
+		want := []string{"macaron", "--scan", "example.com", "--fast"}
+		if len(args) != len(want) {
+			t.Fatalf("unexpected len: %#v", args)
+		}
+		for i := range want {
+			if args[i] != want[i] {
+				t.Fatalf("idx %d: got %q want %q", i, args[i], want[i])
+			}
+		}
+	})
+}
+
+func TestApplyProfilePassive(t *testing.T) {
+	mode := "wide"
+	rate := 150
+	threads := 30
+	stages := "all"
+	applyProfile("passive", &mode, &rate, &threads, &stages)
+	if mode != "osint" || rate != 40 || threads != 10 || stages != "subdomains,http,urls" {
+		t.Fatalf("unexpected passive values: mode=%s rate=%d threads=%d stages=%s", mode, rate, threads, stages)
+	}
+}
+
+func TestApplyProfileAggressive(t *testing.T) {
+	mode := "wide"
+	rate := 150
+	threads := 30
+	stages := "all"
+	applyProfile("aggressive", &mode, &rate, &threads, &stages)
+	if rate != 350 || threads != 70 || stages != "all" {
+		t.Fatalf("unexpected aggressive values: rate=%d threads=%d stages=%s", rate, threads, stages)
+	}
+}
+
+func osArgs() []string {
+	return append([]string(nil), os.Args...)
+}
+
+func setOsArgs(v []string) {
+	os.Args = append([]string(nil), v...)
+}