diff --git a/cl/builtin_test.go b/cl/builtin_test.go
index 7d14e476..c947bdd5 100644
--- a/cl/builtin_test.go
+++ b/cl/builtin_test.go
@@ -17,6 +17,7 @@
 package cl
 
 import (
+	"go/constant"
 	"go/types"
 	"testing"
 
@@ -44,6 +45,21 @@ func TestPkgKind(t *testing.T) {
 	}
 }
 
+func TestPkgKindOf(t *testing.T) {
+	if v := PkgKindOf(types.Unsafe); v != PkgDeclOnly {
+		t.Fatal("PkgKindOf unsafe:", v)
+	}
+	pkg := types.NewPackage("foo", "foo")
+	pkg.Scope().Insert(
+		types.NewConst(
+			0, pkg, "LLGoPackage", types.Typ[types.String],
+			constant.MakeString("noinit")),
+	)
+	if v := PkgKindOf(pkg); v != PkgNoInit {
+		t.Fatal("PkgKindOf foo:", v)
+	}
+}
+
 func TestIsAny(t *testing.T) {
 	if isAny(types.Typ[types.UntypedInt]) {
 		t.Fatal("isAny?")