diff --git a/packages/imp_test.go b/packages/imp_test.go
index acf6dc31..7fcb190e 100644
--- a/packages/imp_test.go
+++ b/packages/imp_test.go
@@ -56,4 +56,13 @@ func Test_loadByExport(t *testing.T) {
 	FindExport(".", "C")
 }
 
+func TestGoListExportCacheSync(t *testing.T) {
+	GoListExportCacheSync("..")
+	p := NewImporter(nil, "..")
+	pkg, err := p.Import("github.com/goplus/gox/internal/foo")
+	if err != nil {
+		t.Fatal("Import failed:", pkg, err)
+	}
+}
+
 // ----------------------------------------------------------------------------