diff --git a/error_test.go b/error_test.go
index 755e386..65f9d7f 100644
--- a/error_test.go
+++ b/error_test.go
@@ -33,6 +33,32 @@ func Test_StoneWrap(t *testing.T) {
 	t.Log(stoneError)
 }
 
+func Test_NormalUnwrap(t *testing.T) {
+	normalError := errors.New("test")
+	stoneError := Wrap(normalError, 1, "test")
+
+	unwrap := stoneError.Unwrap()
+
+	if IsStoneError(unwrap) {
+		t.Fail()
+	} else {
+		t.Log(stoneError)
+	}
+}
+
+func Test_StoneUnwrap(t *testing.T) {
+	normalError := New(1, "test")
+	stoneError := Wrap(normalError, 1, "test")
+
+	unwrap := stoneError.Unwrap()
+
+	if !IsStoneError(unwrap) {
+		t.Fail()
+	} else {
+		t.Log(stoneError)
+	}
+}
+
 func Test_ToJSON(t *testing.T) {
 	stoneError := New(1, "test").
 		WithMetadata("key", "value").