diff --git a/roaring/roaring_test.go b/roaring/roaring_test.go
index 52353c692..c6f7b9693 100644
--- a/roaring/roaring_test.go
+++ b/roaring/roaring_test.go
@@ -46,11 +46,11 @@ func TestSize(t *testing.T) {
 
 	//bitmap
 	b := roaring.NewFileBitmap()
-	for i := uint64(0); i < 2048; i++ {
+	for i := uint64(0); i < 4096; i++ {
 		b.DirectAdd(i)
 	}
 
-	if b.Size() != 4096 {
+	if b.Size() != 8192 {
 		t.Fatalf("Size in bytes incorrect \n")
 	}
 	//convert to rle