diff --git a/roaring/roaring.go b/roaring/roaring.go
index 21e87ed0f..9b734effe 100644
--- a/roaring/roaring.go
+++ b/roaring/roaring.go
@@ -673,6 +673,7 @@ func (b *Bitmap) Check() error {
 	return a
 }
 
+//Perform a logical negate of the bits in the range [start,end].
 func (b *Bitmap) Flip(start, end uint64) *Bitmap {
 	result := NewBitmap()
 	itr := b.Iterator()
diff --git a/roaring/roaring_test.go b/roaring/roaring_test.go
index 619e194e2..3cf3548de 100644
--- a/roaring/roaring_test.go
+++ b/roaring/roaring_test.go
@@ -168,8 +168,8 @@ func TestBitmap_Xor_BitmapBitmap(t *testing.T) {
 	}
 }
 
-// Ensure bitmap turn on and turn off
-func TestBitmap_Fipp_Empty(t *testing.T) {
+// Ensure bitmap contents alternate.
+func TestBitmap_Flip_Empty(t *testing.T) {
 	bm := roaring.NewBitmap()
 	results := bm.Flip(0, 10)
 	if n := results.Count(); n != 10 {
@@ -182,7 +182,7 @@ func TestBitmap_Fipp_Empty(t *testing.T) {
 }
 
 // Test Subrange Flip should not affect bits outside of Range
-func TestBitmap_Fipp_Array(t *testing.T) {
+func TestBitmap_Flip_Array(t *testing.T) {
 	bm := roaring.NewBitmap(0, 1, 2, 3, 4, 8, 16, 32, 64, 128, 256, 512, 1024)
 	results := bm.Flip(0, 5)
 	if n := results.Count(); n != 8 {
@@ -195,7 +195,7 @@ func TestBitmap_Fipp_Array(t *testing.T) {
 
 }
 
-func TestBitmap_Fipp_Bitmap(t *testing.T) {
+func TestBitmap_Flip_Bitmap(t *testing.T) {
 	bm := roaring.NewBitmap()
 	size := uint64(10000)
 	for i := uint64(0); i < size; i += 2 {