diff --git a/cmd/segment-reaper/bitmask.go b/cmd/segment-reaper/bit_array.go
similarity index 87%
rename from cmd/segment-reaper/bitmask.go
rename to cmd/segment-reaper/bit_array.go
index 3272f981a..f77315c38 100644
--- a/cmd/segment-reaper/bitmask.go
+++ b/cmd/segment-reaper/bit_array.go
@@ -9,9 +9,9 @@ import (
 	"github.com/zeebo/errs"
 )
 
-// errorBitmaskInvalidIdx is the error class to return invalid indexes for the
+// errorBitArrayInvalidIdx is the error class to return invalid indexes for the
 // the bitArray type.
-var errorBitmaskInvalidIdx = errs.Class("invalid index")
+var errorBitArrayInvalidIdx = errs.Class("invalid index")
 
 // bitArray allows easy access to bit values by indices.
 type bitArray []byte
@@ -22,7 +22,7 @@ func (bytes *bitArray) Set(index int) error {
 	bitIndex, byteIndex := index%8, index/8
 	switch {
 	case index < 0:
-		return errorBitmaskInvalidIdx.New("negative value (%d)", index)
+		return errorBitArrayInvalidIdx.New("negative value (%d)", index)
 	case byteIndex >= len(*bytes):
 		sizeToGrow := byteIndex - len(*bytes) + 1
 		*bytes = append(*bytes, make([]byte, sizeToGrow)...)
@@ -37,7 +37,7 @@ func (bytes *bitArray) Unset(index int) error {
 	bitIndex, byteIndex := index%8, index/8
 	switch {
 	case index < 0:
-		return errorBitmaskInvalidIdx.New("negative value (%d)", index)
+		return errorBitArrayInvalidIdx.New("negative value (%d)", index)
 	case byteIndex >= len(*bytes):
 		return nil
 	}
@@ -52,7 +52,7 @@ func (bytes *bitArray) Has(index int) (bool, error) {
 	bitIndex, byteIndex := index%8, index/8
 	switch {
 	case index < 0:
-		return false, errorBitmaskInvalidIdx.New("negative value (%d)", index)
+		return false, errorBitArrayInvalidIdx.New("negative value (%d)", index)
 	case byteIndex >= len(*bytes):
 		return false, nil
 	}
diff --git a/cmd/segment-reaper/bitmask_test.go b/cmd/segment-reaper/bit_array_test.go
similarity index 94%
rename from cmd/segment-reaper/bitmask_test.go
rename to cmd/segment-reaper/bit_array_test.go
index eb7a0ed36..9e900e785 100644
--- a/cmd/segment-reaper/bitmask_test.go
+++ b/cmd/segment-reaper/bit_array_test.go
@@ -13,7 +13,7 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func TestBitmask(t *testing.T) {
+func TestBitArray(t *testing.T) {
 	t.Run("Set", func(t *testing.T) {
 		t.Run("ok", func(t *testing.T) {
 			var (
@@ -33,7 +33,7 @@ func TestBitmask(t *testing.T) {
 
 			err := bits.Set(invalidIdx)
 			assert.Error(t, err)
-			assert.True(t, errorBitmaskInvalidIdx.Has(err), "errorBitmaskInvalidIdx class")
+			assert.True(t, errorBitArrayInvalidIdx.Has(err), "errorBitArrayInvalidIdx class")
 		})
 
 		t.Run("error: index > 63", func(t *testing.T) {
@@ -44,7 +44,7 @@ func TestBitmask(t *testing.T) {
 
 			err := bits.Set(invalidIdx)
 			assert.NoError(t, err)
-			assert.False(t, errorBitmaskInvalidIdx.Has(err), "errorBitmaskInvalidIdx class")
+			assert.False(t, errorBitArrayInvalidIdx.Has(err), "errorBitArrayInvalidIdx class")
 		})
 	})
 
@@ -68,7 +68,7 @@ func TestBitmask(t *testing.T) {
 
 			_, err := bits.Has(invalidIdx)
 			assert.Error(t, err)
-			assert.True(t, errorBitmaskInvalidIdx.Has(err), "errorBitmaskInvalidIdx class")
+			assert.True(t, errorBitArrayInvalidIdx.Has(err), "errorBitArrayInvalidIdx class")
 		})
 	})
 
@@ -318,7 +318,7 @@ func TestBitmask(t *testing.T) {
 
 			err := bits.Unset(invalidIdx)
 			assert.Error(t, err)
-			assert.True(t, errorBitmaskInvalidIdx.Has(err), "errorBitmaskInvalidIdx class")
+			assert.True(t, errorBitArrayInvalidIdx.Has(err), "errorBitArrayInvalidIdx class")
 		})
 	})
 }