diff --git a/hasher_test.go b/hasher_test.go
index 8cc71c2..cefc169 100644
--- a/hasher_test.go
+++ b/hasher_test.go
@@ -901,20 +901,20 @@ func TestComputeNsRange(t *testing.T) {
 // TestEmptyRoot ensures that the empty root is always the same, under the same configuration, regardless of the state of the Hasher.
 func TestEmptyRoot(t *testing.T) {
 	t.Run("the empty root should match a hard-coded empty root", func(t *testing.T) {
-		nIDSzie := 1
-		ignoreMaxNS := true
+		nIDSize := 1
+		ignoreMaxNs := true
 
-		hasher := NewNmtHasher(sha256.New(), namespace.IDSize(nIDSzie), ignoreMaxNS)
+		hasher := NewNmtHasher(sha256.New(), namespace.IDSize(nIDSize), ignoreMaxNs)
 		got := hasher.EmptyRoot()
 		want := []byte{0x0, 0x0, 0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14, 0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24, 0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c, 0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55}
 		assert.Equal(t, want, got)
 	})
 
 	t.Run("empty root should return the same root even if the hasher is modified", func(t *testing.T) {
-		nIDSzie := 1
-		ignoreMaxNS := true
+		nIDSize := 1
+		ignoreMaxNs := true
 
-		hasher := NewNmtHasher(sha256.New(), namespace.IDSize(nIDSzie), ignoreMaxNS)
+		hasher := NewNmtHasher(sha256.New(), namespace.IDSize(nIDSize), ignoreMaxNs)
 		want := hasher.EmptyRoot()
 
 		// perform some operation with the hasher