diff --git a/mark/byte_test.go b/mark/byte_test.go
index 9ea3fce..388e859 100644
--- a/mark/byte_test.go
+++ b/mark/byte_test.go
@@ -169,7 +169,7 @@ func TestByteIs(t *testing.T) {
 			Expected: false,
 		},
 		{
-			Value: 0x27, // == '\\'
+			Value: 0x27, // == '\''
 			Expected: true,
 		},
 		{
diff --git a/mark/rune_test.go b/mark/rune_test.go
index 720caaa..2dc2de0 100644
--- a/mark/rune_test.go
+++ b/mark/rune_test.go
@@ -169,7 +169,7 @@ func TestRuneIs(t *testing.T) {
 			Expected: false,
 		},
 		{
-			Value: 0x27, // == '\\'
+			Value: 0x27, // == '\''
 			Expected: true,
 		},
 		{