diff --git a/runtime/Go/antlr/testing_lexer_b_test.go b/runtime/Go/antlr/testing_lexer_b_test.go
index 4ab9b340d3..b5691b574c 100644
--- a/runtime/Go/antlr/testing_lexer_b_test.go
+++ b/runtime/Go/antlr/testing_lexer_b_test.go
@@ -21,23 +21,22 @@ WS : ' '+;
 */
 
 var lexerB_serializedLexerAtn = []uint16{
-	3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 2, 9, 40, 8,
-	1, 4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 4, 5, 9, 5, 4, 6, 9, 6, 4, 7, 9,
-	7, 4, 8, 9, 8, 3, 2, 6, 2, 19, 10, 2, 13, 2, 14, 2, 20, 3, 3, 6, 3, 24,
-	10, 3, 13, 3, 14, 3, 25, 3, 4, 3, 4, 3, 5, 3, 5, 3, 6, 3, 6, 3, 7, 3, 7,
-	3, 8, 6, 8, 37, 10, 8, 13, 8, 14, 8, 38, 2, 2, 9, 3, 3, 5, 4, 7, 5, 9,
-	6, 11, 7, 13, 8, 15, 9, 3, 2, 2, 2, 42, 2, 3, 3, 2, 2, 2, 2, 5, 3, 2, 2,
-	2, 2, 7, 3, 2, 2, 2, 2, 9, 3, 2, 2, 2, 2, 11, 3, 2, 2, 2, 2, 13, 3, 2,
-	2, 2, 2, 15, 3, 2, 2, 2, 3, 18, 3, 2, 2, 2, 5, 23, 3, 2, 2, 2, 7, 27, 3,
-	2, 2, 2, 9, 29, 3, 2, 2, 2, 11, 31, 3, 2, 2, 2, 13, 33, 3, 2, 2, 2, 15,
-	36, 3, 2, 2, 2, 17, 19, 4, 99, 124, 2, 18, 17, 3, 2, 2, 2, 19, 20, 3, 2,
-	2, 2, 20, 18, 3, 2, 2, 2, 20, 21, 3, 2, 2, 2, 21, 4, 3, 2, 2, 2, 22, 24,
-	4, 50, 59, 2, 23, 22, 3, 2, 2, 2, 24, 25, 3, 2, 2, 2, 25, 23, 3, 2, 2,
-	2, 25, 26, 3, 2, 2, 2, 26, 6, 3, 2, 2, 2, 27, 28, 7, 61, 2, 2, 28, 8, 3,
-	2, 2, 2, 29, 30, 7, 63, 2, 2, 30, 10, 3, 2, 2, 2, 31, 32, 7, 45, 2, 2,
-	32, 12, 3, 2, 2, 2, 33, 34, 7, 44, 2, 2, 34, 14, 3, 2, 2, 2, 35, 37, 7,
-	34, 2, 2, 36, 35, 3, 2, 2, 2, 37, 38, 3, 2, 2, 2, 38, 36, 3, 2, 2, 2, 38,
-	39, 3, 2, 2, 2, 39, 16, 3, 2, 2, 2, 6, 2, 20, 25, 38, 2,
+	4, 0, 7, 38, 6, 65535, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3,
+	2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 1, 0, 4, 0, 17, 8, 0, 11, 0, 12, 0,
+	18, 1, 1, 4, 1, 22, 8, 1, 11, 1, 12, 1, 23, 1, 2, 1, 2, 1, 3, 1, 3, 1,
+	4, 1, 4, 1, 5, 1, 5, 1, 6, 4, 6, 35, 8, 6, 11, 6, 12, 6, 36, 0, 0, 7, 1,
+	1, 3, 2, 5, 3, 7, 4, 9, 5, 11, 6, 13, 7, 1, 0, 0, 0, 40, 0, 1, 1, 0, 0,
+	0, 0, 3, 1, 0, 0, 0, 0, 5, 1, 0, 0, 0, 0, 7, 1, 0, 0, 0, 0, 9, 1, 0, 0,
+	0, 0, 11, 1, 0, 0, 0, 0, 13, 1, 0, 0, 0, 1, 16, 1, 0, 0, 0, 3, 21, 1, 0,
+	0, 0, 5, 25, 1, 0, 0, 0, 7, 27, 1, 0, 0, 0, 9, 29, 1, 0, 0, 0, 11, 31,
+	1, 0, 0, 0, 13, 34, 1, 0, 0, 0, 15, 17, 2, 97, 122, 0, 16, 15, 1, 0, 0,
+	0, 17, 18, 1, 0, 0, 0, 18, 16, 1, 0, 0, 0, 18, 19, 1, 0, 0, 0, 19, 2, 1,
+	0, 0, 0, 20, 22, 2, 48, 57, 0, 21, 20, 1, 0, 0, 0, 22, 23, 1, 0, 0, 0,
+	23, 21, 1, 0, 0, 0, 23, 24, 1, 0, 0, 0, 24, 4, 1, 0, 0, 0, 25, 26, 5, 59,
+	0, 0, 26, 6, 1, 0, 0, 0, 27, 28, 5, 61, 0, 0, 28, 8, 1, 0, 0, 0, 29, 30,
+	5, 43, 0, 0, 30, 10, 1, 0, 0, 0, 31, 32, 5, 42, 0, 0, 32, 12, 1, 0, 0,
+	0, 33, 35, 5, 32, 0, 0, 34, 33, 1, 0, 0, 0, 35, 36, 1, 0, 0, 0, 36, 34,
+	1, 0, 0, 0, 36, 37, 1, 0, 0, 0, 37, 14, 1, 0, 0, 0, 4, 0, 18, 23, 36, 0,
 }
 
 var lexerB_lexerDeserializer = NewATNDeserializer(nil)
diff --git a/runtime/Go/antlr/tokenstream_rewriter_test.go b/runtime/Go/antlr/tokenstream_rewriter_test.go
index 8d61d35123..852f50232c 100644
--- a/runtime/Go/antlr/tokenstream_rewriter_test.go
+++ b/runtime/Go/antlr/tokenstream_rewriter_test.go
@@ -10,6 +10,16 @@ import (
 	"strings"
 )
 
+
+/* Assume the following grammar for this test.
+
+lexer grammar LexerA;
+A : 'a';
+B : 'b';
+C : 'c';
+
+*/
+
 func TestInsertBeforeIndex0(t *testing.T){
 	input := NewInputStream("abc")
 	lexer := NewLexerA(input)
@@ -319,12 +329,12 @@ var _ = fmt.Printf
 var _ = unicode.IsLetter
 
 var serializedLexerAtn = []uint16{
-	3, 24715, 42794, 33075, 47597, 16764, 15335, 30598, 22884, 2, 5, 15, 8,
-	1, 4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 3, 2, 3, 2, 3, 3, 3, 3, 3, 4, 3,
-	4, 2, 2, 5, 3, 3, 5, 4, 7, 5, 3, 2, 2, 2, 14, 2, 3, 3, 2, 2, 2, 2, 5, 3,
-	2, 2, 2, 2, 7, 3, 2, 2, 2, 3, 9, 3, 2, 2, 2, 5, 11, 3, 2, 2, 2, 7, 13,
-	3, 2, 2, 2, 9, 10, 7, 99, 2, 2, 10, 4, 3, 2, 2, 2, 11, 12, 7, 100, 2, 2,
-	12, 6, 3, 2, 2, 2, 13, 14, 7, 101, 2, 2, 14, 8, 3, 2, 2, 2, 3, 2, 2,
+	4, 0, 3, 13, 6, 65535, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 1, 0, 1, 0,
+	1, 1, 1, 1, 1, 2, 1, 2, 0, 0, 3, 1, 1, 3, 2, 5, 3, 1, 0, 0, 0, 12, 0, 1,
+	1, 0, 0, 0, 0, 3, 1, 0, 0, 0, 0, 5, 1, 0, 0, 0, 1, 7, 1, 0, 0, 0, 3, 9,
+	1, 0, 0, 0, 5, 11, 1, 0, 0, 0, 7, 8, 5, 97, 0, 0, 8, 2, 1, 0, 0, 0, 9,
+	10, 5, 98, 0, 0, 10, 4, 1, 0, 0, 0, 11, 12, 5, 99, 0, 0, 12, 6, 1, 0, 0,
+	0, 1, 0, 0,
 }
 
 var lexerDeserializer = NewATNDeserializer(nil)