diff --git a/lib/parser/ruby34.y b/lib/parser/ruby34.y
index 439d835b8..c8be29773 100644
--- a/lib/parser/ruby34.y
+++ b/lib/parser/ruby34.y
@@ -3116,7 +3116,7 @@ require 'parser'
 ---- inner
 
   def version
-    33
+    34
   end
 
   def default_encoding
diff --git a/test/test_parser.rb b/test/test_parser.rb
index f76eadb38..df3c9a34a 100644
--- a/test/test_parser.rb
+++ b/test/test_parser.rb
@@ -33,6 +33,7 @@ def parser_for_ruby_version(version)
   SINCE_3_1 = SINCE_3_0 - %w(3.0)
   SINCE_3_2 = SINCE_3_1 - %w(3.1)
   SINCE_3_3 = SINCE_3_2 - %w(3.2)
+  SINCE_3_4 = SINCE_3_3 - %w(3.3)
 
   # Guidelines for test naming:
   #  * Test structure follows structure of AST_FORMAT.md.
@@ -9218,7 +9219,7 @@ def test_pattern_matching_hash_with_heredoc_keys
     # diagnostic error because of the wrong lvar name
     assert_diagnoses(
       [:error, :lvar_name, { name: "a\n" }],
-      %Q{case nil; in "\#{ <<-HERE }":;\na\nHERE\nelse\nend},
+      "case nil; in \"\#{ <<-HERE }\":;\na\nHERE\nelse\nend",
       %q{                 ~~~~~~~ location},
       SINCE_2_7
     )
@@ -10600,7 +10601,7 @@ def test_parser_drops_truncated_parts_of_squiggly_heredoc
       s(:dstr,
         s(:begin),
         s(:str, "\n")),
-      %q{<<~HERE!  #{}!HERE}.gsub('!', "\n"),
+      "<<~HERE\n  \#{}\nHERE",
       %q{},
       SINCE_2_3)
   end