2 files changed, 18 insertions, 0 deletions
diff --git a/test/ripper/test_lexer.rb b/test/ripper/test_lexer.rb
index 8e8a616627..92587ae4c0 100644
--- a/test/ripper/test_lexer.rb
+++ b/test/ripper/test_lexer.rb
@@ -264,4 +264,13 @@ world"
     CODE
     assert_equal(code, Ripper.tokenize(code).join(""), bug)
   end
+
+  def test_heredoc_unterminated_interpolation
+    code = <<~'HEREDOC'
+    <<A+1
+    #{
+    HEREDOC
+
+    assert_include(Ripper.tokenize(code).join(""), "+1")
+  end
 end
diff --git a/test/ruby/test_parse.rb b/test/ruby/test_parse.rb
index 71507575a7..099050dc8d 100644
--- a/test/ruby/test_parse.rb
+++ b/test/ruby/test_parse.rb
@@ -1121,6 +1121,15 @@ x = __ENCODING__
     assert_equal v1, v3
   end
 
+  def test_heredoc_unterminated_interpolation
+    code = <<~'HEREDOC'
+    <<A+1
+    #{
+    HEREDOC
+
+    assert_syntax_error(code, /can't find string "A"/)
+  end
+
   def test_unexpected_token_error
     assert_syntax_error('"x"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx', /unexpected/)
   end