diff --git a/test/plugin/test_in_tail.rb b/test/plugin/test_in_tail.rb
index c72073fd51..504c5035f3 100644
--- a/test/plugin/test_in_tail.rb
+++ b/test/plugin/test_in_tail.rb
@@ -229,7 +229,7 @@ def test_emit_with_read_lines_limit(data)
       d = create_driver(config)
       msg = 'test' * 2000 # in_tail reads 8192 bytes at once.
 
-      d.run(expect_emits: num_events, timeout: 1) do
+      d.run(expect_emits: num_events, timeout: 2) do
         File.open("#{TMP_DIR}/tail.txt", "ab") {|f|
           f.puts msg
           f.puts msg