diff --git a/Library/Homebrew/test/Gemfile.lock b/Library/Homebrew/test/Gemfile.lock
index f8c0e6642a..d036e4a315 100644
--- a/Library/Homebrew/test/Gemfile.lock
+++ b/Library/Homebrew/test/Gemfile.lock
@@ -13,7 +13,7 @@ GEM
     json (2.1.0)
     mustache (1.1.0)
     parallel (1.12.1)
-    parallel_tests (2.26.2)
+    parallel_tests (2.27.0)
       parallel
     parser (2.5.3.0)
       ast (~> 2.4.0)