diff --git a/spec/build_tests_spec.rb b/spec/build_tests_spec.rb
index 67487b1..debddaf 100644
--- a/spec/build_tests_spec.rb
+++ b/spec/build_tests_spec.rb
@@ -1029,7 +1029,7 @@ EOF
         "NonThreadedTestBuilder d",
       ]
       elapsed = Time.new - start_time
-      expect(elapsed).to be < 3
+      expect(elapsed).to be < 4
     end
   end