diff --git a/lib/spack/spack/test/llnl/util/lock.py b/lib/spack/spack/test/llnl/util/lock.py
index 8980043f13d28cc90704012970c6b226651675e3..fb8bc8e625ff573b00d1dedc87481326756d65e7 100644
--- a/lib/spack/spack/test/llnl/util/lock.py
+++ b/lib/spack/spack/test/llnl/util/lock.py
@@ -805,6 +805,7 @@ def p3(self, barrier):
         barrier.wait()  # ---------------------------------------- 13
         lock.release_read()
 
+
 #
 # Longer test case that ensures locks are reusable. Ordering is
 # enforced by barriers throughout -- steps are shown with numbers.