diff --git a/tests/test_optimizer.py b/tests/test_optimizer.py
index 35de044c..2e897f6d 100644
--- a/tests/test_optimizer.py
+++ b/tests/test_optimizer.py
@@ -12,6 +12,7 @@
 
 MASTERFUNC_OUTPUTS = ["fobj", "fcon", "gobj", "gcon"]
 
+
 class TestOptimizer(unittest.TestCase):
     tol = 1e-12