diff --git a/test/test_permeation_problem.py b/test/test_permeation_problem.py
index 88fad97d2..b8534107e 100644
--- a/test/test_permeation_problem.py
+++ b/test/test_permeation_problem.py
@@ -18,7 +18,7 @@
 
 def test_permeation_problem():
     L = 3e-04
-    vertices = np.linspace(0, L, num=3001)
+    vertices = np.linspace(0, L, num=1001)
 
     my_mesh = F.Mesh1D(vertices)