diff --git a/test/fib_test.py b/test/fib_test.py
index f946e20..65e6763 100644
--- a/test/fib_test.py
+++ b/test/fib_test.py
@@ -81,4 +81,5 @@ def test_func(lon, lat):
     plt.title('error')
     m.colorbar()
     plt.tight_layout()
+    plt.savefig('fib_test.png')
     plt.show()