diff --git a/setup.cfg b/setup.cfg
index 105071003726688af661ccd157a11decac4ef4dc..586c1fcbc75a1bd86c3b0cf036f5ac1d1e9d33c6 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -8,4 +8,4 @@ toolkits = True
 toolkits_tests = True
 
 [rc_options]
-backend = GTKAgg
+backend = GTK3Agg