diff --git a/pkgs/applications/science/math/sage/sage-tests.nix b/pkgs/applications/science/math/sage/sage-tests.nix
index 3e3c32b2c8d..591fa192d56 100644
--- a/pkgs/applications/science/math/sage/sage-tests.nix
+++ b/pkgs/applications/science/math/sage/sage-tests.nix
@@ -3,7 +3,7 @@
 , sage-with-env
 , makeWrapper
 , files ? null # "null" means run all tests
-, longTests ? false # run tests marked as "long time" (roughly doubles runtime)
+, longTests ? true # run tests marked as "long time" (roughly doubles runtime)
 # Run as many tests as possible in approximately n seconds. This will give each
 # file to test a "time budget" and stop tests if it is exceeded. 300 is the
 # upstream default value.