diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 4ebce2d5c6..2834acf72f 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -62,7 +62,10 @@ jobs:
           - debug
           - assert
         include:
-          # sista build not fully prepared for linux64x64, so only choose selected configurations for linux32x86
+          - arch: linux64x64
+            flavor: squeak.sista.spur
+            heartbeat: threaded
+            mode: fast
           - arch: linux32x86
             flavor: squeak.sista.spur
             heartbeat: threaded