diff --git a/unittest/force-styles/tests/fix-timestep-adapt_coul.yaml b/unittest/force-styles/tests/fix-timestep-adapt_coul.yaml
index 9462c78d14..7169e6c2f9 100644
--- a/unittest/force-styles/tests/fix-timestep-adapt_coul.yaml
+++ b/unittest/force-styles/tests/fix-timestep-adapt_coul.yaml
@@ -6,6 +6,7 @@ skip_tests:
 prerequisites: ! |
   atom full
   fix adapt
+  kspace pppm
 pre_commands: ! |
   variable scale equal ramp(0.5,1.0)
 post_commands: ! |