diff --git a/unittest/force-styles/tests/angle-amoeba.yaml b/unittest/force-styles/tests/angle-amoeba.yaml
index 6265ce09fd..e94a3c3b62 100644
--- a/unittest/force-styles/tests/angle-amoeba.yaml
+++ b/unittest/force-styles/tests/angle-amoeba.yaml
@@ -20,7 +20,13 @@ angle_coeff: ! |
   * ub 0.0 0.0
   4 ub -7.6 1.5537
 equilibrium: 4 1.9320794819577227 1.9687313962496038 2.1676989309769574 1.8936822384138474
-extract: ! ""
+extract: ! |
+  k2 1
+  k3 1
+  k4 1
+  k5 1
+  k6 1
+  theta0 1
 natoms: 29
 init_energy: 22.644137017730763
 init_stress: ! |2-