diff --git a/tests/XtalOptimizerTest.cpp b/tests/XtalOptimizerTest.cpp
index 96bc42ee..94e2705c 100644
--- a/tests/XtalOptimizerTest.cpp
+++ b/tests/XtalOptimizerTest.cpp
@@ -587,6 +587,7 @@ TEST_CASE("XtalOptimizer_rotation") {
             s.x = r.predicted_x;
             s.y = r.predicted_y;
             s.image = img;       // provide image index for rotation-aware refinement
+            s.phi = angle_deg;
             s.intensity = 1.0f;  // minimal positive value
             s.ice_ring = false;
             s.indexed = true;
@@ -668,6 +669,7 @@ TEST_CASE("XtalOptimizer_refine_rotation_axis") {
             s.y = r.predicted_y;
             s.image = img;       // provide image index for rotation-aware refinement
             s.intensity = 1.0f;  // minimal positive value
+            s.phi = angle_deg;
             s.ice_ring = false;
             s.indexed = true;
             spots.push_back(s);