diff --git a/tests/RotationIndexerTest.cpp b/tests/RotationIndexerTest.cpp
index 87f0d7b7..45b561a5 100644
--- a/tests/RotationIndexerTest.cpp
+++ b/tests/RotationIndexerTest.cpp
@@ -65,6 +65,7 @@ TEST_CASE("RotationIndexer") {
             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);