diff --git a/test/gtest_solve_problem_force_torque_inertial_dynamics.cpp b/test/gtest_solve_problem_force_torque_inertial_dynamics.cpp
index 25ff34bda2b501ffa60b30031d3cdb0f88fd72e9..125a14a808c74801592dcf9d41b885d967ffa9bd 100644
--- a/test/gtest_solve_problem_force_torque_inertial_dynamics.cpp
+++ b/test/gtest_solve_problem_force_torque_inertial_dynamics.cpp
@@ -643,8 +643,8 @@ TEST_F(Test_SolveProblemForceTorqueInertialDynamics_yaml, rotation_around_z_axis
         WOLF_INFO("-----------------------------");
     }
 
-    WOLF_INFO("True inertia     : ", inertia_true, " m^2 Kg.");
-    WOLF_INFO("Guess inertia    : ", inertia_guess, " m^2 Kg.");
+    WOLF_INFO("True inertia     : ", inertia_true.transpose(), " m^2 Kg.");
+    WOLF_INFO("Guess inertia    : ", inertia_guess.transpose(), " m^2 Kg.");
     WOLF_INFO("Estimated inertia: ", S->getStateBlock('i')->getState().transpose(), " m^2 Kg.");
     WOLF_INFO("-----------------------------");
     auto inertia_estimated = S->getStateBlock('i')->getState();