diff --git a/gtsam/navigation/tests/testImuFactor.cpp b/gtsam/navigation/tests/testImuFactor.cpp
index 801d87895..585da38b1 100644
--- a/gtsam/navigation/tests/testImuFactor.cpp
+++ b/gtsam/navigation/tests/testImuFactor.cpp
@@ -819,7 +819,6 @@ struct ImuFactorMergeTest {
         loop_(Vector3(0, -kAngularVelocity, 0), Vector3(kVelocity, 0, 0)) {
     // arbitrary noise values
     p_->gyroscopeCovariance = I_3x3 * 0.01;
-    p_->accelerometerCovariance = I_3x3 * 0.02;
     p_->accelerometerCovariance = I_3x3 * 0.03;
   }