diff --git a/test/gtest_imu.cpp b/test/gtest_imu.cpp
index 4dccf7990fddede69f4fd339c748657296326621..faa4a99ed86d82d8841228168ae875104dbfcb8e 100644
--- a/test/gtest_imu.cpp
+++ b/test/gtest_imu.cpp
@@ -1542,7 +1542,7 @@ TEST_F(Process_Factor_Imu_ODO, RecoverTrajectory_MotionRandom_PqV_b__pqV_b) // F
 TEST_F(Process_Factor_Imu, bootstrap)
 {
     processor_imu->setVotingActive(true);
-    processor_imu->setMaxTimeSpan(0.4);
+    processor_imu->setMaxTimeSpan(0.04);
 
     auto KF0 = problem->emplaceFrame(0.0);
     problem->keyFrameCallback(KF0,nullptr);