diff --git a/corsika/detail/framework/geometry/LeapFrogTrajectory.inl b/corsika/detail/framework/geometry/LeapFrogTrajectory.inl
index 48ec83a24ee18b7ed51aa26809011be9a600197c..97340351e6b027dc17a8175c2e6337de6691ae79 100644
--- a/corsika/detail/framework/geometry/LeapFrogTrajectory.inl
+++ b/corsika/detail/framework/geometry/LeapFrogTrajectory.inl
@@ -55,7 +55,7 @@ namespace corsika {
   }
 
   template <typename Particle>
-  inline TimeType LeapFrogTrajectory::getTime(Particle& particle, double const u) const {
+  inline TimeType LeapFrogTrajectory::getTime(Particle const& particle, double const u) const {
     return particle.getTime() + getDuration(u);
   }
 
diff --git a/corsika/detail/framework/geometry/StraightTrajectory.inl b/corsika/detail/framework/geometry/StraightTrajectory.inl
index 9e54467b5aa92588371aa427751dc3405c3a9e1e..55ddbf9e0847450f21f0b5b9178322c7314710f3 100644
--- a/corsika/detail/framework/geometry/StraightTrajectory.inl
+++ b/corsika/detail/framework/geometry/StraightTrajectory.inl
@@ -24,7 +24,7 @@ namespace corsika {
   }
 
   template <typename Particle>
-  inline TimeType StraightTrajectory::getTime(Particle& particle, double const u) const {
+  inline TimeType StraightTrajectory::getTime(Particle const& particle, double const u) const {
     return particle.getTime() + getDuration(u);//timeStep_ * u;
   }
 
diff --git a/corsika/framework/geometry/LeapFrogTrajectory.hpp b/corsika/framework/geometry/LeapFrogTrajectory.hpp
index 2db3233b8c60a91e9a1e5e29c8e626134476a7b9..984097ac3ab764d3398ae144a7cfd3fccddfe170 100644
--- a/corsika/framework/geometry/LeapFrogTrajectory.hpp
+++ b/corsika/framework/geometry/LeapFrogTrajectory.hpp
@@ -74,7 +74,7 @@ namespace corsika {
 
     ///! time at the start (u=0) or at the end (u=1) of the track of a particle
     template <typename Particle>
-    TimeType getTime(Particle& particle, double const u) const;
+    TimeType getTime(Particle const& particle, double const u) const;
 
     ///! total length along potentially bend trajectory
     LengthType getLength(double const u = 1) const;
diff --git a/corsika/framework/geometry/StraightTrajectory.hpp b/corsika/framework/geometry/StraightTrajectory.hpp
index 40057258853b1809e6450c196d78cc39c2e826b2..a47da0db5b7adc82281dbd473678c27f38be31b4 100644
--- a/corsika/framework/geometry/StraightTrajectory.hpp
+++ b/corsika/framework/geometry/StraightTrajectory.hpp
@@ -86,7 +86,7 @@ namespace corsika {
 
     ///! time at the start (u=0) or at the end (u=1) of the track of a particle
     template <typename Particle>
-    TimeType getTime(Particle& particle, double const u) const;
+    TimeType getTime(Particle const& particle, double const u) const;
 
     ///! total length along potentially bend trajectory
     LengthType getLength(double const u = 1) const;
diff --git a/tests/framework/testGeometry.cpp b/tests/framework/testGeometry.cpp
index d688e8d749ce47e0180c61d9c2c56c6f77c86b3f..e78ac878bd8f66b2f15a9f2c9f13b204b5a4badf 100644
--- a/tests/framework/testGeometry.cpp
+++ b/tests/framework/testGeometry.cpp
@@ -375,7 +375,7 @@ TEST_CASE("Geometry Trajectories") {
     StraightTrajectory base(line, t);
     CHECK(line.getPosition(t).getCoordinates() == base.getPosition(1.).getCoordinates());
     // test the getTime() method for straight trajectory
-    CHECK( base.getTime(particle1, 1) / 1_s == Approx(1));
+    CHECK(base.getTime(particle1, 1) / 1_s == Approx(1));
 
     CHECK((base.getDirection(0).getComponents(rootCS) -
            QuantityVector<dimensionless_d>{1, 0, 0})
@@ -442,9 +442,9 @@ TEST_CASE("Geometry Trajectories") {
     LeapFrogTrajectory base(pos, v0, B0, k, t);
 
     // test the getTime() method for trajectories
-    CHECK( (base.getTime(particle1,1) - t) / 1_s == 0 );
-    CHECK( base.getTime(particle1,0) / 1_s == Approx(0) );
-    CHECK( (base.getTime(particle1,0) + t) / 1_s == Approx(1e-12) );
+    CHECK((base.getTime(particle1,1) - t) / 1_s == Approx(0));
+    CHECK(base.getTime(particle1,0) / 1_s == Approx(0));
+    CHECK((base.getTime(particle1,0) + t) / 1_s == Approx(1e-12));
   }
 }