diff --git a/tests/gravity_model_cartesian.prm b/tests/gravity_model_cartesian.prm
index 07b48bd7b11..3d978f458da 100644
--- a/tests/gravity_model_cartesian.prm
+++ b/tests/gravity_model_cartesian.prm
@@ -1,5 +1,5 @@
 # This is a test based on benchmarks/onset-of-convection/convection-box-base.prm.
-# It makes sure that the gravity plugin 'function' works correctly 
+# It makes sure that the gravity plugin 'function' works correctly
 # for a Cartesian coordinate system.
 
 set Dimension                              = 2
diff --git a/tests/gravity_model_spherical.prm b/tests/gravity_model_spherical.prm
index ba79337f1ba..37f8b082d7f 100644
--- a/tests/gravity_model_spherical.prm
+++ b/tests/gravity_model_spherical.prm
@@ -1,4 +1,4 @@
-# This is a test based on benchmarks/onset-of-convection/convection-box-base.prm. 
+# This is a test based on benchmarks/onset-of-convection/convection-box-base.prm.
 # It makes sure that the gravity plugin 'function' works correctly for a
 # Cartesian coordinate system.