diff --git a/tests/runtime_shell/custom_calyptia.sh b/tests/runtime_shell/custom_calyptia.sh
index 2094302b236..334a772497e 100755
--- a/tests/runtime_shell/custom_calyptia.sh
+++ b/tests/runtime_shell/custom_calyptia.sh
@@ -27,7 +27,7 @@ test_custom_calyptia_fleet_yaml() {
     fi
 
     # Clean up
-    kill -15 $FLB_PID
+    kill -15 $FLB_PID || true
 }
 
 test_custom_calyptia_fleet_toml() {
@@ -57,7 +57,7 @@ test_custom_calyptia_fleet_toml() {
     fi
 
     # Clean up
-    kill -15 $FLB_PID
+    kill -15 $FLB_PID || true
 }
 
 # The following command launch the unit test