diff --git a/Makefile b/Makefile
index 3f61fc2809..9fa1de7117 100644
--- a/Makefile
+++ b/Makefile
@@ -259,13 +259,11 @@ dist_clean_irreversible: clean
 ab_clean:
 	find sw/airborne -name '*~' -exec rm -f {} \;
 
-test_all_example_airframes2: test_all_example_airframes
-
 test_all_example_airframes: replace_current_conf_xml
 	for ap in `grep name conf/conf.xml.example | sed -e 's/.*name=\"//' | sed -e 's/"//'`; do echo "Making $$ap"; make -C ./ AIRCRAFT=$$ap clean_ac ap.compile || exit 1;   done
 
 replace_current_conf_xml:
-	mv conf/conf.xml conf/conf.xml.backup.`date +%Y%m%d-%H%M%s`
+	test conf/conf.xml || mv conf/conf.xml conf/conf.xml.backup.`date +%Y%m%d-%H%M%s`
 	cp conf/conf.xml.example conf/conf.xml
 
 commands: paparazzi sw/simulator/launchsitl