diff --git a/liblinphone_tester/custom_rules.xml b/liblinphone_tester/custom_rules.xml
index 8a36b3884..f72756875 100644
--- a/liblinphone_tester/custom_rules.xml
+++ b/liblinphone_tester/custom_rules.xml
@@ -73,7 +73,7 @@
 		</exec>
 		<exec executable="bash" >
 			<arg value="-c" />
-			<arg value="cat ${archive.name} |ndk-stack -sym libs-debug/`adb shell getprop ro.product.cpu.abi | tr -d '\r'`" />
+			<arg value="cat ${archive.name} |ndk-stack -sym ../libs-debug/`adb shell getprop ro.product.cpu.abi | tr -d '\r'`" />
 		</exec>
 		<fail message="Tests crashed" status="125"/>
 	</target>
diff --git a/prepare.py b/prepare.py
index 74789b13c..043956bf3 100755
--- a/prepare.py
+++ b/prepare.py
@@ -325,7 +325,8 @@ run-linphone:
 \tant run
 
 run-liblinphone-tests:
-\t$(MAKE) -C liblinphone_tester run-all-tests
+\t@cd liblinphone_tester && \\
+\tmake run-all-tests
 
 run-basic-tests: update-project
 \tant partial-clean