diff --git a/BSDmakefile b/BSDmakefile
index 790a7288e..01e98c597 100644
--- a/BSDmakefile
+++ b/BSDmakefile
@@ -43,7 +43,7 @@ BUILD_TOOLS?=OFF
 #  1: ERROR
 #  2: INFO + ERROR
 #  3: DEBUG + INFO + ERROR
-ZENOH_DEBUG?=0
+ZENOH_DEBUG?=3
 
 # zenoh-pico/ directory
 ROOT_DIR:=$(shell dirname $(realpath $(firstword $(MAKEFILE_LIST))))
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 889c49a2b..5a90bbcc0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -584,6 +584,7 @@ if(UNIX OR MSVC)
       configure_file(${PROJECT_SOURCE_DIR}/tests/routed.sh ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/routed.sh COPYONLY)
       configure_file(${PROJECT_SOURCE_DIR}/tests/api.sh ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/api.sh COPYONLY)
 
+      list(APPEND CMAKE_CTEST_ARGUMENTS "--output-on-failure")
       enable_testing()
 	  # add_test(z_client_test bash ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/routed.sh z_client_test)
 	  # add_test(z_api_alignment_test bash ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/api.sh z_api_alignment_test)
diff --git a/GNUmakefile b/GNUmakefile
index 95942d486..3db76209a 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -51,7 +51,7 @@ ASAN?=OFF
 #  1: ERROR
 #  2: INFO + ERROR
 #  3: DEBUG + INFO + ERROR
-ZENOH_DEBUG?=0
+ZENOH_DEBUG?=3
 
 # Feature config toggle
 # Accepted values: 0, 1
diff --git a/tests/api.sh b/tests/api.sh
index 01f37c499..aeb2f4b8e 100644
--- a/tests/api.sh
+++ b/tests/api.sh
@@ -53,7 +53,7 @@ for LOCATOR in $(echo "$LOCATORS" | xargs); do
     sleep 5
 
     echo "> Running $TESTBIN ..."
-    "$TESTBIN" "$LOCATOR"
+    "$TESTBIN" "$LOCATOR" 1>&2
     RETCODE=$?
 
     echo "> Stopping zenohd ..."