diff --git a/lib/common.Makefile b/lib/common.Makefile
index 30bf4c217..c6f7b427e 100644
--- a/lib/common.Makefile
+++ b/lib/common.Makefile
@@ -54,6 +54,6 @@ t38.c:		spandsp_logging.h
 	../utils/const_str_hash "$<" < "$<" > "$@"
 
 $(BUILD_TEST_ALTS):	../lib/$(@:.h=-*)
-	../utils/build_test_wrapper "$@"
+	../utils/build_test_wrapper "$@" 2> /dev/null
 
 .PHONY: all debug clean install